Date   

[ANNOUNCE] v4.19.106-cip21-rt8

Pavel Machek
 

Hi!

vv4.19.106-cip21-rt8 should be available at kernel.org.

We are only testing kernels in non-realtime configurations, but this
proved useful in this case, and uncovered problem on de0-nano (32-bit
arm). Bisecting was quite interesting, but in the end we got close
enough to guess the guilty commit, and fix was comparatively
easy. Thanks for all the help (and that includes upstream). I still
need that or equivalent patch merged into -rt tree. Technical details
are here:

https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git/commit/?h=linux-4.19.y-cip-rt&id=1edcec1ee609d349e520e85e7cdfd938f6bafdda

Trees are available at

https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git/log/?h=linux-4.19.y-cip-rt

https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git/log/?h=linux-4.19.y-cip-rt-rebase

And their content should be identical.

Best regards,
Pavel

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


Re: Super long-term kernel support

Jan Kiszka
 

On 23.03.20 17:54, Andreas Weißel wrote:
Hi CIP kernel team,
I have a question regarding the super long-term kernel support: can
other commercial or non-commercial projects make use of such kernel
versions like "linux-4.19.y-cip", i.e., use the CIP git repositories
to address security issues (CVEs) in the Linux kernel even after the
upstream long-term versions are no longer supported, or is this
considered a service for members only?
As Pavel already pointed out: The CIP kernel naturally remains a GPL project, usage is free under the terms of this license.

The benefits of being a CIP member - besides ensuring the funding of this work - is the chance to influence which configurations and, thus, subsystems the CIP kernel will support, and on which hardware.

Best regards,
Jan

--
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux


Re: realtime on de0-nano bisection

Pavel Machek
 

Hi!

In the meantime:

https://gitlab.com/cip-project/cip-kernel/linux-cip/-/jobs/478548891
https://lava.ciplatform.org/scheduler/job/13037

So yes, it seems this is not reproducible. Is it easy to make the test
run .. say 5 times?
Just repeat the test case name 5 times in the gitlab-ci file.
E.g. https://gitlab.com/cip-project/cip-kernel/linux-cip/-/commit/791b84001ce05a9a26117a0c2de0e7250b343960
Thanks for useful trick. I'll try to remember it in case it is needed
again.

Best regards,
Pavel
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany


Re: Super long-term kernel support

Pavel Machek
 

Hi!

I have a question regarding the super long-term kernel support: can
other commercial or non-commercial projects make use of such kernel
versions like "linux-4.19.y-cip", i.e., use the CIP git repositories
to address security issues (CVEs) in the Linux kernel even after the
upstream long-term versions are no longer supported, or is this
considered a service for members only?
Kernel is GPLed. If you get any version of kernel from anywhere, you
are basically welcome to use it any way you want. That's what GPL
says.

Check with your lawyers.

(Plus, CIP project is trying to be friendly member of community....)

Best regards,
Pavel
(Not a lawyer, not speaking for anyone but my horse.)
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


Super long-term kernel support

Andreas Weißel <andreas.weissel@...>
 

Hi CIP kernel team,

I have a question regarding the super long-term kernel support: can
other commercial or non-commercial projects make use of such kernel
versions like "linux-4.19.y-cip", i.e., use the CIP git repositories
to address security issues (CVEs) in the Linux kernel even after the
upstream long-term versions are no longer supported, or is this
considered a service for members only?

Regards
Andreas Weissel


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Re: [backport 4.4] mac80211: Fix TKIP replay protection immediately after key setup

Ben Hutchings <ben.hutchings@...>
 

On Mon, 2020-02-17 at 23:14 +0000, nobuhiro1.iwamatsu@toshiba.co.jp wrote:
Hi Pavel,

-----Original Message-----
From: cip-dev [mailto:cip-dev-bounces@lists.cip-project.org] On Behalf
Of Pavel Machek
Sent: Sunday, February 16, 2020 4:54 AM
To: cip-dev@lists.cip-project.org; Chris.Paterson2@renesas.com
Subject: [cip-dev] [backport 4.4] mac80211: Fix TKIP replay protection
immediately after key setup

Hi!

So... this is first backport patch. I'll need to reformat a changelog.

The patch should pass our tests on gitlab, but I somehow don't think those
tests involved wifi at all... At least it compiles.

Can someone test it easily? Should I just submit it to stable explaining
I did not test it?
If testing is difficult, how about sending a patch to stable ML as RFC?
We may get reviews from the patch authors.

Do you have other patches that should go to 4.4/4.19?
I don't think there are other patches.
The security tracker shows a lot of fixes missing from 4.4.

Ben.

--
Ben Hutchings, Software Developer Codethink Ltd
https://www.codethink.co.uk/ Dale House, 35 Dale Street
Manchester, M1 2HF, United Kingdom


Re: [backport 4.4] mac80211: Fix TKIP replay protection immediately after key setup

Ben Hutchings <ben.hutchings@...>
 

On Sat, 2020-02-15 at 20:54 +0100, Pavel Machek wrote:
Hi!

So... this is first backport patch. I'll need to reformat a changelog.

The patch should pass our tests on gitlab, but I somehow don't think
those tests involved wifi at all... At least it compiles.

Can someone test it easily? Should I just submit it to stable
explaining I did not test it?
That's what I would do.

Do you have other patches that should go to 4.4/4.19?

Best regards,
Pavel

commit 911e21ed055f6700fa80d0f7a818ba223999bb2a
Author: Pavel Machek <pavel@ucw.cz>
Date: Thu Feb 13 22:56:46 2020 +0100

Author: Jouni Malinen <j@w1.fi>
Date: Tue Jan 7 17:35:45 2020 +0200

commit fa73f24d1b119b85b32cd8f217a73d108888097e
This reference is wrong; the upstream commit is
6f601265215a421f425ba3a4850a35861d024643. Also the usual format for
this reference has "upstream." after the commit hash.

[...]
--- a/net/mac80211/tkip.c
+++ b/net/mac80211/tkip.c
@@ -265,10 +265,21 @@ int ieee80211_tkip_decrypt_data(struct crypto_cipher *tfm,
if ((keyid >> 6) != key->conf.keyidx)
return TKIP_DECRYPT_INVALID_KEYIDX;

- if (key->u.tkip.rx[queue].state != TKIP_STATE_NOT_INIT &&
- (iv32 < key->u.tkip.rx[queue].iv32 ||
- (iv32 == key->u.tkip.rx[queue].iv32 &&
- iv16 <= key->u.tkip.rx[queue].iv16)))
+ /* Reject replays if the received TSC is smaller than or equal to the
+ * last received value in a valid message, but with an exception for
+ * the case where a new key has been set and no valid frame using that
+ * key has yet received and the local RSC was initialized to 0. This
+ * exception allows the very first frame sent by the transmitter to be
+ * accepted even if that transmitter were to use TSC 0 (IEEE 802.11
+ * described TSC to be initialized to 1 whenever a new key is taken into
+ * use).
+ */
+ if (iv32 < key->u.tkip.rx[queue].iv32 ||
+ (iv32 == key->u.tkip.rx[queue].iv32 &&
+ (iv16 < key->u.tkip.rx[queue].iv16 ||
+ (iv16 == key->u.tkip.rx[queue].iv16 &&
+ (key->u.tkip.rx[queue].iv32 || key->u.tkip.rx[queue].iv16 ||
+ key->u.tkip.rx[queue].state != TKIP_STATE_NOT_INIT)))))
return TKIP_DECRYPT_REPLAY;

if (only_iv) {
This backport makes sense to me. Please can you send it to the stable
list, with the fixed commit message?

Ben.

--
Ben Hutchings, Software Developer Codethink Ltd
https://www.codethink.co.uk/ Dale House, 35 Dale Street
Manchester, M1 2HF, United Kingdom


Re: realtime on de0-nano bisection

Chris Paterson
 

Hi Pavel,

From: Pavel Machek <pavel@denx.de>
Sent: 19 March 2020 21:24

Hi!

From: cip-dev <cip-dev-bounces@lists.cip-project.org> On Behalf Of Chris
Paterson
Sent: 19 March 2020 11:23

Hello Pavel,

From: Pavel Machek <pavel@denx.de>
Sent: 19 March 2020 11:05
[...]
like tests are unreliable (and even my basic assumptions may be worth
re-testing).

Can you help? I'll be away from console for a few hours now.
I'll get bisecting.
Last 'good' patch is: 2089f853a8c3 ("drm/i915: disable tracing on
-RT")
The first 'bad' path is: c82fe0af5e58 ("drm/i915: skip
DRM_I915_LOW_LEVEL_TRACEPOINTS with NOTRACE")

Don't ask me why c82fe0af5e58 causes a boot issue on the de0-nano
board but at least it's a starting point for you.
[...]

When bisection finds a commit touching code that you're not even
building, the answer should not be "don't ask me why" but "this is not
a reproducible bug".
That's my job, I guess. I asked for bisect and got bisect
(thanks!). And yes, I have to agree:

In the meantime:

https://gitlab.com/cip-project/cip-kernel/linux-cip/-/jobs/478548891
https://lava.ciplatform.org/scheduler/job/13037

So yes, it seems this is not reproducible. Is it easy to make the test
run .. say 5 times?
Just repeat the test case name 5 times in the gitlab-ci file.
E.g. https://gitlab.com/cip-project/cip-kernel/linux-cip/-/commit/791b84001ce05a9a26117a0c2de0e7250b343960

Regards, Chris



I'm starting to suspect

pick fc9f4631a290 irqwork: push most work into softirq context

Best regards,
                                                              Pavel
--
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany


Re: Backporting "net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup"

Ben Hutchings <ben.hutchings@...>
 

On Fri, 2020-03-13 at 22:03 +0100, Pavel Machek wrote:
Hi!

Here's backport of `subj` to 4.19. ip6_dst_lookup_flow() prototype
changed between 4.19 and mainline, files were moved around, and I
could not find some instances to update. Fun!
I also had a go at this before catching up on cip-dev and finding you
had also done so. So I've compared this with my version.

I did minimal compile testing, I'll need to run it behind gitlab ci;
but... if you are using IPv6 and can test this, it would be nice.
I haven't done real testing yet either.

Best regards,
Pavel



diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index 46b855a42884..e3c948617c73 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -415,9 +415,9 @@ static int addr6_resolve(struct sockaddr_in6 *src_in,
fl6.saddr = src_in->sin6_addr;
fl6.flowi6_oif = addr->bound_dev_if;

- ret = ipv6_stub->ipv6_dst_lookup(addr->net, NULL, &dst, &fl6);
- if (ret < 0)
- return ret;
+ dst = ipv6_stub->ipv6_dst_lookup_flow(addr->net, NULL, &fl6, NULL);
+ if (IS_ERR(dst))
+ return PTR_ERR(dst);
This leaves the ret variable unused, so I deleted it.

[...]
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index ff33f498c137..035cd7dc3836 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -961,6 +961,13 @@ int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst,
struct flowi6 *fl6);
struct dst_entry *ip6_dst_lookup_flow(const struct sock *sk, struct flowi6 *fl6,
const struct in6_addr *final_dst);
+
+static inline struct dst_entry *ip6_dst_lookup_flow_net(struct net *ign, const struct sock *sk, struct flowi6 *fl6,
+ const struct in6_addr *final_dst)
+{
+ return ip6_dst_lookup_flow(sk, fl6, final_dst);
+}
+
I think we should pick commit c4e85f73afb6 "net: ipv6: add net argument
to ip6_dst_lookup_flow" first instead of adding this adapter. It is
explicitly described as preparation for this fix.

[...]
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -190,6 +190,14 @@ static int tipc_udp_xmit(struct net *net, struct sk_buff *skb,
.saddr = src->ipv6,
.flowi6_proto = IPPROTO_UDP
};
+ ndst = ipv6_stub->ipv6_dst_lookup_flow(net,
+ ub->ubsock->sk,
+ &fl6, NULL);
+ if (IS_ERR(ndst)) {
+ err = PTR_ERR(ndst);
+ goto tx_error;
+ }
+
err = ipv6_stub->ipv6_dst_lookup(net, ub->ubsock->sk, &ndst,
&fl6);
if (err)
You've not deleted the call to the old ipv6_dst_lookup operation here.

The mlx5_en driver *does* use the ipv6_dst_lookup operation in 4.19 so
it should be converted to ipv6_dst_lookup_flow. The relevant code is
in drivers/net/ethernet/mellanox/mlx5/core/en_tc.c.

Ben.

--
Ben Hutchings, Software Developer Codethink Ltd
https://www.codethink.co.uk/ Dale House, 35 Dale Street
Manchester, M1 2HF, United Kingdom


Re: realtime on de0-nano bisection

Pavel Machek
 

Hi!

From: cip-dev <cip-dev-bounces@lists.cip-project.org> On Behalf Of Chris
Paterson
Sent: 19 March 2020 11:23

Hello Pavel,

From: Pavel Machek <pavel@denx.de>
Sent: 19 March 2020 11:05
[...]
like tests are unreliable (and even my basic assumptions may be worth
re-testing).

Can you help? I'll be away from console for a few hours now.
I'll get bisecting.
Last 'good' patch is: 2089f853a8c3 ("drm/i915: disable tracing on
-RT")
The first 'bad' path is: c82fe0af5e58 ("drm/i915: skip
DRM_I915_LOW_LEVEL_TRACEPOINTS with NOTRACE")

Don't ask me why c82fe0af5e58 causes a boot issue on the de0-nano
board but at least it's a starting point for you.
[...]

When bisection finds a commit touching code that you're not even
building, the answer should not be "don't ask me why" but "this is not
a reproducible bug".
That's my job, I guess. I asked for bisect and got bisect
(thanks!). And yes, I have to agree:

In the meantime:

https://gitlab.com/cip-project/cip-kernel/linux-cip/-/jobs/478548891
https://lava.ciplatform.org/scheduler/job/13037

So yes, it seems this is not reproducible. Is it easy to make the test
run .. say 5 times?

I'm starting to suspect

pick fc9f4631a290 irqwork: push most work into softirq context

Best regards,
Pavel
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany


Re: Linux-cip: Kselftest plans

Ben Hutchings <ben.hutchings@...>
 

On Tue, 2020-03-17 at 13:30 +0530, vijai kumar wrote:
On Tue, Mar 17, 2020 at 4:19 AM <nobuhiro1.iwamatsu@toshiba.co.jp> wrote:
[...]
I am now implementing LAVA's kselftest. This kselftest uses kseflftest included in the latest kernel.
There are no plans to backport tests to 4.4 or 4.19. I believe that ksefltest included in the CIP kernel
is inadequate in function and difficult to use as it is.
I suggest using a new kernel test that incorporates the latest tests.
Thank you Nobuhiro-San. Our original idea was to use the kselftest
from 4.19/4.4 cip tree. We faced some issues with
out-of-tree compilation while debianizing it. Also we faced some
compilation issues.

If that is the case, that we are going to use kselftest from the
latest kernel, how can we track the kselftest binaries for a
particular
cip kernel release? I am not sure if all the test cases would pass for
4.19/4/4. Do you have any plans to maintain a branch and release
kselftest binaries and/or testcases that have been tested with a
particular cip kernel release?
Some self-tests will fail on older kernel versions due to missing
features or bugs that might not be practically fixable. Test cases can
report "skip" rather than "fail" for missing features, but this is not
done consistently.

The way I've used kselftest with stable branches has been to look for
regressions rather than any failures. The Linaro folks are doing that
(reporting regressions only) when sending test results to the stable
list, but I don't know how or how much they have automated that.

Ben.

--
Ben Hutchings, Software Developer Codethink Ltd
https://www.codethink.co.uk/ Dale House, 35 Dale Street
Manchester, M1 2HF, United Kingdom


Re: realtime on de0-nano bisection

Ben Hutchings <ben.hutchings@...>
 

On Thu, 2020-03-19 at 16:13 +0000, Chris Paterson wrote:
Hi Pavel,

From: cip-dev <cip-dev-bounces@lists.cip-project.org> On Behalf Of Chris
Paterson
Sent: 19 March 2020 11:23

Hello Pavel,

From: Pavel Machek <pavel@denx.de>
Sent: 19 March 2020 11:05
[...]
like tests are unreliable (and even my basic assumptions may be worth
re-testing).

Can you help? I'll be away from console for a few hours now.
I'll get bisecting.
Last 'good' patch is: 2089f853a8c3 ("drm/i915: disable tracing on
-RT")
The first 'bad' path is: c82fe0af5e58 ("drm/i915: skip
DRM_I915_LOW_LEVEL_TRACEPOINTS with NOTRACE")

Don't ask me why c82fe0af5e58 causes a boot issue on the de0-nano
board but at least it's a starting point for you.
[...]

When bisection finds a commit touching code that you're not even
building, the answer should not be "don't ask me why" but "this is not
a reproducible bug".

Ben.

--
Ben Hutchings, Software Developer Codethink Ltd
https://www.codethink.co.uk/ Dale House, 35 Dale Street
Manchester, M1 2HF, United Kingdom


Re: realtime on de0-nano bisection

Chris Paterson
 

Hi Pavel,

From: cip-dev <cip-dev-bounces@lists.cip-project.org> On Behalf Of Chris
Paterson
Sent: 19 March 2020 11:23

Hello Pavel,

From: Pavel Machek <pavel@denx.de>
Sent: 19 March 2020 11:05

Hi!

I'm fighting with realtime on de0-nano, and I could use some
help... locating the bad commit. I don't seem to know enough about
test infrastructure to be effective. I pushed a tree I'm interested in
to:

https://gitlab.com/cip-project/cip-kernel/linux-cip/tree/ci/pavel/linux-cip

And I believe regression is somewhere in there. I just don't know
where.
What Kernel config are you using?


List of commits is below. I believe 4.19.106-cip21 is okay while
4.19.106-cip21 is bad, and I have done some tests, but now it looks
Do you mean 4.19.106-rt44 Is bad?

like tests are unreliable (and even my basic assumptions may be worth
re-testing).

Can you help? I'll be away from console for a few hours now.
I'll get bisecting.
Last 'good' patch is: 2089f853a8c3 ("drm/i915: disable tracing on -RT")
The first 'bad' path is: c82fe0af5e58 ("drm/i915: skip DRM_I915_LOW_LEVEL_TRACEPOINTS with NOTRACE")

Don't ask me why c82fe0af5e58 causes a boot issue on the de0-nano board but at least it's a starting point for you.

Kind regards, Chris


Regards, Chris


Thanks and best regards,
                                                              Pavel



b4.19.106-rt-on-top

OK 122874576 0bf4ec5b1b8419e1c67a72182ee8d9b8d4a9337b 4.19.106-
cip21
pick f1b053325784 ARM: at91: add TCB registers definitions
pick 48341c7208c6 clocksource/drivers: Add a new driver for the Atmel ARM
TC
blocks
pick 8ea74284f0da clocksource/drivers: timer-atmel-tcb: add clockevent
device
on separate channel
pick 5429f0da23be clocksource/drivers: atmel-pit: make option silent
pick 6477898a723c ARM: at91: Implement clocksource selection
pick 52cdb2289480 ARM: configs: at91: use new TCB timer driver
pick 805b059109fa ARM: configs: at91: unselect PIT
pick d400fa638fcc irqchip/gic-v3-its: Move pending table allocation to init time
pick 9310dd1ca83f kthread: convert worker lock to raw spinlock
pick 11024c8759f2 crypto: caam/qi - simplify CGR allocation, freeing
pick e08c2614be3c sched/fair: Robustify CFS-bandwidth timer locking
pick 1b7c0e7aeb78 arm: Convert arm boot_lock to raw
pick da304dd749c0 x86/ioapic: Don't let setaffinity unmask threaded EOI
interrupt too early
pick efec2cbaa31b cgroup: use irqsave in cgroup_rstat_flush_locked()
pick 360801bc5876 fscache: initialize cookie hash table raw spinlocks
pick 9368b25dc6fa Drivers: hv: vmbus: include header for get_irq_regs()
pick 547927a23a72 percpu: include irqflags.h for raw_local_irq_save()
pick 2248f827f7d8 efi: Allow efi=runtime
pick a540fae71a61 x86/efi: drop task_lock() from efi_switch_mm()
pick 090e0c2d3c51 arm64: KVM: compute_layout before altenates are applied
pick a9e8d619b732 of: allocate / free phandle cache outside of the
devtree_lock
pick 8bd06913a981 mm/kasan: make quarantine_lock a raw_spinlock_t
pick 47251e12064c EXP rcu: Revert expedited GP parallelization cleverness
pick 1848cf1f8210 kmemleak: Turn kmemleak_lock to raw spinlock on RT
pick 8571ad3b1f02 NFSv4: replace seqcount_t with a seqlock_t
pick a16f287d8bbb kernel: sched: Provide a pointer to the valid CPU mask
pick a10c47495dbd kernel/sched/core: add migrate_disable()
pick 73201d580f10 sched/migrate_disable: Add export_symbol_gpl for
__migrate_disabled
pick 6357e0136e18 arm: at91: do not disable/enable clocks in a row
pick d2df59c13604 clocksource: TCLIB: Allow higher clock rates for clock
events
pick 407b62737bc0 timekeeping: Split jiffies seqlock
pick 45e6903195c3 signal: Revert ptrace preempt magic
pick f64b620f24da net: sched: Use msleep() instead of yield()
pick 54eb2ef14895 dm rq: remove BUG_ON(!irqs_disabled) check
pick 2afd479fba8e usb: do no disable interrupts in giveback
pick ab55ba1c34b2 rt: Provide PREEMPT_RT_BASE config switch
pick c0619fc60437 cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT
pick f8682758dc6d jump-label: disable if stop_machine() is used
pick b56cc7361cd8 kconfig: Disable config options which are not RT
compatible
pick 1fda74e8a3e1 lockdep: disable self-test
pick f14436ae5581 mm: Allow only slub on RT
pick e4fb4a8d3396 locking: Disable spin on owner for RT
pick 47ad6acb6f1c rcu: Disable RCU_FAST_NO_HZ on RT
pick c825f6367871 rcu: make RCU_BOOST default on RT
pick 85f3409e8999 sched: Disable CONFIG_RT_GROUP_SCHED on RT
pick 804494b45253 net/core: disable NET_RX_BUSY_POLL
pick a53930db0419 arm*: disable NEON in kernel mode
pick b487b0f3edd3 powerpc: Use generic rwsem on RT
pick deac43aa4a58 powerpc/kvm: Disable in-kernel MPIC emulation for
PREEMPT_RT_FULL
pick 9faa800cc8b8 powerpc: Disable highmem on RT
pick b51fe0939f41 mips: Disable highmem on RT
pick 30352c4f0ae4 x86: Use generic rwsem_spinlocks on -rt
pick a794e1ee2f1b leds: trigger: disable CPU trigger on -RT
pick f06b569ea39e cpufreq: drop K8's driver from beeing selected
pick 5fc3818dffbb md: disable bcache
pick a5f2f8f428a9 efi: Disable runtime services on RT
pick 446b178b5c4b printk: Add a printk kill switch
pick 290020fb828c printk: Add "force_early_printk" boot param to help with
debugging
pick 41538af60819 preempt: Provide preempt_*_(no)rt variants
pick 3ae2dfc3a6e2 futex: workaround migrate_disable/enable in different
context
pick 8d271d63aa99 rt: Add local irq locks
pick 8f3ec1753f29 locallock: provide {get,put}_locked_ptr() variants
pick 83a11c32c1cf mm/scatterlist: Do not disable irqs on RT
pick 212b91e0dcb7 signal/x86: Delay calling signals in atomic
pick 91f375350d13 x86/signal: delay calling signals on 32bit
pick ef59f07235f3 buffer_head: Replace bh_uptodate_lock for -rt
pick 157d3af892d4 fs: jbd/jbd2: Make state lock and journal head lock rt safe
pick f83b8474e67e list_bl: Make list head locking RT safe
pick 0d7769b9e6d7 list_bl: fixup bogus lockdep warning
pick 23d976598fca genirq: Disable irqpoll on -rt
pick f482480c8949 genirq: Force interrupt thread on RT
pick cdd0a6dd6cf5 Split IRQ-off and zone->lock while freeing pages from PCP
list
#1
pick 238c26eca475 Split IRQ-off and zone->lock while freeing pages from PCP
list #2
pick 9a2a5e8e197a mm/SLxB: change list_lock to raw_spinlock_t
pick cb8ddb1408a1 mm/SLUB: delay giving back empty slubs to IRQ enabled
regions
pick 20228b9ad4cc mm: page_alloc: rt-friendly per-cpu pages
pick fe4307778243 mm/swap: Convert to percpu locked
pick 6f7bced91911 mm: perform lru_add_drain_all() remotely
pick 8cbb64035ad9 mm/vmstat: Protect per cpu variables with preempt
disable
on RT
pick 639a673966b9 ARM: Initialize split page table locks for vector page
pick 0acf1cae0903 mm: Enable SLUB for RT
pick b50af682f2b7 slub: Enable irqs for __GFP_WAIT
pick 119281aade10 slub: Disable SLUB_CPU_PARTIAL
pick 8d00c57c199b mm/memcontrol: Don't call schedule_work_on in
preemption disabled context
pick 1c3d8875431d mm/memcontrol: Replace local_irq_disable with local
locks
pick 19d8df024e2f mm/zsmalloc: copy with get_cpu_var() and locking
pick 58ab0072e464 x86/mm/pat: disable preemption __split_large_page()
after
spin_lock()
pick 68e40ee25e47 radix-tree: use local locks
pick 1a895e4d2468 timers: Prepare for full preemption
pick c03f3c65c426 x86: kvm Require const tsc for RT
pick 8c6fe368e93c pci/switchtec: Don't use completion's wait queue
pick 6ca0461b044c wait.h: include atomic.h
pick 7bf61e8d3fef work-simple: Simple work queue implemenation
pick 2799256f569f work-simple: drop a shit statement in
SWORK_EVENT_PENDING
pick 102f6d1ac234 completion: Use simple wait queues
pick 47b3101f3d3c fs/aio: simple simple work
pick 7d2ab042333b genirq: Do not invoke the affinity callback via a workqueue
on RT
pick 25088eb2a4eb time/hrtimer: avoid schedule_work() with interrupts
disabled
pick 5b9f64173e94 hrtimer: consolidate hrtimer_init() + hrtimer_init_sleeper()
calls
pick 32ea9ed16efe hrtimers: Prepare full preemption
pick 9a1897cecdf6 hrtimer: by timers by default into the softirq context
pick b77213918ed5 sched/fair: Make the hrtimers non-hard again
pick e4d973f6534a hrtimer: Move schedule_work call to helper thread
pick 1f9f089947fc hrtimer: move state change before hrtimer_cancel in
do_nanosleep()
pick f7e40a8d672b posix-timers: Thread posix-cpu-timers on -rt
pick 57c7cc8173dc sched: Move task_struct cleanup to RCU
pick e754db200003 sched: Limit the number of task migrations per batch
pick 1f870d384a18 sched: Move mmdrop to RCU on RT
pick daf050c81744 kernel/sched: move stack + kprobe clean up to
__put_task_struct()
pick fa37473e6dba sched: Add saved_state for tasks blocked on sleeping locks
pick 2f85b7585307 sched: Do not account rcu_preempt_depth on RT in
might_sleep()
pick e3858ec6e217 sched: Use the proper LOCK_OFFSET for cond_resched()
pick ca1333aa370e sched: Disable TTWU_QUEUE on RT
pick 16f42ccd7684 sched/workqueue: Only wake up idle workers if not blocked
on sleeping spin lock
pick bf8f0c64f67d rt: Increase/decrease the nr of migratory tasks when
enabling/disabling migration
pick e06c269c2652 hotplug: Lightweight get online cpus
pick f2e100b9f722 trace: Add migrate-disabled counter to tracing output
pick c4429f1e6c31 lockdep: Make it RT aware
pick 4c99a296d07e tasklet: Prevent tasklets from going into infinite spin in RT
pick 534dacca039e softirq: Check preemption after reenabling interrupts
pick 3a729860bc98 softirq: Disable softirq stacks for RT
pick 96a086038771 softirq: Split softirq locks
pick 618155302c43 net/core: use local_bh_disable() in netif_rx_ni()
pick 83a8d2a52ca3 genirq: Allow disabling of softirq processing in irq thread
context
pick 3487fb436997 softirq: split timer softirqs out of ksoftirqd
pick f774fa3fcce1 softirq: Avoid "local_softirq_pending" messages if ksoftirqd
is
blocked
pick df000153612e softirq: Avoid "local_softirq_pending" messages if task is in
cpu_chill()
pick f6c58cb3103a rtmutex: trylock is okay on -RT
pick 9548e282eb13 fs/nfs: turn rmdir_sem into a semaphore
pick a8fd0847fc2f rtmutex: Handle the various new futex race conditions
pick 35bce82bb299 futex: Fix bug on when a requeued RT task times out
pick a955c20a684c futex: Ensure lock/unlock symetry versus pi_lock and hash
bucket lock
pick 26a04c6463c1 pid.h: include atomic.h
pick cdcef3c3c000 arm: include definition for cpumask_t
pick 3bca4d9be9ac locking: locktorture: Do NOT include rwlock.h directly
pick 42782ac504d4 rtmutex: Add rtmutex_lock_killable()
pick 2c8595a53cd4 rtmutex: Make lock_killable work
pick 23b3ca2280af spinlock: Split the lock types header
pick 5f60c6ae6dde rtmutex: Avoid include hell
pick 995ecbc4c0d3 rbtree: don't include the rcu header
pick 27e9eb247033 rtmutex: Provide rt_mutex_slowlock_locked()
pick a468d3437296 rtmutex: export lockdep-less version of rt_mutex's lock,
trylock and unlock
pick 58790944fce8 rtmutex: add sleeping lock implementation
pick 052a52983b60 rtmutex: add mutex implementation based on rtmutex
pick b4235746586d rtmutex: add rwsem implementation based on rtmutex
pick 24d8016ec9e5 rtmutex: add rwlock implementation based on rtmutex
OK 122889823 pick e5c0eab8e437 rtmutex/rwlock: preserve state like a
sleeping
lock
pick 3bc0aceff337 rtmutex: wire up RT's locking
pick a7d5da8792ca rtmutex: add ww_mutex addon for mutex-rt
pick f9bde2392945 kconfig: Add PREEMPT_RT_FULL
pick 574150d18d52 locking/rt-mutex: fix deadlock in device mapper / block-IO
pick fabe7e1f9cc8 locking/rt-mutex: Flush block plug on __down_read()
pick 461cea5862c2 locking/rtmutex: re-init the wait_lock in
rt_mutex_init_proxy_locked()
pick 17dc818f1b09 ptrace: fix ptrace vs tasklist_lock race
pick e4eb4b5f10c3 rtmutex: annotate sleeping lock context
pick 833397adc966 sched/migrate_disable: fallback to preempt_disable()
instead barrier()
pick a08b762ef304 locking: don't check for __LINUX_SPINLOCK_TYPES_H on -
RT
archs
pick 6cb3f91b9265 rcu: Frob softirq test
pick 050e3ab7293e rcu: Merge RCU-bh into RCU-preempt
pick d1f13f5715ff rcu: Make ksoftirqd do RCU quiescent states
pick 68e8f96963a0 rcu: Eliminate softirq processing from rcutree
pick c107e3408262 srcu: use cpu_online() instead custom check
pick 80dd78936722 srcu: replace local_irqsave() with a locallock
pick a1ea3f3b5d80 rcu: enable rcu_normal_after_boot by default for RT
pick 6e1f123fe270 tty/serial/omap: Make the locking RT aware
pick 53a1138616f2 tty/serial/pl011: Make the locking work on RT
pick f9f8eec35d32 tty: serial: pl011: explicitly initialize the flags variable
pick 846b95cf90a9 rt: Improve the serial console PASS_LIMIT
pick cd9897a02ce8 tty: serial: 8250: don't take the trylock during oops
pick 4d83234e6b83 locking/percpu-rwsem: Remove preempt_disable variants
pick 6c8fe3277d4b mm: Protect activate_mm() by
preempt_[disable&enable]_rt()
pick 224aa887839e fs/dcache: bring back explicit INIT_HLIST_BL_HEAD init
pick a19ccfffd6fe fs/dcache: disable preemption on i_dir_seq's write side
pick 242dc74c7ba0 squashfs: make use of local lock in multi_cpu
decompressor
pick efae64412664 thermal: Defer thermal wakups to threads
pick bd6193758b42 x86/fpu: Disable preemption around local_bh_disable()
pick 57754daf7ab5 fs/epoll: Do not disable preemption on RT
pick 5ba09ebcdb9d mm/vmalloc: Another preempt disable region which sucks
pick 2a14fc037798 block: mq: use cpu_light()
pick 44cb8f829fe8 block/mq: do not invoke preempt_disable()
pick 1a0cbc8049b7 block/mq: don't complete requests via IPI
pick 7e2a9e291159 md: raid5: Make raid5_percpu handling RT aware
pick 41f7be6a0bf6 rt: Introduce cpu_chill()
pick b4dc21395a7d hrtimer: Don't lose state in cpu_chill()
pick fd29abae38fa hrtimer: cpu_chill(): save task state in ->saved_state()
pick a7edd04c85ab block: blk-mq: move blk_queue_usage_counter_release()
into process context
pick 10c92f60395f block: Use cpu_chill() for retry loops
pick 68d5f72f6c39 fs: dcache: Use cpu_chill() in trylock loops
pick 7c5378410371 net: Use cpu_chill() instead of cpu_relax()
pick 96b93ac4f9ec fs/dcache: use swait_queue instead of waitqueue
pick 0d6428e557f2 workqueue: Use normal rcu
pick 46cdd4ce2bb4 workqueue: Use local irq lock instead of irq disable regions
pick e4771b3b1d75 workqueue: Prevent workqueue versus ata-piix livelock
pick 7f4d1437fd83 sched: Distangle worker accounting from rqlock
pick de5794c17deb debugobjects: Make RT aware
pick 5335646d22e8 seqlock: Prevent rt starvation
pick e533ff2a5246 sunrpc: Make svc_xprt_do_enqueue() use get_cpu_light()
pick 5e479879d1ce net: Use skbufhead with raw lock
pick b47b2fbf67cc net: move xmit_recursion to per-task variable on -RT
pick bd774d290977 net: provide a way to delegate processing a softirq to
ksoftirqd
pick 2f116045c3f1 net: dev: always take qdisc's busylock in __dev_xmit_skb()
pick 29dbfaac29c5 net/Qdisc: use a seqlock instead seqcount
pick c7968ed6b615 net: add back the missing serialization in
ip_send_unicast_reply()
pick e5113ce66c06 net: add a lock around icmp_sk()
pick 2432ee4bae6c net: Have __napi_schedule_irqoff() disable interrupts on
RT
pick fc9f4631a290 irqwork: push most work into softirq context
pick 04a1e1f2aa0d printk: Make rt aware
pick db508d28536f kernel/printk: Don't try to print from IRQ/NMI region
pick 502f80cc6396 printk: Drop the logbuf_lock more often
pick 1f904a831f47 ARM: enable irq in translation/section permission fault
handlers
pick d57873234f4e genirq: update irq_set_irqchip_state documentation
pick 1587d9b527d1 KVM: arm/arm64: downgrade preempt_disable()d region
to
migrate_disable()
pick 9ad729bda0ad arm64: fpsimd: use preemp_disable in addition to
local_bh_disable()
pick 9ea835e7e222 kgdb/serial: Short term workaround
pick 0def4cfed4bc sysfs: Add /sys/kernel/realtime entry
pick d6559d05ba28 mm, rt: kmap_atomic scheduling
pick 172af478fc0a x86/highmem: Add a "already used pte" check
pick aedd824e87cb arm/highmem: Flush tlb on unmap
pick 9e106bc3892f arm: Enable highmem for rt
pick 94434f02bd40 scsi/fcoe: Make RT aware.
pick 663928d94580 x86: crypto: Reduce preempt disabled regions
pick 9e1183c96782 crypto: Reduce preempt disabled regions, more algos
pick 6960b353f03e crypto: limit more FPU-enabled sections
pick 685152deb622 crypto: scompress - serialize RT percpu scratch buffer
access
with a local lock
pick 6ac01984f2a0 crypto: cryptd - add a lock instead
preempt_disable/local_bh_disable
pick 83c5815df005 panic: skip get_random_bytes for RT_FULL in init_oops_id
pick 04c6848abe95 x86: stackprotector: Avoid random pool on rt
pick d259cd9b1528 random: Make it work on rt
pick 2330ffd2ea17 cpu/hotplug: Implement CPU pinning
pick f51c291d7a8c sched: Allow pinned user tasks to be awakened to the CPU
they pinned
pick 446d3b598f46 hotplug: duct-tape RT-rwlock usage for non-RT
pick 6fdea4f75772 net: Remove preemption disabling in netif_rx()
pick 33b361abdc67 net: Another local_irq_disable/kmalloc headache
pick 1ed4955c1659 net/core: protect users of napi_alloc_cache against
reentrance
pick 31eac99e4c99 net: netfilter: Serialize xt_write_recseq sections on RT
pick e0e7b52f8feb net: Add a mutex around devnet_rename_seq
pick e21468d9dbb3 lockdep: selftest: Only do hardirq context test for raw
spinlock
pick c98e1e1915e3 lockdep: selftest: fix warnings due to missing PREEMPT_RT
conditionals
pick 1d80dd375f75 sched: Add support for lazy preemption
pick 526627fd4828 ftrace: Fix trace header alignment
pick 150dab4d290c x86: Support for lazy preemption
pick 04dc4533ed20 x86: lazy-preempt: properly check against preempt-mask
pick 4902852b7e48 x86: lazy-preempt: use proper return label on 32bit-x86
OK pick 948b7cfa39b0 arm: Add support for lazy preemption
pick 7628f6397275 powerpc: Add support for lazy preemption
pick 68e2b1f77c5d arch/arm64: Add lazy preempt support
pick 829e7d2af839 connector/cn_proc: Protect send_msg() with a local lock
on
RT
pick bab609040081 drivers/block/zram: Replace bit spinlocks with rtmutex for
-
rt
pick 253dccd9c822 drivers/zram: Don't disable preemption in
zcomp_stream_get/put()
pick 6e581927b8a9 drivers/zram: fix zcomp_stream_get() smp_processor_id()
use in preemptible code
pick a578207ba92a tpm_tis: fix stall after iowrite*()s
pick 5dbe4296d49c watchdog: prevent deferral of watchdogd wakeup on RT
pick 2076de67abf9 drm,radeon,i915: Use preempt_disable/enable_rt() where
recommended
pick 0f3bcd6901e0 drm,i915: Use local_lock/unlock_irq() in
intel_pipe_update_start/end()
pick 2089f853a8c3 drm/i915: disable tracing on -RT
pick c82fe0af5e58 drm/i915: skip DRM_I915_LOW_LEVEL_TRACEPOINTS with
NOTRACE
pick 37925bf71573 cgroups: use simple wait in css_release()
pick c5eda0594d49 cpuset: Convert callback_lock to raw_spinlock_t
pick 756433e002d9 apparmor: use a locallock instead preempt_disable()
pick 73c433d86e25 workqueue: Prevent deadlock/stall on RT
pick 35bc2a5af2fe signals: Allow rt tasks to cache one sigqueue struct
pick 42c2f9cb1122 Add localversion for -RT release
pick 85773be1821e powerpc/pseries/iommu: Use a locallock instead
local_irq_save()
pick 2667064a1f3f powerpc: reshuffle TIF bits
pick 55f7a7895171 tty/sysrq: Convert show_lock to raw_spinlock_t
pick b7cd1dad634c drm/i915: Don't disable interrupts independently of the
lock
pick 066e20ff7b54 sched/completion: Fix a lockup in wait_for_completion()
pick 54498c787596 kthread: add a global worker thread.
pick 80d5e2935a6c genirq: Do not invoke the affinity callback via a workqueue
on RT
pick f9d3f116e098 genirq: Handle missing work_struct in
irq_set_affinity_notifier()
pick e2c1e143e74a arm: imx6: cpuidle: Use raw_spinlock_t
OK 122904930 / 122959477 pick 69aa73357e6a rcu: Don't allow to change
rcu_normal_after_boot on RT
bad? 122951549 bad? 126355890 real failure when entering usersace pick
849ef8789077 pci/switchtec: fix stream_open.cocci warnings
pick ad8a5e8279c4 sched/core: Drop a preempt_disable_rt() statement
bad? 122942465 pick 966f066d96cb timers: Redo the notification of canceling
timers on -RT
pick 0393fd5a4f9a Revert "futex: Ensure lock/unlock symetry versus pi_lock
and
hash bucket lock"
pick 84eb0b64a27a Revert "futex: Fix bug on when a requeued RT task times
out"
pick fcc893280f4e Revert "rtmutex: Handle the various new futex race
conditions"
pick 2eac93cf9d16 Revert "futex: workaround migrate_disable/enable in
different context"
pick 9b8964629f4f futex: Make the futex_hash_bucket lock raw
pick cc1812bf198b futex: Delay deallocation of pi_state
bad? pick f5e115c43100 mm/zswap: Do not disable preemption in
zswap_frontswap_store()
pick e0d0d09a08ad revert-aio
pick a0a40bfb4300 fs/aio: simple simple work
pick 0fae581d8c5e revert-thermal
pick c0d95b4a8a1b thermal: Defer thermal wakups to threads
pick 700fbb4afb6e revert-block
pick 4cda50ff12cf block: blk-mq: move blk_queue_usage_counter_release()
into
process context
pick 9e982f55745b workqueue: rework
pick c0db53dc3bf4 i2c: exynos5: Remove IRQF_ONESHOT
pick 1f160d170203 i2c: hix5hd2: Remove IRQF_ONESHOT
BAD 122882826 eae5a7cab722 sched/deadline: Ensure inactive_timer runs in
hardirq context
pick 6249683b77f6 thermal/x86_pkg_temp: make pkg_temp_lock a raw
spinlock
pick 956a5c214a5b dma-buf: Use seqlock_t instread disabling preemption
pick 94f6fa62de56 KVM: arm/arm64: Let the timer expire in hardirq context on
RT
pick b1a74023533a x86: preempt: Check preemption level before looking at
lazy-preempt
pick 1bdbd966d713 hrtimer: Use READ_ONCE to access timer->base in
hrimer_grab_expiry_lock()
pick b87859791ff6 hrtimer: Don't grab the expiry lock for non-soft hrtimer
pick cc6c170874b9 hrtimer: Prevent using hrtimer_grab_expiry_lock() on
migration_base
pick d5b21b1a259f hrtimer: Add a missing bracket and hide `migration_base'
on
!SMP
pick 6bc5d45d9c6f posix-timers: Unlock expiry lock in the early return
pick 05c2db84cb7a sched: migrate_dis/enable: Use sleeping_lock…() to
annotate sleeping points
pick c282770121a7 sched: __set_cpus_allowed_ptr: Check cpus_mask, not
cpus_ptr
pick e4f2a78d7ddb sched: Remove dead __migrate_disabled() check
pick 1a7d39dc51d2 sched: migrate disable: Protect cpus_ptr with lock
pick dda8037814c5 lib/smp_processor_id: Don't use cpumask_equal()
pick a7307f4e5926 futex: Make the futex_hash_bucket spinlock_t again and
bring back its old state
pick dad5e45d6919 locking/rtmutex: Clean ->pi_blocked_on in the error case
pick de2975927caf lib/ubsan: Don't seralize UBSAN report
pick 48b199bebe5c kmemleak: Change the lock of kmemleak_object to
raw_spinlock_t
pick 7a67c9eb660a sched: migrate_enable: Use select_fallback_rq()
pick 46f7b9689c65 sched: Lazy migrate_disable processing
pick 7bcbdecb866e sched: migrate_enable: Use stop_one_cpu_nowait()
pick 0c78796b3b3c Revert "ARM: Initialize split page table locks for vector
page"
pick 984f60beac6e locking: Make spinlock_t and rwlock_t a RCU section on RT
pick bdaac02765af sched/core: migrate_enable() must access
takedown_cpu_task on !HOTPLUG_CPU
pick 041a0825cc80 lib/smp_processor_id: Adjust check_preemption_disabled()
pick 0aafa6ab4265 sched: migrate_enable: Busy loop until the migration
request
is completed
pick 08447476459e Linux 4.19.106-rt44 REBASE


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DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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Re: realtime on de0-nano bisection

Chris Paterson
 

Hi Pavel,

From: cip-dev <cip-dev-bounces@lists.cip-project.org> On Behalf Of Chris
Paterson
Sent: 19 March 2020 11:23

Hello Pavel,

From: Pavel Machek <pavel@denx.de>
Sent: 19 March 2020 11:05

Hi!

I'm fighting with realtime on de0-nano, and I could use some
help... locating the bad commit. I don't seem to know enough about
test infrastructure to be effective. I pushed a tree I'm interested in
to:

https://gitlab.com/cip-project/cip-kernel/linux-cip/tree/ci/pavel/linux-cip

And I believe regression is somewhere in there. I just don't know
where.
What Kernel config are you using?


List of commits is below. I believe 4.19.106-cip21 is okay while
4.19.106-cip21 is bad, and I have done some tests, but now it looks
Do you mean 4.19.106-rt44 Is bad?

like tests are unreliable (and even my basic assumptions may be worth
re-testing).

Can you help? I'll be away from console for a few hours now.
I'll get bisecting.
FYI, if it's only one build/test config you're interested in, you can save time/compute by modifying the .gitlab-ci.yml file in your tree.
See an example here:
https://gitlab.com/cip-project/cip-kernel/linux-cip/-/commit/00c82fbb4ab13854e28a9b4dde5699817c3a58c1

I'll be using this in conjunction with git bisect and see if we can identify the issue.

Kind regards, Chris


Regards, Chris


Thanks and best regards,
                                                              Pavel



b4.19.106-rt-on-top

OK 122874576 0bf4ec5b1b8419e1c67a72182ee8d9b8d4a9337b 4.19.106-
cip21
pick f1b053325784 ARM: at91: add TCB registers definitions
pick 48341c7208c6 clocksource/drivers: Add a new driver for the Atmel ARM
TC
blocks
pick 8ea74284f0da clocksource/drivers: timer-atmel-tcb: add clockevent
device
on separate channel
pick 5429f0da23be clocksource/drivers: atmel-pit: make option silent
pick 6477898a723c ARM: at91: Implement clocksource selection
pick 52cdb2289480 ARM: configs: at91: use new TCB timer driver
pick 805b059109fa ARM: configs: at91: unselect PIT
pick d400fa638fcc irqchip/gic-v3-its: Move pending table allocation to init time
pick 9310dd1ca83f kthread: convert worker lock to raw spinlock
pick 11024c8759f2 crypto: caam/qi - simplify CGR allocation, freeing
pick e08c2614be3c sched/fair: Robustify CFS-bandwidth timer locking
pick 1b7c0e7aeb78 arm: Convert arm boot_lock to raw
pick da304dd749c0 x86/ioapic: Don't let setaffinity unmask threaded EOI
interrupt too early
pick efec2cbaa31b cgroup: use irqsave in cgroup_rstat_flush_locked()
pick 360801bc5876 fscache: initialize cookie hash table raw spinlocks
pick 9368b25dc6fa Drivers: hv: vmbus: include header for get_irq_regs()
pick 547927a23a72 percpu: include irqflags.h for raw_local_irq_save()
pick 2248f827f7d8 efi: Allow efi=runtime
pick a540fae71a61 x86/efi: drop task_lock() from efi_switch_mm()
pick 090e0c2d3c51 arm64: KVM: compute_layout before altenates are applied
pick a9e8d619b732 of: allocate / free phandle cache outside of the
devtree_lock
pick 8bd06913a981 mm/kasan: make quarantine_lock a raw_spinlock_t
pick 47251e12064c EXP rcu: Revert expedited GP parallelization cleverness
pick 1848cf1f8210 kmemleak: Turn kmemleak_lock to raw spinlock on RT
pick 8571ad3b1f02 NFSv4: replace seqcount_t with a seqlock_t
pick a16f287d8bbb kernel: sched: Provide a pointer to the valid CPU mask
pick a10c47495dbd kernel/sched/core: add migrate_disable()
pick 73201d580f10 sched/migrate_disable: Add export_symbol_gpl for
__migrate_disabled
pick 6357e0136e18 arm: at91: do not disable/enable clocks in a row
pick d2df59c13604 clocksource: TCLIB: Allow higher clock rates for clock
events
pick 407b62737bc0 timekeeping: Split jiffies seqlock
pick 45e6903195c3 signal: Revert ptrace preempt magic
pick f64b620f24da net: sched: Use msleep() instead of yield()
pick 54eb2ef14895 dm rq: remove BUG_ON(!irqs_disabled) check
pick 2afd479fba8e usb: do no disable interrupts in giveback
pick ab55ba1c34b2 rt: Provide PREEMPT_RT_BASE config switch
pick c0619fc60437 cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT
pick f8682758dc6d jump-label: disable if stop_machine() is used
pick b56cc7361cd8 kconfig: Disable config options which are not RT
compatible
pick 1fda74e8a3e1 lockdep: disable self-test
pick f14436ae5581 mm: Allow only slub on RT
pick e4fb4a8d3396 locking: Disable spin on owner for RT
pick 47ad6acb6f1c rcu: Disable RCU_FAST_NO_HZ on RT
pick c825f6367871 rcu: make RCU_BOOST default on RT
pick 85f3409e8999 sched: Disable CONFIG_RT_GROUP_SCHED on RT
pick 804494b45253 net/core: disable NET_RX_BUSY_POLL
pick a53930db0419 arm*: disable NEON in kernel mode
pick b487b0f3edd3 powerpc: Use generic rwsem on RT
pick deac43aa4a58 powerpc/kvm: Disable in-kernel MPIC emulation for
PREEMPT_RT_FULL
pick 9faa800cc8b8 powerpc: Disable highmem on RT
pick b51fe0939f41 mips: Disable highmem on RT
pick 30352c4f0ae4 x86: Use generic rwsem_spinlocks on -rt
pick a794e1ee2f1b leds: trigger: disable CPU trigger on -RT
pick f06b569ea39e cpufreq: drop K8's driver from beeing selected
pick 5fc3818dffbb md: disable bcache
pick a5f2f8f428a9 efi: Disable runtime services on RT
pick 446b178b5c4b printk: Add a printk kill switch
pick 290020fb828c printk: Add "force_early_printk" boot param to help with
debugging
pick 41538af60819 preempt: Provide preempt_*_(no)rt variants
pick 3ae2dfc3a6e2 futex: workaround migrate_disable/enable in different
context
pick 8d271d63aa99 rt: Add local irq locks
pick 8f3ec1753f29 locallock: provide {get,put}_locked_ptr() variants
pick 83a11c32c1cf mm/scatterlist: Do not disable irqs on RT
pick 212b91e0dcb7 signal/x86: Delay calling signals in atomic
pick 91f375350d13 x86/signal: delay calling signals on 32bit
pick ef59f07235f3 buffer_head: Replace bh_uptodate_lock for -rt
pick 157d3af892d4 fs: jbd/jbd2: Make state lock and journal head lock rt safe
pick f83b8474e67e list_bl: Make list head locking RT safe
pick 0d7769b9e6d7 list_bl: fixup bogus lockdep warning
pick 23d976598fca genirq: Disable irqpoll on -rt
pick f482480c8949 genirq: Force interrupt thread on RT
pick cdd0a6dd6cf5 Split IRQ-off and zone->lock while freeing pages from PCP
list
#1
pick 238c26eca475 Split IRQ-off and zone->lock while freeing pages from PCP
list #2
pick 9a2a5e8e197a mm/SLxB: change list_lock to raw_spinlock_t
pick cb8ddb1408a1 mm/SLUB: delay giving back empty slubs to IRQ enabled
regions
pick 20228b9ad4cc mm: page_alloc: rt-friendly per-cpu pages
pick fe4307778243 mm/swap: Convert to percpu locked
pick 6f7bced91911 mm: perform lru_add_drain_all() remotely
pick 8cbb64035ad9 mm/vmstat: Protect per cpu variables with preempt
disable
on RT
pick 639a673966b9 ARM: Initialize split page table locks for vector page
pick 0acf1cae0903 mm: Enable SLUB for RT
pick b50af682f2b7 slub: Enable irqs for __GFP_WAIT
pick 119281aade10 slub: Disable SLUB_CPU_PARTIAL
pick 8d00c57c199b mm/memcontrol: Don't call schedule_work_on in
preemption disabled context
pick 1c3d8875431d mm/memcontrol: Replace local_irq_disable with local
locks
pick 19d8df024e2f mm/zsmalloc: copy with get_cpu_var() and locking
pick 58ab0072e464 x86/mm/pat: disable preemption __split_large_page()
after
spin_lock()
pick 68e40ee25e47 radix-tree: use local locks
pick 1a895e4d2468 timers: Prepare for full preemption
pick c03f3c65c426 x86: kvm Require const tsc for RT
pick 8c6fe368e93c pci/switchtec: Don't use completion's wait queue
pick 6ca0461b044c wait.h: include atomic.h
pick 7bf61e8d3fef work-simple: Simple work queue implemenation
pick 2799256f569f work-simple: drop a shit statement in
SWORK_EVENT_PENDING
pick 102f6d1ac234 completion: Use simple wait queues
pick 47b3101f3d3c fs/aio: simple simple work
pick 7d2ab042333b genirq: Do not invoke the affinity callback via a workqueue
on RT
pick 25088eb2a4eb time/hrtimer: avoid schedule_work() with interrupts
disabled
pick 5b9f64173e94 hrtimer: consolidate hrtimer_init() + hrtimer_init_sleeper()
calls
pick 32ea9ed16efe hrtimers: Prepare full preemption
pick 9a1897cecdf6 hrtimer: by timers by default into the softirq context
pick b77213918ed5 sched/fair: Make the hrtimers non-hard again
pick e4d973f6534a hrtimer: Move schedule_work call to helper thread
pick 1f9f089947fc hrtimer: move state change before hrtimer_cancel in
do_nanosleep()
pick f7e40a8d672b posix-timers: Thread posix-cpu-timers on -rt
pick 57c7cc8173dc sched: Move task_struct cleanup to RCU
pick e754db200003 sched: Limit the number of task migrations per batch
pick 1f870d384a18 sched: Move mmdrop to RCU on RT
pick daf050c81744 kernel/sched: move stack + kprobe clean up to
__put_task_struct()
pick fa37473e6dba sched: Add saved_state for tasks blocked on sleeping locks
pick 2f85b7585307 sched: Do not account rcu_preempt_depth on RT in
might_sleep()
pick e3858ec6e217 sched: Use the proper LOCK_OFFSET for cond_resched()
pick ca1333aa370e sched: Disable TTWU_QUEUE on RT
pick 16f42ccd7684 sched/workqueue: Only wake up idle workers if not blocked
on sleeping spin lock
pick bf8f0c64f67d rt: Increase/decrease the nr of migratory tasks when
enabling/disabling migration
pick e06c269c2652 hotplug: Lightweight get online cpus
pick f2e100b9f722 trace: Add migrate-disabled counter to tracing output
pick c4429f1e6c31 lockdep: Make it RT aware
pick 4c99a296d07e tasklet: Prevent tasklets from going into infinite spin in RT
pick 534dacca039e softirq: Check preemption after reenabling interrupts
pick 3a729860bc98 softirq: Disable softirq stacks for RT
pick 96a086038771 softirq: Split softirq locks
pick 618155302c43 net/core: use local_bh_disable() in netif_rx_ni()
pick 83a8d2a52ca3 genirq: Allow disabling of softirq processing in irq thread
context
pick 3487fb436997 softirq: split timer softirqs out of ksoftirqd
pick f774fa3fcce1 softirq: Avoid "local_softirq_pending" messages if ksoftirqd
is
blocked
pick df000153612e softirq: Avoid "local_softirq_pending" messages if task is in
cpu_chill()
pick f6c58cb3103a rtmutex: trylock is okay on -RT
pick 9548e282eb13 fs/nfs: turn rmdir_sem into a semaphore
pick a8fd0847fc2f rtmutex: Handle the various new futex race conditions
pick 35bce82bb299 futex: Fix bug on when a requeued RT task times out
pick a955c20a684c futex: Ensure lock/unlock symetry versus pi_lock and hash
bucket lock
pick 26a04c6463c1 pid.h: include atomic.h
pick cdcef3c3c000 arm: include definition for cpumask_t
pick 3bca4d9be9ac locking: locktorture: Do NOT include rwlock.h directly
pick 42782ac504d4 rtmutex: Add rtmutex_lock_killable()
pick 2c8595a53cd4 rtmutex: Make lock_killable work
pick 23b3ca2280af spinlock: Split the lock types header
pick 5f60c6ae6dde rtmutex: Avoid include hell
pick 995ecbc4c0d3 rbtree: don't include the rcu header
pick 27e9eb247033 rtmutex: Provide rt_mutex_slowlock_locked()
pick a468d3437296 rtmutex: export lockdep-less version of rt_mutex's lock,
trylock and unlock
pick 58790944fce8 rtmutex: add sleeping lock implementation
pick 052a52983b60 rtmutex: add mutex implementation based on rtmutex
pick b4235746586d rtmutex: add rwsem implementation based on rtmutex
pick 24d8016ec9e5 rtmutex: add rwlock implementation based on rtmutex
OK 122889823 pick e5c0eab8e437 rtmutex/rwlock: preserve state like a
sleeping
lock
pick 3bc0aceff337 rtmutex: wire up RT's locking
pick a7d5da8792ca rtmutex: add ww_mutex addon for mutex-rt
pick f9bde2392945 kconfig: Add PREEMPT_RT_FULL
pick 574150d18d52 locking/rt-mutex: fix deadlock in device mapper / block-IO
pick fabe7e1f9cc8 locking/rt-mutex: Flush block plug on __down_read()
pick 461cea5862c2 locking/rtmutex: re-init the wait_lock in
rt_mutex_init_proxy_locked()
pick 17dc818f1b09 ptrace: fix ptrace vs tasklist_lock race
pick e4eb4b5f10c3 rtmutex: annotate sleeping lock context
pick 833397adc966 sched/migrate_disable: fallback to preempt_disable()
instead barrier()
pick a08b762ef304 locking: don't check for __LINUX_SPINLOCK_TYPES_H on -
RT
archs
pick 6cb3f91b9265 rcu: Frob softirq test
pick 050e3ab7293e rcu: Merge RCU-bh into RCU-preempt
pick d1f13f5715ff rcu: Make ksoftirqd do RCU quiescent states
pick 68e8f96963a0 rcu: Eliminate softirq processing from rcutree
pick c107e3408262 srcu: use cpu_online() instead custom check
pick 80dd78936722 srcu: replace local_irqsave() with a locallock
pick a1ea3f3b5d80 rcu: enable rcu_normal_after_boot by default for RT
pick 6e1f123fe270 tty/serial/omap: Make the locking RT aware
pick 53a1138616f2 tty/serial/pl011: Make the locking work on RT
pick f9f8eec35d32 tty: serial: pl011: explicitly initialize the flags variable
pick 846b95cf90a9 rt: Improve the serial console PASS_LIMIT
pick cd9897a02ce8 tty: serial: 8250: don't take the trylock during oops
pick 4d83234e6b83 locking/percpu-rwsem: Remove preempt_disable variants
pick 6c8fe3277d4b mm: Protect activate_mm() by
preempt_[disable&enable]_rt()
pick 224aa887839e fs/dcache: bring back explicit INIT_HLIST_BL_HEAD init
pick a19ccfffd6fe fs/dcache: disable preemption on i_dir_seq's write side
pick 242dc74c7ba0 squashfs: make use of local lock in multi_cpu
decompressor
pick efae64412664 thermal: Defer thermal wakups to threads
pick bd6193758b42 x86/fpu: Disable preemption around local_bh_disable()
pick 57754daf7ab5 fs/epoll: Do not disable preemption on RT
pick 5ba09ebcdb9d mm/vmalloc: Another preempt disable region which sucks
pick 2a14fc037798 block: mq: use cpu_light()
pick 44cb8f829fe8 block/mq: do not invoke preempt_disable()
pick 1a0cbc8049b7 block/mq: don't complete requests via IPI
pick 7e2a9e291159 md: raid5: Make raid5_percpu handling RT aware
pick 41f7be6a0bf6 rt: Introduce cpu_chill()
pick b4dc21395a7d hrtimer: Don't lose state in cpu_chill()
pick fd29abae38fa hrtimer: cpu_chill(): save task state in ->saved_state()
pick a7edd04c85ab block: blk-mq: move blk_queue_usage_counter_release()
into process context
pick 10c92f60395f block: Use cpu_chill() for retry loops
pick 68d5f72f6c39 fs: dcache: Use cpu_chill() in trylock loops
pick 7c5378410371 net: Use cpu_chill() instead of cpu_relax()
pick 96b93ac4f9ec fs/dcache: use swait_queue instead of waitqueue
pick 0d6428e557f2 workqueue: Use normal rcu
pick 46cdd4ce2bb4 workqueue: Use local irq lock instead of irq disable regions
pick e4771b3b1d75 workqueue: Prevent workqueue versus ata-piix livelock
pick 7f4d1437fd83 sched: Distangle worker accounting from rqlock
pick de5794c17deb debugobjects: Make RT aware
pick 5335646d22e8 seqlock: Prevent rt starvation
pick e533ff2a5246 sunrpc: Make svc_xprt_do_enqueue() use get_cpu_light()
pick 5e479879d1ce net: Use skbufhead with raw lock
pick b47b2fbf67cc net: move xmit_recursion to per-task variable on -RT
pick bd774d290977 net: provide a way to delegate processing a softirq to
ksoftirqd
pick 2f116045c3f1 net: dev: always take qdisc's busylock in __dev_xmit_skb()
pick 29dbfaac29c5 net/Qdisc: use a seqlock instead seqcount
pick c7968ed6b615 net: add back the missing serialization in
ip_send_unicast_reply()
pick e5113ce66c06 net: add a lock around icmp_sk()
pick 2432ee4bae6c net: Have __napi_schedule_irqoff() disable interrupts on
RT
pick fc9f4631a290 irqwork: push most work into softirq context
pick 04a1e1f2aa0d printk: Make rt aware
pick db508d28536f kernel/printk: Don't try to print from IRQ/NMI region
pick 502f80cc6396 printk: Drop the logbuf_lock more often
pick 1f904a831f47 ARM: enable irq in translation/section permission fault
handlers
pick d57873234f4e genirq: update irq_set_irqchip_state documentation
pick 1587d9b527d1 KVM: arm/arm64: downgrade preempt_disable()d region
to
migrate_disable()
pick 9ad729bda0ad arm64: fpsimd: use preemp_disable in addition to
local_bh_disable()
pick 9ea835e7e222 kgdb/serial: Short term workaround
pick 0def4cfed4bc sysfs: Add /sys/kernel/realtime entry
pick d6559d05ba28 mm, rt: kmap_atomic scheduling
pick 172af478fc0a x86/highmem: Add a "already used pte" check
pick aedd824e87cb arm/highmem: Flush tlb on unmap
pick 9e106bc3892f arm: Enable highmem for rt
pick 94434f02bd40 scsi/fcoe: Make RT aware.
pick 663928d94580 x86: crypto: Reduce preempt disabled regions
pick 9e1183c96782 crypto: Reduce preempt disabled regions, more algos
pick 6960b353f03e crypto: limit more FPU-enabled sections
pick 685152deb622 crypto: scompress - serialize RT percpu scratch buffer
access
with a local lock
pick 6ac01984f2a0 crypto: cryptd - add a lock instead
preempt_disable/local_bh_disable
pick 83c5815df005 panic: skip get_random_bytes for RT_FULL in init_oops_id
pick 04c6848abe95 x86: stackprotector: Avoid random pool on rt
pick d259cd9b1528 random: Make it work on rt
pick 2330ffd2ea17 cpu/hotplug: Implement CPU pinning
pick f51c291d7a8c sched: Allow pinned user tasks to be awakened to the CPU
they pinned
pick 446d3b598f46 hotplug: duct-tape RT-rwlock usage for non-RT
pick 6fdea4f75772 net: Remove preemption disabling in netif_rx()
pick 33b361abdc67 net: Another local_irq_disable/kmalloc headache
pick 1ed4955c1659 net/core: protect users of napi_alloc_cache against
reentrance
pick 31eac99e4c99 net: netfilter: Serialize xt_write_recseq sections on RT
pick e0e7b52f8feb net: Add a mutex around devnet_rename_seq
pick e21468d9dbb3 lockdep: selftest: Only do hardirq context test for raw
spinlock
pick c98e1e1915e3 lockdep: selftest: fix warnings due to missing PREEMPT_RT
conditionals
pick 1d80dd375f75 sched: Add support for lazy preemption
pick 526627fd4828 ftrace: Fix trace header alignment
pick 150dab4d290c x86: Support for lazy preemption
pick 04dc4533ed20 x86: lazy-preempt: properly check against preempt-mask
pick 4902852b7e48 x86: lazy-preempt: use proper return label on 32bit-x86
OK pick 948b7cfa39b0 arm: Add support for lazy preemption
pick 7628f6397275 powerpc: Add support for lazy preemption
pick 68e2b1f77c5d arch/arm64: Add lazy preempt support
pick 829e7d2af839 connector/cn_proc: Protect send_msg() with a local lock
on
RT
pick bab609040081 drivers/block/zram: Replace bit spinlocks with rtmutex for
-
rt
pick 253dccd9c822 drivers/zram: Don't disable preemption in
zcomp_stream_get/put()
pick 6e581927b8a9 drivers/zram: fix zcomp_stream_get() smp_processor_id()
use in preemptible code
pick a578207ba92a tpm_tis: fix stall after iowrite*()s
pick 5dbe4296d49c watchdog: prevent deferral of watchdogd wakeup on RT
pick 2076de67abf9 drm,radeon,i915: Use preempt_disable/enable_rt() where
recommended
pick 0f3bcd6901e0 drm,i915: Use local_lock/unlock_irq() in
intel_pipe_update_start/end()
pick 2089f853a8c3 drm/i915: disable tracing on -RT
pick c82fe0af5e58 drm/i915: skip DRM_I915_LOW_LEVEL_TRACEPOINTS with
NOTRACE
pick 37925bf71573 cgroups: use simple wait in css_release()
pick c5eda0594d49 cpuset: Convert callback_lock to raw_spinlock_t
pick 756433e002d9 apparmor: use a locallock instead preempt_disable()
pick 73c433d86e25 workqueue: Prevent deadlock/stall on RT
pick 35bc2a5af2fe signals: Allow rt tasks to cache one sigqueue struct
pick 42c2f9cb1122 Add localversion for -RT release
pick 85773be1821e powerpc/pseries/iommu: Use a locallock instead
local_irq_save()
pick 2667064a1f3f powerpc: reshuffle TIF bits
pick 55f7a7895171 tty/sysrq: Convert show_lock to raw_spinlock_t
pick b7cd1dad634c drm/i915: Don't disable interrupts independently of the
lock
pick 066e20ff7b54 sched/completion: Fix a lockup in wait_for_completion()
pick 54498c787596 kthread: add a global worker thread.
pick 80d5e2935a6c genirq: Do not invoke the affinity callback via a workqueue
on RT
pick f9d3f116e098 genirq: Handle missing work_struct in
irq_set_affinity_notifier()
pick e2c1e143e74a arm: imx6: cpuidle: Use raw_spinlock_t
OK 122904930 / 122959477 pick 69aa73357e6a rcu: Don't allow to change
rcu_normal_after_boot on RT
bad? 122951549 bad? 126355890 real failure when entering usersace pick
849ef8789077 pci/switchtec: fix stream_open.cocci warnings
pick ad8a5e8279c4 sched/core: Drop a preempt_disable_rt() statement
bad? 122942465 pick 966f066d96cb timers: Redo the notification of canceling
timers on -RT
pick 0393fd5a4f9a Revert "futex: Ensure lock/unlock symetry versus pi_lock
and
hash bucket lock"
pick 84eb0b64a27a Revert "futex: Fix bug on when a requeued RT task times
out"
pick fcc893280f4e Revert "rtmutex: Handle the various new futex race
conditions"
pick 2eac93cf9d16 Revert "futex: workaround migrate_disable/enable in
different context"
pick 9b8964629f4f futex: Make the futex_hash_bucket lock raw
pick cc1812bf198b futex: Delay deallocation of pi_state
bad? pick f5e115c43100 mm/zswap: Do not disable preemption in
zswap_frontswap_store()
pick e0d0d09a08ad revert-aio
pick a0a40bfb4300 fs/aio: simple simple work
pick 0fae581d8c5e revert-thermal
pick c0d95b4a8a1b thermal: Defer thermal wakups to threads
pick 700fbb4afb6e revert-block
pick 4cda50ff12cf block: blk-mq: move blk_queue_usage_counter_release()
into
process context
pick 9e982f55745b workqueue: rework
pick c0db53dc3bf4 i2c: exynos5: Remove IRQF_ONESHOT
pick 1f160d170203 i2c: hix5hd2: Remove IRQF_ONESHOT
BAD 122882826 eae5a7cab722 sched/deadline: Ensure inactive_timer runs in
hardirq context
pick 6249683b77f6 thermal/x86_pkg_temp: make pkg_temp_lock a raw
spinlock
pick 956a5c214a5b dma-buf: Use seqlock_t instread disabling preemption
pick 94f6fa62de56 KVM: arm/arm64: Let the timer expire in hardirq context on
RT
pick b1a74023533a x86: preempt: Check preemption level before looking at
lazy-preempt
pick 1bdbd966d713 hrtimer: Use READ_ONCE to access timer->base in
hrimer_grab_expiry_lock()
pick b87859791ff6 hrtimer: Don't grab the expiry lock for non-soft hrtimer
pick cc6c170874b9 hrtimer: Prevent using hrtimer_grab_expiry_lock() on
migration_base
pick d5b21b1a259f hrtimer: Add a missing bracket and hide `migration_base'
on
!SMP
pick 6bc5d45d9c6f posix-timers: Unlock expiry lock in the early return
pick 05c2db84cb7a sched: migrate_dis/enable: Use sleeping_lock…() to
annotate sleeping points
pick c282770121a7 sched: __set_cpus_allowed_ptr: Check cpus_mask, not
cpus_ptr
pick e4f2a78d7ddb sched: Remove dead __migrate_disabled() check
pick 1a7d39dc51d2 sched: migrate disable: Protect cpus_ptr with lock
pick dda8037814c5 lib/smp_processor_id: Don't use cpumask_equal()
pick a7307f4e5926 futex: Make the futex_hash_bucket spinlock_t again and
bring back its old state
pick dad5e45d6919 locking/rtmutex: Clean ->pi_blocked_on in the error case
pick de2975927caf lib/ubsan: Don't seralize UBSAN report
pick 48b199bebe5c kmemleak: Change the lock of kmemleak_object to
raw_spinlock_t
pick 7a67c9eb660a sched: migrate_enable: Use select_fallback_rq()
pick 46f7b9689c65 sched: Lazy migrate_disable processing
pick 7bcbdecb866e sched: migrate_enable: Use stop_one_cpu_nowait()
pick 0c78796b3b3c Revert "ARM: Initialize split page table locks for vector
page"
pick 984f60beac6e locking: Make spinlock_t and rwlock_t a RCU section on RT
pick bdaac02765af sched/core: migrate_enable() must access
takedown_cpu_task on !HOTPLUG_CPU
pick 041a0825cc80 lib/smp_processor_id: Adjust check_preemption_disabled()
pick 0aafa6ab4265 sched: migrate_enable: Busy loop until the migration
request
is completed
pick 08447476459e Linux 4.19.106-rt44 REBASE


--
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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Re: realtime on de0-nano bisection

Chris Paterson
 

Hello Pavel,

From: Pavel Machek <pavel@denx.de>
Sent: 19 March 2020 11:05

Hi!

I'm fighting with realtime on de0-nano, and I could use some
help... locating the bad commit. I don't seem to know enough about
test infrastructure to be effective. I pushed a tree I'm interested in
to:

https://gitlab.com/cip-project/cip-kernel/linux-cip/tree/ci/pavel/linux-cip

And I believe regression is somewhere in there. I just don't know
where.
What Kernel config are you using?


List of commits is below. I believe 4.19.106-cip21 is okay while
4.19.106-cip21 is bad, and I have done some tests, but now it looks
Do you mean 4.19.106-rt44 Is bad?

like tests are unreliable (and even my basic assumptions may be worth
re-testing).

Can you help? I'll be away from console for a few hours now.
I'll get bisecting.

Regards, Chris


Thanks and best regards,
                                                              Pavel



b4.19.106-rt-on-top

OK 122874576 0bf4ec5b1b8419e1c67a72182ee8d9b8d4a9337b 4.19.106-cip21
pick f1b053325784 ARM: at91: add TCB registers definitions
pick 48341c7208c6 clocksource/drivers: Add a new driver for the Atmel ARM TC
blocks
pick 8ea74284f0da clocksource/drivers: timer-atmel-tcb: add clockevent device
on separate channel
pick 5429f0da23be clocksource/drivers: atmel-pit: make option silent
pick 6477898a723c ARM: at91: Implement clocksource selection
pick 52cdb2289480 ARM: configs: at91: use new TCB timer driver
pick 805b059109fa ARM: configs: at91: unselect PIT
pick d400fa638fcc irqchip/gic-v3-its: Move pending table allocation to init time
pick 9310dd1ca83f kthread: convert worker lock to raw spinlock
pick 11024c8759f2 crypto: caam/qi - simplify CGR allocation, freeing
pick e08c2614be3c sched/fair: Robustify CFS-bandwidth timer locking
pick 1b7c0e7aeb78 arm: Convert arm boot_lock to raw
pick da304dd749c0 x86/ioapic: Don't let setaffinity unmask threaded EOI
interrupt too early
pick efec2cbaa31b cgroup: use irqsave in cgroup_rstat_flush_locked()
pick 360801bc5876 fscache: initialize cookie hash table raw spinlocks
pick 9368b25dc6fa Drivers: hv: vmbus: include header for get_irq_regs()
pick 547927a23a72 percpu: include irqflags.h for raw_local_irq_save()
pick 2248f827f7d8 efi: Allow efi=runtime
pick a540fae71a61 x86/efi: drop task_lock() from efi_switch_mm()
pick 090e0c2d3c51 arm64: KVM: compute_layout before altenates are applied
pick a9e8d619b732 of: allocate / free phandle cache outside of the devtree_lock
pick 8bd06913a981 mm/kasan: make quarantine_lock a raw_spinlock_t
pick 47251e12064c EXP rcu: Revert expedited GP parallelization cleverness
pick 1848cf1f8210 kmemleak: Turn kmemleak_lock to raw spinlock on RT
pick 8571ad3b1f02 NFSv4: replace seqcount_t with a seqlock_t
pick a16f287d8bbb kernel: sched: Provide a pointer to the valid CPU mask
pick a10c47495dbd kernel/sched/core: add migrate_disable()
pick 73201d580f10 sched/migrate_disable: Add export_symbol_gpl for
__migrate_disabled
pick 6357e0136e18 arm: at91: do not disable/enable clocks in a row
pick d2df59c13604 clocksource: TCLIB: Allow higher clock rates for clock events
pick 407b62737bc0 timekeeping: Split jiffies seqlock
pick 45e6903195c3 signal: Revert ptrace preempt magic
pick f64b620f24da net: sched: Use msleep() instead of yield()
pick 54eb2ef14895 dm rq: remove BUG_ON(!irqs_disabled) check
pick 2afd479fba8e usb: do no disable interrupts in giveback
pick ab55ba1c34b2 rt: Provide PREEMPT_RT_BASE config switch
pick c0619fc60437 cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT
pick f8682758dc6d jump-label: disable if stop_machine() is used
pick b56cc7361cd8 kconfig: Disable config options which are not RT compatible
pick 1fda74e8a3e1 lockdep: disable self-test
pick f14436ae5581 mm: Allow only slub on RT
pick e4fb4a8d3396 locking: Disable spin on owner for RT
pick 47ad6acb6f1c rcu: Disable RCU_FAST_NO_HZ on RT
pick c825f6367871 rcu: make RCU_BOOST default on RT
pick 85f3409e8999 sched: Disable CONFIG_RT_GROUP_SCHED on RT
pick 804494b45253 net/core: disable NET_RX_BUSY_POLL
pick a53930db0419 arm*: disable NEON in kernel mode
pick b487b0f3edd3 powerpc: Use generic rwsem on RT
pick deac43aa4a58 powerpc/kvm: Disable in-kernel MPIC emulation for
PREEMPT_RT_FULL
pick 9faa800cc8b8 powerpc: Disable highmem on RT
pick b51fe0939f41 mips: Disable highmem on RT
pick 30352c4f0ae4 x86: Use generic rwsem_spinlocks on -rt
pick a794e1ee2f1b leds: trigger: disable CPU trigger on -RT
pick f06b569ea39e cpufreq: drop K8's driver from beeing selected
pick 5fc3818dffbb md: disable bcache
pick a5f2f8f428a9 efi: Disable runtime services on RT
pick 446b178b5c4b printk: Add a printk kill switch
pick 290020fb828c printk: Add "force_early_printk" boot param to help with
debugging
pick 41538af60819 preempt: Provide preempt_*_(no)rt variants
pick 3ae2dfc3a6e2 futex: workaround migrate_disable/enable in different
context
pick 8d271d63aa99 rt: Add local irq locks
pick 8f3ec1753f29 locallock: provide {get,put}_locked_ptr() variants
pick 83a11c32c1cf mm/scatterlist: Do not disable irqs on RT
pick 212b91e0dcb7 signal/x86: Delay calling signals in atomic
pick 91f375350d13 x86/signal: delay calling signals on 32bit
pick ef59f07235f3 buffer_head: Replace bh_uptodate_lock for -rt
pick 157d3af892d4 fs: jbd/jbd2: Make state lock and journal head lock rt safe
pick f83b8474e67e list_bl: Make list head locking RT safe
pick 0d7769b9e6d7 list_bl: fixup bogus lockdep warning
pick 23d976598fca genirq: Disable irqpoll on -rt
pick f482480c8949 genirq: Force interrupt thread on RT
pick cdd0a6dd6cf5 Split IRQ-off and zone->lock while freeing pages from PCP list
#1
pick 238c26eca475 Split IRQ-off and zone->lock while freeing pages from PCP
list #2
pick 9a2a5e8e197a mm/SLxB: change list_lock to raw_spinlock_t
pick cb8ddb1408a1 mm/SLUB: delay giving back empty slubs to IRQ enabled
regions
pick 20228b9ad4cc mm: page_alloc: rt-friendly per-cpu pages
pick fe4307778243 mm/swap: Convert to percpu locked
pick 6f7bced91911 mm: perform lru_add_drain_all() remotely
pick 8cbb64035ad9 mm/vmstat: Protect per cpu variables with preempt disable
on RT
pick 639a673966b9 ARM: Initialize split page table locks for vector page
pick 0acf1cae0903 mm: Enable SLUB for RT
pick b50af682f2b7 slub: Enable irqs for __GFP_WAIT
pick 119281aade10 slub: Disable SLUB_CPU_PARTIAL
pick 8d00c57c199b mm/memcontrol: Don't call schedule_work_on in
preemption disabled context
pick 1c3d8875431d mm/memcontrol: Replace local_irq_disable with local locks
pick 19d8df024e2f mm/zsmalloc: copy with get_cpu_var() and locking
pick 58ab0072e464 x86/mm/pat: disable preemption __split_large_page() after
spin_lock()
pick 68e40ee25e47 radix-tree: use local locks
pick 1a895e4d2468 timers: Prepare for full preemption
pick c03f3c65c426 x86: kvm Require const tsc for RT
pick 8c6fe368e93c pci/switchtec: Don't use completion's wait queue
pick 6ca0461b044c wait.h: include atomic.h
pick 7bf61e8d3fef work-simple: Simple work queue implemenation
pick 2799256f569f work-simple: drop a shit statement in
SWORK_EVENT_PENDING
pick 102f6d1ac234 completion: Use simple wait queues
pick 47b3101f3d3c fs/aio: simple simple work
pick 7d2ab042333b genirq: Do not invoke the affinity callback via a workqueue
on RT
pick 25088eb2a4eb time/hrtimer: avoid schedule_work() with interrupts disabled
pick 5b9f64173e94 hrtimer: consolidate hrtimer_init() + hrtimer_init_sleeper()
calls
pick 32ea9ed16efe hrtimers: Prepare full preemption
pick 9a1897cecdf6 hrtimer: by timers by default into the softirq context
pick b77213918ed5 sched/fair: Make the hrtimers non-hard again
pick e4d973f6534a hrtimer: Move schedule_work call to helper thread
pick 1f9f089947fc hrtimer: move state change before hrtimer_cancel in
do_nanosleep()
pick f7e40a8d672b posix-timers: Thread posix-cpu-timers on -rt
pick 57c7cc8173dc sched: Move task_struct cleanup to RCU
pick e754db200003 sched: Limit the number of task migrations per batch
pick 1f870d384a18 sched: Move mmdrop to RCU on RT
pick daf050c81744 kernel/sched: move stack + kprobe clean up to
__put_task_struct()
pick fa37473e6dba sched: Add saved_state for tasks blocked on sleeping locks
pick 2f85b7585307 sched: Do not account rcu_preempt_depth on RT in
might_sleep()
pick e3858ec6e217 sched: Use the proper LOCK_OFFSET for cond_resched()
pick ca1333aa370e sched: Disable TTWU_QUEUE on RT
pick 16f42ccd7684 sched/workqueue: Only wake up idle workers if not blocked
on sleeping spin lock
pick bf8f0c64f67d rt: Increase/decrease the nr of migratory tasks when
enabling/disabling migration
pick e06c269c2652 hotplug: Lightweight get online cpus
pick f2e100b9f722 trace: Add migrate-disabled counter to tracing output
pick c4429f1e6c31 lockdep: Make it RT aware
pick 4c99a296d07e tasklet: Prevent tasklets from going into infinite spin in RT
pick 534dacca039e softirq: Check preemption after reenabling interrupts
pick 3a729860bc98 softirq: Disable softirq stacks for RT
pick 96a086038771 softirq: Split softirq locks
pick 618155302c43 net/core: use local_bh_disable() in netif_rx_ni()
pick 83a8d2a52ca3 genirq: Allow disabling of softirq processing in irq thread
context
pick 3487fb436997 softirq: split timer softirqs out of ksoftirqd
pick f774fa3fcce1 softirq: Avoid "local_softirq_pending" messages if ksoftirqd is
blocked
pick df000153612e softirq: Avoid "local_softirq_pending" messages if task is in
cpu_chill()
pick f6c58cb3103a rtmutex: trylock is okay on -RT
pick 9548e282eb13 fs/nfs: turn rmdir_sem into a semaphore
pick a8fd0847fc2f rtmutex: Handle the various new futex race conditions
pick 35bce82bb299 futex: Fix bug on when a requeued RT task times out
pick a955c20a684c futex: Ensure lock/unlock symetry versus pi_lock and hash
bucket lock
pick 26a04c6463c1 pid.h: include atomic.h
pick cdcef3c3c000 arm: include definition for cpumask_t
pick 3bca4d9be9ac locking: locktorture: Do NOT include rwlock.h directly
pick 42782ac504d4 rtmutex: Add rtmutex_lock_killable()
pick 2c8595a53cd4 rtmutex: Make lock_killable work
pick 23b3ca2280af spinlock: Split the lock types header
pick 5f60c6ae6dde rtmutex: Avoid include hell
pick 995ecbc4c0d3 rbtree: don't include the rcu header
pick 27e9eb247033 rtmutex: Provide rt_mutex_slowlock_locked()
pick a468d3437296 rtmutex: export lockdep-less version of rt_mutex's lock,
trylock and unlock
pick 58790944fce8 rtmutex: add sleeping lock implementation
pick 052a52983b60 rtmutex: add mutex implementation based on rtmutex
pick b4235746586d rtmutex: add rwsem implementation based on rtmutex
pick 24d8016ec9e5 rtmutex: add rwlock implementation based on rtmutex
OK 122889823 pick e5c0eab8e437 rtmutex/rwlock: preserve state like a sleeping
lock
pick 3bc0aceff337 rtmutex: wire up RT's locking
pick a7d5da8792ca rtmutex: add ww_mutex addon for mutex-rt
pick f9bde2392945 kconfig: Add PREEMPT_RT_FULL
pick 574150d18d52 locking/rt-mutex: fix deadlock in device mapper / block-IO
pick fabe7e1f9cc8 locking/rt-mutex: Flush block plug on __down_read()
pick 461cea5862c2 locking/rtmutex: re-init the wait_lock in
rt_mutex_init_proxy_locked()
pick 17dc818f1b09 ptrace: fix ptrace vs tasklist_lock race
pick e4eb4b5f10c3 rtmutex: annotate sleeping lock context
pick 833397adc966 sched/migrate_disable: fallback to preempt_disable()
instead barrier()
pick a08b762ef304 locking: don't check for __LINUX_SPINLOCK_TYPES_H on -RT
archs
pick 6cb3f91b9265 rcu: Frob softirq test
pick 050e3ab7293e rcu: Merge RCU-bh into RCU-preempt
pick d1f13f5715ff rcu: Make ksoftirqd do RCU quiescent states
pick 68e8f96963a0 rcu: Eliminate softirq processing from rcutree
pick c107e3408262 srcu: use cpu_online() instead custom check
pick 80dd78936722 srcu: replace local_irqsave() with a locallock
pick a1ea3f3b5d80 rcu: enable rcu_normal_after_boot by default for RT
pick 6e1f123fe270 tty/serial/omap: Make the locking RT aware
pick 53a1138616f2 tty/serial/pl011: Make the locking work on RT
pick f9f8eec35d32 tty: serial: pl011: explicitly initialize the flags variable
pick 846b95cf90a9 rt: Improve the serial console PASS_LIMIT
pick cd9897a02ce8 tty: serial: 8250: don't take the trylock during oops
pick 4d83234e6b83 locking/percpu-rwsem: Remove preempt_disable variants
pick 6c8fe3277d4b mm: Protect activate_mm() by
preempt_[disable&enable]_rt()
pick 224aa887839e fs/dcache: bring back explicit INIT_HLIST_BL_HEAD init
pick a19ccfffd6fe fs/dcache: disable preemption on i_dir_seq's write side
pick 242dc74c7ba0 squashfs: make use of local lock in multi_cpu decompressor
pick efae64412664 thermal: Defer thermal wakups to threads
pick bd6193758b42 x86/fpu: Disable preemption around local_bh_disable()
pick 57754daf7ab5 fs/epoll: Do not disable preemption on RT
pick 5ba09ebcdb9d mm/vmalloc: Another preempt disable region which sucks
pick 2a14fc037798 block: mq: use cpu_light()
pick 44cb8f829fe8 block/mq: do not invoke preempt_disable()
pick 1a0cbc8049b7 block/mq: don't complete requests via IPI
pick 7e2a9e291159 md: raid5: Make raid5_percpu handling RT aware
pick 41f7be6a0bf6 rt: Introduce cpu_chill()
pick b4dc21395a7d hrtimer: Don't lose state in cpu_chill()
pick fd29abae38fa hrtimer: cpu_chill(): save task state in ->saved_state()
pick a7edd04c85ab block: blk-mq: move blk_queue_usage_counter_release()
into process context
pick 10c92f60395f block: Use cpu_chill() for retry loops
pick 68d5f72f6c39 fs: dcache: Use cpu_chill() in trylock loops
pick 7c5378410371 net: Use cpu_chill() instead of cpu_relax()
pick 96b93ac4f9ec fs/dcache: use swait_queue instead of waitqueue
pick 0d6428e557f2 workqueue: Use normal rcu
pick 46cdd4ce2bb4 workqueue: Use local irq lock instead of irq disable regions
pick e4771b3b1d75 workqueue: Prevent workqueue versus ata-piix livelock
pick 7f4d1437fd83 sched: Distangle worker accounting from rqlock
pick de5794c17deb debugobjects: Make RT aware
pick 5335646d22e8 seqlock: Prevent rt starvation
pick e533ff2a5246 sunrpc: Make svc_xprt_do_enqueue() use get_cpu_light()
pick 5e479879d1ce net: Use skbufhead with raw lock
pick b47b2fbf67cc net: move xmit_recursion to per-task variable on -RT
pick bd774d290977 net: provide a way to delegate processing a softirq to
ksoftirqd
pick 2f116045c3f1 net: dev: always take qdisc's busylock in __dev_xmit_skb()
pick 29dbfaac29c5 net/Qdisc: use a seqlock instead seqcount
pick c7968ed6b615 net: add back the missing serialization in
ip_send_unicast_reply()
pick e5113ce66c06 net: add a lock around icmp_sk()
pick 2432ee4bae6c net: Have __napi_schedule_irqoff() disable interrupts on RT
pick fc9f4631a290 irqwork: push most work into softirq context
pick 04a1e1f2aa0d printk: Make rt aware
pick db508d28536f kernel/printk: Don't try to print from IRQ/NMI region
pick 502f80cc6396 printk: Drop the logbuf_lock more often
pick 1f904a831f47 ARM: enable irq in translation/section permission fault
handlers
pick d57873234f4e genirq: update irq_set_irqchip_state documentation
pick 1587d9b527d1 KVM: arm/arm64: downgrade preempt_disable()d region to
migrate_disable()
pick 9ad729bda0ad arm64: fpsimd: use preemp_disable in addition to
local_bh_disable()
pick 9ea835e7e222 kgdb/serial: Short term workaround
pick 0def4cfed4bc sysfs: Add /sys/kernel/realtime entry
pick d6559d05ba28 mm, rt: kmap_atomic scheduling
pick 172af478fc0a x86/highmem: Add a "already used pte" check
pick aedd824e87cb arm/highmem: Flush tlb on unmap
pick 9e106bc3892f arm: Enable highmem for rt
pick 94434f02bd40 scsi/fcoe: Make RT aware.
pick 663928d94580 x86: crypto: Reduce preempt disabled regions
pick 9e1183c96782 crypto: Reduce preempt disabled regions, more algos
pick 6960b353f03e crypto: limit more FPU-enabled sections
pick 685152deb622 crypto: scompress - serialize RT percpu scratch buffer access
with a local lock
pick 6ac01984f2a0 crypto: cryptd - add a lock instead
preempt_disable/local_bh_disable
pick 83c5815df005 panic: skip get_random_bytes for RT_FULL in init_oops_id
pick 04c6848abe95 x86: stackprotector: Avoid random pool on rt
pick d259cd9b1528 random: Make it work on rt
pick 2330ffd2ea17 cpu/hotplug: Implement CPU pinning
pick f51c291d7a8c sched: Allow pinned user tasks to be awakened to the CPU
they pinned
pick 446d3b598f46 hotplug: duct-tape RT-rwlock usage for non-RT
pick 6fdea4f75772 net: Remove preemption disabling in netif_rx()
pick 33b361abdc67 net: Another local_irq_disable/kmalloc headache
pick 1ed4955c1659 net/core: protect users of napi_alloc_cache against
reentrance
pick 31eac99e4c99 net: netfilter: Serialize xt_write_recseq sections on RT
pick e0e7b52f8feb net: Add a mutex around devnet_rename_seq
pick e21468d9dbb3 lockdep: selftest: Only do hardirq context test for raw
spinlock
pick c98e1e1915e3 lockdep: selftest: fix warnings due to missing PREEMPT_RT
conditionals
pick 1d80dd375f75 sched: Add support for lazy preemption
pick 526627fd4828 ftrace: Fix trace header alignment
pick 150dab4d290c x86: Support for lazy preemption
pick 04dc4533ed20 x86: lazy-preempt: properly check against preempt-mask
pick 4902852b7e48 x86: lazy-preempt: use proper return label on 32bit-x86
OK pick 948b7cfa39b0 arm: Add support for lazy preemption
pick 7628f6397275 powerpc: Add support for lazy preemption
pick 68e2b1f77c5d arch/arm64: Add lazy preempt support
pick 829e7d2af839 connector/cn_proc: Protect send_msg() with a local lock on
RT
pick bab609040081 drivers/block/zram: Replace bit spinlocks with rtmutex for -
rt
pick 253dccd9c822 drivers/zram: Don't disable preemption in
zcomp_stream_get/put()
pick 6e581927b8a9 drivers/zram: fix zcomp_stream_get() smp_processor_id()
use in preemptible code
pick a578207ba92a tpm_tis: fix stall after iowrite*()s
pick 5dbe4296d49c watchdog: prevent deferral of watchdogd wakeup on RT
pick 2076de67abf9 drm,radeon,i915: Use preempt_disable/enable_rt() where
recommended
pick 0f3bcd6901e0 drm,i915: Use local_lock/unlock_irq() in
intel_pipe_update_start/end()
pick 2089f853a8c3 drm/i915: disable tracing on -RT
pick c82fe0af5e58 drm/i915: skip DRM_I915_LOW_LEVEL_TRACEPOINTS with
NOTRACE
pick 37925bf71573 cgroups: use simple wait in css_release()
pick c5eda0594d49 cpuset: Convert callback_lock to raw_spinlock_t
pick 756433e002d9 apparmor: use a locallock instead preempt_disable()
pick 73c433d86e25 workqueue: Prevent deadlock/stall on RT
pick 35bc2a5af2fe signals: Allow rt tasks to cache one sigqueue struct
pick 42c2f9cb1122 Add localversion for -RT release
pick 85773be1821e powerpc/pseries/iommu: Use a locallock instead
local_irq_save()
pick 2667064a1f3f powerpc: reshuffle TIF bits
pick 55f7a7895171 tty/sysrq: Convert show_lock to raw_spinlock_t
pick b7cd1dad634c drm/i915: Don't disable interrupts independently of the lock
pick 066e20ff7b54 sched/completion: Fix a lockup in wait_for_completion()
pick 54498c787596 kthread: add a global worker thread.
pick 80d5e2935a6c genirq: Do not invoke the affinity callback via a workqueue
on RT
pick f9d3f116e098 genirq: Handle missing work_struct in
irq_set_affinity_notifier()
pick e2c1e143e74a arm: imx6: cpuidle: Use raw_spinlock_t
OK 122904930 / 122959477 pick 69aa73357e6a rcu: Don't allow to change
rcu_normal_after_boot on RT
bad? 122951549 bad? 126355890 real failure when entering usersace pick
849ef8789077 pci/switchtec: fix stream_open.cocci warnings
pick ad8a5e8279c4 sched/core: Drop a preempt_disable_rt() statement
bad? 122942465 pick 966f066d96cb timers: Redo the notification of canceling
timers on -RT
pick 0393fd5a4f9a Revert "futex: Ensure lock/unlock symetry versus pi_lock and
hash bucket lock"
pick 84eb0b64a27a Revert "futex: Fix bug on when a requeued RT task times
out"
pick fcc893280f4e Revert "rtmutex: Handle the various new futex race
conditions"
pick 2eac93cf9d16 Revert "futex: workaround migrate_disable/enable in
different context"
pick 9b8964629f4f futex: Make the futex_hash_bucket lock raw
pick cc1812bf198b futex: Delay deallocation of pi_state
bad? pick f5e115c43100 mm/zswap: Do not disable preemption in
zswap_frontswap_store()
pick e0d0d09a08ad revert-aio
pick a0a40bfb4300 fs/aio: simple simple work
pick 0fae581d8c5e revert-thermal
pick c0d95b4a8a1b thermal: Defer thermal wakups to threads
pick 700fbb4afb6e revert-block
pick 4cda50ff12cf block: blk-mq: move blk_queue_usage_counter_release() into
process context
pick 9e982f55745b workqueue: rework
pick c0db53dc3bf4 i2c: exynos5: Remove IRQF_ONESHOT
pick 1f160d170203 i2c: hix5hd2: Remove IRQF_ONESHOT
BAD 122882826 eae5a7cab722 sched/deadline: Ensure inactive_timer runs in
hardirq context
pick 6249683b77f6 thermal/x86_pkg_temp: make pkg_temp_lock a raw spinlock
pick 956a5c214a5b dma-buf: Use seqlock_t instread disabling preemption
pick 94f6fa62de56 KVM: arm/arm64: Let the timer expire in hardirq context on
RT
pick b1a74023533a x86: preempt: Check preemption level before looking at
lazy-preempt
pick 1bdbd966d713 hrtimer: Use READ_ONCE to access timer->base in
hrimer_grab_expiry_lock()
pick b87859791ff6 hrtimer: Don't grab the expiry lock for non-soft hrtimer
pick cc6c170874b9 hrtimer: Prevent using hrtimer_grab_expiry_lock() on
migration_base
pick d5b21b1a259f hrtimer: Add a missing bracket and hide `migration_base' on
!SMP
pick 6bc5d45d9c6f posix-timers: Unlock expiry lock in the early return
pick 05c2db84cb7a sched: migrate_dis/enable: Use sleeping_lock…() to
annotate sleeping points
pick c282770121a7 sched: __set_cpus_allowed_ptr: Check cpus_mask, not
cpus_ptr
pick e4f2a78d7ddb sched: Remove dead __migrate_disabled() check
pick 1a7d39dc51d2 sched: migrate disable: Protect cpus_ptr with lock
pick dda8037814c5 lib/smp_processor_id: Don't use cpumask_equal()
pick a7307f4e5926 futex: Make the futex_hash_bucket spinlock_t again and
bring back its old state
pick dad5e45d6919 locking/rtmutex: Clean ->pi_blocked_on in the error case
pick de2975927caf lib/ubsan: Don't seralize UBSAN report
pick 48b199bebe5c kmemleak: Change the lock of kmemleak_object to
raw_spinlock_t
pick 7a67c9eb660a sched: migrate_enable: Use select_fallback_rq()
pick 46f7b9689c65 sched: Lazy migrate_disable processing
pick 7bcbdecb866e sched: migrate_enable: Use stop_one_cpu_nowait()
pick 0c78796b3b3c Revert "ARM: Initialize split page table locks for vector page"
pick 984f60beac6e locking: Make spinlock_t and rwlock_t a RCU section on RT
pick bdaac02765af sched/core: migrate_enable() must access
takedown_cpu_task on !HOTPLUG_CPU
pick 041a0825cc80 lib/smp_processor_id: Adjust check_preemption_disabled()
pick 0aafa6ab4265 sched: migrate_enable: Busy loop until the migration request
is completed
pick 08447476459e Linux 4.19.106-rt44 REBASE


--
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany


realtime on de0-nano bisection

Pavel Machek
 

Hi!

I'm fighting with realtime on de0-nano, and I could use some
help... locating the bad commit. I don't seem to know enough about
test infrastructure to be effective. I pushed a tree I'm interested in
to:

https://gitlab.com/cip-project/cip-kernel/linux-cip/tree/ci/pavel/linux-cip

And I believe regression is somewhere in there. I just don't know
where.

List of commits is below. I believe 4.19.106-cip21 is okay while
4.19.106-cip21 is bad, and I have done some tests, but now it looks
like tests are unreliable (and even my basic assumptions may be worth
re-testing).

Can you help? I'll be away from console for a few hours now.

Thanks and best regards,
Pavel



b4.19.106-rt-on-top

OK 122874576 0bf4ec5b1b8419e1c67a72182ee8d9b8d4a9337b 4.19.106-cip21
pick f1b053325784 ARM: at91: add TCB registers definitions
pick 48341c7208c6 clocksource/drivers: Add a new driver for the Atmel ARM TC blocks
pick 8ea74284f0da clocksource/drivers: timer-atmel-tcb: add clockevent device on separate channel
pick 5429f0da23be clocksource/drivers: atmel-pit: make option silent
pick 6477898a723c ARM: at91: Implement clocksource selection
pick 52cdb2289480 ARM: configs: at91: use new TCB timer driver
pick 805b059109fa ARM: configs: at91: unselect PIT
pick d400fa638fcc irqchip/gic-v3-its: Move pending table allocation to init time
pick 9310dd1ca83f kthread: convert worker lock to raw spinlock
pick 11024c8759f2 crypto: caam/qi - simplify CGR allocation, freeing
pick e08c2614be3c sched/fair: Robustify CFS-bandwidth timer locking
pick 1b7c0e7aeb78 arm: Convert arm boot_lock to raw
pick da304dd749c0 x86/ioapic: Don't let setaffinity unmask threaded EOI interrupt too early
pick efec2cbaa31b cgroup: use irqsave in cgroup_rstat_flush_locked()
pick 360801bc5876 fscache: initialize cookie hash table raw spinlocks
pick 9368b25dc6fa Drivers: hv: vmbus: include header for get_irq_regs()
pick 547927a23a72 percpu: include irqflags.h for raw_local_irq_save()
pick 2248f827f7d8 efi: Allow efi=runtime
pick a540fae71a61 x86/efi: drop task_lock() from efi_switch_mm()
pick 090e0c2d3c51 arm64: KVM: compute_layout before altenates are applied
pick a9e8d619b732 of: allocate / free phandle cache outside of the devtree_lock
pick 8bd06913a981 mm/kasan: make quarantine_lock a raw_spinlock_t
pick 47251e12064c EXP rcu: Revert expedited GP parallelization cleverness
pick 1848cf1f8210 kmemleak: Turn kmemleak_lock to raw spinlock on RT
pick 8571ad3b1f02 NFSv4: replace seqcount_t with a seqlock_t
pick a16f287d8bbb kernel: sched: Provide a pointer to the valid CPU mask
pick a10c47495dbd kernel/sched/core: add migrate_disable()
pick 73201d580f10 sched/migrate_disable: Add export_symbol_gpl for __migrate_disabled
pick 6357e0136e18 arm: at91: do not disable/enable clocks in a row
pick d2df59c13604 clocksource: TCLIB: Allow higher clock rates for clock events
pick 407b62737bc0 timekeeping: Split jiffies seqlock
pick 45e6903195c3 signal: Revert ptrace preempt magic
pick f64b620f24da net: sched: Use msleep() instead of yield()
pick 54eb2ef14895 dm rq: remove BUG_ON(!irqs_disabled) check
pick 2afd479fba8e usb: do no disable interrupts in giveback
pick ab55ba1c34b2 rt: Provide PREEMPT_RT_BASE config switch
pick c0619fc60437 cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT
pick f8682758dc6d jump-label: disable if stop_machine() is used
pick b56cc7361cd8 kconfig: Disable config options which are not RT compatible
pick 1fda74e8a3e1 lockdep: disable self-test
pick f14436ae5581 mm: Allow only slub on RT
pick e4fb4a8d3396 locking: Disable spin on owner for RT
pick 47ad6acb6f1c rcu: Disable RCU_FAST_NO_HZ on RT
pick c825f6367871 rcu: make RCU_BOOST default on RT
pick 85f3409e8999 sched: Disable CONFIG_RT_GROUP_SCHED on RT
pick 804494b45253 net/core: disable NET_RX_BUSY_POLL
pick a53930db0419 arm*: disable NEON in kernel mode
pick b487b0f3edd3 powerpc: Use generic rwsem on RT
pick deac43aa4a58 powerpc/kvm: Disable in-kernel MPIC emulation for PREEMPT_RT_FULL
pick 9faa800cc8b8 powerpc: Disable highmem on RT
pick b51fe0939f41 mips: Disable highmem on RT
pick 30352c4f0ae4 x86: Use generic rwsem_spinlocks on -rt
pick a794e1ee2f1b leds: trigger: disable CPU trigger on -RT
pick f06b569ea39e cpufreq: drop K8's driver from beeing selected
pick 5fc3818dffbb md: disable bcache
pick a5f2f8f428a9 efi: Disable runtime services on RT
pick 446b178b5c4b printk: Add a printk kill switch
pick 290020fb828c printk: Add "force_early_printk" boot param to help with debugging
pick 41538af60819 preempt: Provide preempt_*_(no)rt variants
pick 3ae2dfc3a6e2 futex: workaround migrate_disable/enable in different context
pick 8d271d63aa99 rt: Add local irq locks
pick 8f3ec1753f29 locallock: provide {get,put}_locked_ptr() variants
pick 83a11c32c1cf mm/scatterlist: Do not disable irqs on RT
pick 212b91e0dcb7 signal/x86: Delay calling signals in atomic
pick 91f375350d13 x86/signal: delay calling signals on 32bit
pick ef59f07235f3 buffer_head: Replace bh_uptodate_lock for -rt
pick 157d3af892d4 fs: jbd/jbd2: Make state lock and journal head lock rt safe
pick f83b8474e67e list_bl: Make list head locking RT safe
pick 0d7769b9e6d7 list_bl: fixup bogus lockdep warning
pick 23d976598fca genirq: Disable irqpoll on -rt
pick f482480c8949 genirq: Force interrupt thread on RT
pick cdd0a6dd6cf5 Split IRQ-off and zone->lock while freeing pages from PCP list #1
pick 238c26eca475 Split IRQ-off and zone->lock while freeing pages from PCP list #2
pick 9a2a5e8e197a mm/SLxB: change list_lock to raw_spinlock_t
pick cb8ddb1408a1 mm/SLUB: delay giving back empty slubs to IRQ enabled regions
pick 20228b9ad4cc mm: page_alloc: rt-friendly per-cpu pages
pick fe4307778243 mm/swap: Convert to percpu locked
pick 6f7bced91911 mm: perform lru_add_drain_all() remotely
pick 8cbb64035ad9 mm/vmstat: Protect per cpu variables with preempt disable on RT
pick 639a673966b9 ARM: Initialize split page table locks for vector page
pick 0acf1cae0903 mm: Enable SLUB for RT
pick b50af682f2b7 slub: Enable irqs for __GFP_WAIT
pick 119281aade10 slub: Disable SLUB_CPU_PARTIAL
pick 8d00c57c199b mm/memcontrol: Don't call schedule_work_on in preemption disabled context
pick 1c3d8875431d mm/memcontrol: Replace local_irq_disable with local locks
pick 19d8df024e2f mm/zsmalloc: copy with get_cpu_var() and locking
pick 58ab0072e464 x86/mm/pat: disable preemption __split_large_page() after spin_lock()
pick 68e40ee25e47 radix-tree: use local locks
pick 1a895e4d2468 timers: Prepare for full preemption
pick c03f3c65c426 x86: kvm Require const tsc for RT
pick 8c6fe368e93c pci/switchtec: Don't use completion's wait queue
pick 6ca0461b044c wait.h: include atomic.h
pick 7bf61e8d3fef work-simple: Simple work queue implemenation
pick 2799256f569f work-simple: drop a shit statement in SWORK_EVENT_PENDING
pick 102f6d1ac234 completion: Use simple wait queues
pick 47b3101f3d3c fs/aio: simple simple work
pick 7d2ab042333b genirq: Do not invoke the affinity callback via a workqueue on RT
pick 25088eb2a4eb time/hrtimer: avoid schedule_work() with interrupts disabled
pick 5b9f64173e94 hrtimer: consolidate hrtimer_init() + hrtimer_init_sleeper() calls
pick 32ea9ed16efe hrtimers: Prepare full preemption
pick 9a1897cecdf6 hrtimer: by timers by default into the softirq context
pick b77213918ed5 sched/fair: Make the hrtimers non-hard again
pick e4d973f6534a hrtimer: Move schedule_work call to helper thread
pick 1f9f089947fc hrtimer: move state change before hrtimer_cancel in do_nanosleep()
pick f7e40a8d672b posix-timers: Thread posix-cpu-timers on -rt
pick 57c7cc8173dc sched: Move task_struct cleanup to RCU
pick e754db200003 sched: Limit the number of task migrations per batch
pick 1f870d384a18 sched: Move mmdrop to RCU on RT
pick daf050c81744 kernel/sched: move stack + kprobe clean up to __put_task_struct()
pick fa37473e6dba sched: Add saved_state for tasks blocked on sleeping locks
pick 2f85b7585307 sched: Do not account rcu_preempt_depth on RT in might_sleep()
pick e3858ec6e217 sched: Use the proper LOCK_OFFSET for cond_resched()
pick ca1333aa370e sched: Disable TTWU_QUEUE on RT
pick 16f42ccd7684 sched/workqueue: Only wake up idle workers if not blocked on sleeping spin lock
pick bf8f0c64f67d rt: Increase/decrease the nr of migratory tasks when enabling/disabling migration
pick e06c269c2652 hotplug: Lightweight get online cpus
pick f2e100b9f722 trace: Add migrate-disabled counter to tracing output
pick c4429f1e6c31 lockdep: Make it RT aware
pick 4c99a296d07e tasklet: Prevent tasklets from going into infinite spin in RT
pick 534dacca039e softirq: Check preemption after reenabling interrupts
pick 3a729860bc98 softirq: Disable softirq stacks for RT
pick 96a086038771 softirq: Split softirq locks
pick 618155302c43 net/core: use local_bh_disable() in netif_rx_ni()
pick 83a8d2a52ca3 genirq: Allow disabling of softirq processing in irq thread context
pick 3487fb436997 softirq: split timer softirqs out of ksoftirqd
pick f774fa3fcce1 softirq: Avoid "local_softirq_pending" messages if ksoftirqd is blocked
pick df000153612e softirq: Avoid "local_softirq_pending" messages if task is in cpu_chill()
pick f6c58cb3103a rtmutex: trylock is okay on -RT
pick 9548e282eb13 fs/nfs: turn rmdir_sem into a semaphore
pick a8fd0847fc2f rtmutex: Handle the various new futex race conditions
pick 35bce82bb299 futex: Fix bug on when a requeued RT task times out
pick a955c20a684c futex: Ensure lock/unlock symetry versus pi_lock and hash bucket lock
pick 26a04c6463c1 pid.h: include atomic.h
pick cdcef3c3c000 arm: include definition for cpumask_t
pick 3bca4d9be9ac locking: locktorture: Do NOT include rwlock.h directly
pick 42782ac504d4 rtmutex: Add rtmutex_lock_killable()
pick 2c8595a53cd4 rtmutex: Make lock_killable work
pick 23b3ca2280af spinlock: Split the lock types header
pick 5f60c6ae6dde rtmutex: Avoid include hell
pick 995ecbc4c0d3 rbtree: don't include the rcu header
pick 27e9eb247033 rtmutex: Provide rt_mutex_slowlock_locked()
pick a468d3437296 rtmutex: export lockdep-less version of rt_mutex's lock, trylock and unlock
pick 58790944fce8 rtmutex: add sleeping lock implementation
pick 052a52983b60 rtmutex: add mutex implementation based on rtmutex
pick b4235746586d rtmutex: add rwsem implementation based on rtmutex
pick 24d8016ec9e5 rtmutex: add rwlock implementation based on rtmutex
OK 122889823 pick e5c0eab8e437 rtmutex/rwlock: preserve state like a sleeping lock
pick 3bc0aceff337 rtmutex: wire up RT's locking
pick a7d5da8792ca rtmutex: add ww_mutex addon for mutex-rt
pick f9bde2392945 kconfig: Add PREEMPT_RT_FULL
pick 574150d18d52 locking/rt-mutex: fix deadlock in device mapper / block-IO
pick fabe7e1f9cc8 locking/rt-mutex: Flush block plug on __down_read()
pick 461cea5862c2 locking/rtmutex: re-init the wait_lock in rt_mutex_init_proxy_locked()
pick 17dc818f1b09 ptrace: fix ptrace vs tasklist_lock race
pick e4eb4b5f10c3 rtmutex: annotate sleeping lock context
pick 833397adc966 sched/migrate_disable: fallback to preempt_disable() instead barrier()
pick a08b762ef304 locking: don't check for __LINUX_SPINLOCK_TYPES_H on -RT archs
pick 6cb3f91b9265 rcu: Frob softirq test
pick 050e3ab7293e rcu: Merge RCU-bh into RCU-preempt
pick d1f13f5715ff rcu: Make ksoftirqd do RCU quiescent states
pick 68e8f96963a0 rcu: Eliminate softirq processing from rcutree
pick c107e3408262 srcu: use cpu_online() instead custom check
pick 80dd78936722 srcu: replace local_irqsave() with a locallock
pick a1ea3f3b5d80 rcu: enable rcu_normal_after_boot by default for RT
pick 6e1f123fe270 tty/serial/omap: Make the locking RT aware
pick 53a1138616f2 tty/serial/pl011: Make the locking work on RT
pick f9f8eec35d32 tty: serial: pl011: explicitly initialize the flags variable
pick 846b95cf90a9 rt: Improve the serial console PASS_LIMIT
pick cd9897a02ce8 tty: serial: 8250: don't take the trylock during oops
pick 4d83234e6b83 locking/percpu-rwsem: Remove preempt_disable variants
pick 6c8fe3277d4b mm: Protect activate_mm() by preempt_[disable&enable]_rt()
pick 224aa887839e fs/dcache: bring back explicit INIT_HLIST_BL_HEAD init
pick a19ccfffd6fe fs/dcache: disable preemption on i_dir_seq's write side
pick 242dc74c7ba0 squashfs: make use of local lock in multi_cpu decompressor
pick efae64412664 thermal: Defer thermal wakups to threads
pick bd6193758b42 x86/fpu: Disable preemption around local_bh_disable()
pick 57754daf7ab5 fs/epoll: Do not disable preemption on RT
pick 5ba09ebcdb9d mm/vmalloc: Another preempt disable region which sucks
pick 2a14fc037798 block: mq: use cpu_light()
pick 44cb8f829fe8 block/mq: do not invoke preempt_disable()
pick 1a0cbc8049b7 block/mq: don't complete requests via IPI
pick 7e2a9e291159 md: raid5: Make raid5_percpu handling RT aware
pick 41f7be6a0bf6 rt: Introduce cpu_chill()
pick b4dc21395a7d hrtimer: Don't lose state in cpu_chill()
pick fd29abae38fa hrtimer: cpu_chill(): save task state in ->saved_state()
pick a7edd04c85ab block: blk-mq: move blk_queue_usage_counter_release() into process context
pick 10c92f60395f block: Use cpu_chill() for retry loops
pick 68d5f72f6c39 fs: dcache: Use cpu_chill() in trylock loops
pick 7c5378410371 net: Use cpu_chill() instead of cpu_relax()
pick 96b93ac4f9ec fs/dcache: use swait_queue instead of waitqueue
pick 0d6428e557f2 workqueue: Use normal rcu
pick 46cdd4ce2bb4 workqueue: Use local irq lock instead of irq disable regions
pick e4771b3b1d75 workqueue: Prevent workqueue versus ata-piix livelock
pick 7f4d1437fd83 sched: Distangle worker accounting from rqlock
pick de5794c17deb debugobjects: Make RT aware
pick 5335646d22e8 seqlock: Prevent rt starvation
pick e533ff2a5246 sunrpc: Make svc_xprt_do_enqueue() use get_cpu_light()
pick 5e479879d1ce net: Use skbufhead with raw lock
pick b47b2fbf67cc net: move xmit_recursion to per-task variable on -RT
pick bd774d290977 net: provide a way to delegate processing a softirq to ksoftirqd
pick 2f116045c3f1 net: dev: always take qdisc's busylock in __dev_xmit_skb()
pick 29dbfaac29c5 net/Qdisc: use a seqlock instead seqcount
pick c7968ed6b615 net: add back the missing serialization in ip_send_unicast_reply()
pick e5113ce66c06 net: add a lock around icmp_sk()
pick 2432ee4bae6c net: Have __napi_schedule_irqoff() disable interrupts on RT
pick fc9f4631a290 irqwork: push most work into softirq context
pick 04a1e1f2aa0d printk: Make rt aware
pick db508d28536f kernel/printk: Don't try to print from IRQ/NMI region
pick 502f80cc6396 printk: Drop the logbuf_lock more often
pick 1f904a831f47 ARM: enable irq in translation/section permission fault handlers
pick d57873234f4e genirq: update irq_set_irqchip_state documentation
pick 1587d9b527d1 KVM: arm/arm64: downgrade preempt_disable()d region to migrate_disable()
pick 9ad729bda0ad arm64: fpsimd: use preemp_disable in addition to local_bh_disable()
pick 9ea835e7e222 kgdb/serial: Short term workaround
pick 0def4cfed4bc sysfs: Add /sys/kernel/realtime entry
pick d6559d05ba28 mm, rt: kmap_atomic scheduling
pick 172af478fc0a x86/highmem: Add a "already used pte" check
pick aedd824e87cb arm/highmem: Flush tlb on unmap
pick 9e106bc3892f arm: Enable highmem for rt
pick 94434f02bd40 scsi/fcoe: Make RT aware.
pick 663928d94580 x86: crypto: Reduce preempt disabled regions
pick 9e1183c96782 crypto: Reduce preempt disabled regions, more algos
pick 6960b353f03e crypto: limit more FPU-enabled sections
pick 685152deb622 crypto: scompress - serialize RT percpu scratch buffer access with a local lock
pick 6ac01984f2a0 crypto: cryptd - add a lock instead preempt_disable/local_bh_disable
pick 83c5815df005 panic: skip get_random_bytes for RT_FULL in init_oops_id
pick 04c6848abe95 x86: stackprotector: Avoid random pool on rt
pick d259cd9b1528 random: Make it work on rt
pick 2330ffd2ea17 cpu/hotplug: Implement CPU pinning
pick f51c291d7a8c sched: Allow pinned user tasks to be awakened to the CPU they pinned
pick 446d3b598f46 hotplug: duct-tape RT-rwlock usage for non-RT
pick 6fdea4f75772 net: Remove preemption disabling in netif_rx()
pick 33b361abdc67 net: Another local_irq_disable/kmalloc headache
pick 1ed4955c1659 net/core: protect users of napi_alloc_cache against reentrance
pick 31eac99e4c99 net: netfilter: Serialize xt_write_recseq sections on RT
pick e0e7b52f8feb net: Add a mutex around devnet_rename_seq
pick e21468d9dbb3 lockdep: selftest: Only do hardirq context test for raw spinlock
pick c98e1e1915e3 lockdep: selftest: fix warnings due to missing PREEMPT_RT conditionals
pick 1d80dd375f75 sched: Add support for lazy preemption
pick 526627fd4828 ftrace: Fix trace header alignment
pick 150dab4d290c x86: Support for lazy preemption
pick 04dc4533ed20 x86: lazy-preempt: properly check against preempt-mask
pick 4902852b7e48 x86: lazy-preempt: use proper return label on 32bit-x86
OK pick 948b7cfa39b0 arm: Add support for lazy preemption
pick 7628f6397275 powerpc: Add support for lazy preemption
pick 68e2b1f77c5d arch/arm64: Add lazy preempt support
pick 829e7d2af839 connector/cn_proc: Protect send_msg() with a local lock on RT
pick bab609040081 drivers/block/zram: Replace bit spinlocks with rtmutex for -rt
pick 253dccd9c822 drivers/zram: Don't disable preemption in zcomp_stream_get/put()
pick 6e581927b8a9 drivers/zram: fix zcomp_stream_get() smp_processor_id() use in preemptible code
pick a578207ba92a tpm_tis: fix stall after iowrite*()s
pick 5dbe4296d49c watchdog: prevent deferral of watchdogd wakeup on RT
pick 2076de67abf9 drm,radeon,i915: Use preempt_disable/enable_rt() where recommended
pick 0f3bcd6901e0 drm,i915: Use local_lock/unlock_irq() in intel_pipe_update_start/end()
pick 2089f853a8c3 drm/i915: disable tracing on -RT
pick c82fe0af5e58 drm/i915: skip DRM_I915_LOW_LEVEL_TRACEPOINTS with NOTRACE
pick 37925bf71573 cgroups: use simple wait in css_release()
pick c5eda0594d49 cpuset: Convert callback_lock to raw_spinlock_t
pick 756433e002d9 apparmor: use a locallock instead preempt_disable()
pick 73c433d86e25 workqueue: Prevent deadlock/stall on RT
pick 35bc2a5af2fe signals: Allow rt tasks to cache one sigqueue struct
pick 42c2f9cb1122 Add localversion for -RT release
pick 85773be1821e powerpc/pseries/iommu: Use a locallock instead local_irq_save()
pick 2667064a1f3f powerpc: reshuffle TIF bits
pick 55f7a7895171 tty/sysrq: Convert show_lock to raw_spinlock_t
pick b7cd1dad634c drm/i915: Don't disable interrupts independently of the lock
pick 066e20ff7b54 sched/completion: Fix a lockup in wait_for_completion()
pick 54498c787596 kthread: add a global worker thread.
pick 80d5e2935a6c genirq: Do not invoke the affinity callback via a workqueue on RT
pick f9d3f116e098 genirq: Handle missing work_struct in irq_set_affinity_notifier()
pick e2c1e143e74a arm: imx6: cpuidle: Use raw_spinlock_t
OK 122904930 / 122959477 pick 69aa73357e6a rcu: Don't allow to change rcu_normal_after_boot on RT
bad? 122951549 bad? 126355890 real failure when entering usersace pick 849ef8789077 pci/switchtec: fix stream_open.cocci warnings
pick ad8a5e8279c4 sched/core: Drop a preempt_disable_rt() statement
bad? 122942465 pick 966f066d96cb timers: Redo the notification of canceling timers on -RT
pick 0393fd5a4f9a Revert "futex: Ensure lock/unlock symetry versus pi_lock and hash bucket lock"
pick 84eb0b64a27a Revert "futex: Fix bug on when a requeued RT task times out"
pick fcc893280f4e Revert "rtmutex: Handle the various new futex race conditions"
pick 2eac93cf9d16 Revert "futex: workaround migrate_disable/enable in different context"
pick 9b8964629f4f futex: Make the futex_hash_bucket lock raw
pick cc1812bf198b futex: Delay deallocation of pi_state
bad? pick f5e115c43100 mm/zswap: Do not disable preemption in zswap_frontswap_store()
pick e0d0d09a08ad revert-aio
pick a0a40bfb4300 fs/aio: simple simple work
pick 0fae581d8c5e revert-thermal
pick c0d95b4a8a1b thermal: Defer thermal wakups to threads
pick 700fbb4afb6e revert-block
pick 4cda50ff12cf block: blk-mq: move blk_queue_usage_counter_release() into process context
pick 9e982f55745b workqueue: rework
pick c0db53dc3bf4 i2c: exynos5: Remove IRQF_ONESHOT
pick 1f160d170203 i2c: hix5hd2: Remove IRQF_ONESHOT
BAD 122882826 eae5a7cab722 sched/deadline: Ensure inactive_timer runs in hardirq context
pick 6249683b77f6 thermal/x86_pkg_temp: make pkg_temp_lock a raw spinlock
pick 956a5c214a5b dma-buf: Use seqlock_t instread disabling preemption
pick 94f6fa62de56 KVM: arm/arm64: Let the timer expire in hardirq context on RT
pick b1a74023533a x86: preempt: Check preemption level before looking at lazy-preempt
pick 1bdbd966d713 hrtimer: Use READ_ONCE to access timer->base in hrimer_grab_expiry_lock()
pick b87859791ff6 hrtimer: Don't grab the expiry lock for non-soft hrtimer
pick cc6c170874b9 hrtimer: Prevent using hrtimer_grab_expiry_lock() on migration_base
pick d5b21b1a259f hrtimer: Add a missing bracket and hide `migration_base' on !SMP
pick 6bc5d45d9c6f posix-timers: Unlock expiry lock in the early return
pick 05c2db84cb7a sched: migrate_dis/enable: Use sleeping_lock…() to annotate sleeping points
pick c282770121a7 sched: __set_cpus_allowed_ptr: Check cpus_mask, not cpus_ptr
pick e4f2a78d7ddb sched: Remove dead __migrate_disabled() check
pick 1a7d39dc51d2 sched: migrate disable: Protect cpus_ptr with lock
pick dda8037814c5 lib/smp_processor_id: Don't use cpumask_equal()
pick a7307f4e5926 futex: Make the futex_hash_bucket spinlock_t again and bring back its old state
pick dad5e45d6919 locking/rtmutex: Clean ->pi_blocked_on in the error case
pick de2975927caf lib/ubsan: Don't seralize UBSAN report
pick 48b199bebe5c kmemleak: Change the lock of kmemleak_object to raw_spinlock_t
pick 7a67c9eb660a sched: migrate_enable: Use select_fallback_rq()
pick 46f7b9689c65 sched: Lazy migrate_disable processing
pick 7bcbdecb866e sched: migrate_enable: Use stop_one_cpu_nowait()
pick 0c78796b3b3c Revert "ARM: Initialize split page table locks for vector page"
pick 984f60beac6e locking: Make spinlock_t and rwlock_t a RCU section on RT
pick bdaac02765af sched/core: migrate_enable() must access takedown_cpu_task on !HOTPLUG_CPU
pick 041a0825cc80 lib/smp_processor_id: Adjust check_preemption_disabled()
pick 0aafa6ab4265 sched: migrate_enable: Busy loop until the migration request is completed
pick 08447476459e Linux 4.19.106-rt44 REBASE


--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany


Re: CIP IRC weekly meeting today

masashi.kudo@...
 

Hi, Iwamatsu-san,

Thanks for your updates! Also thanks for your offer about #AI-2!
We will discuss this in the IRC.

Best regards,
--
M. Kudo

-----Original Message-----
From: nobuhiro1.iwamatsu@toshiba.co.jp <nobuhiro1.iwamatsu@toshiba.co.jp>
Sent: Thursday, March 19, 2020 5:17 PM
To: 工藤 雅司(CTJ) <masashi.kudo@cybertrust.co.jp>; cip-dev@lists.cip-project.org
Subject: RE: CIP IRC weekly meeting today

Hi Kudo-san,

I can't attend IRC meetings today.

-----Original Message-----
From: cip-dev [mailto:cip-dev-bounces@lists.cip-project.org] On Behalf
Of masashi.kudo@cybertrust.co.jp
Sent: Thursday, March 19, 2020 7:36 AM
To: cip-dev@lists.cip-project.org
Subject: [cip-dev] CIP IRC weekly meeting today

Hi all,

Kindly be reminded to attend the weekly meeting through IRC to discuss
technical topics with CIP kernel today.

*Please note that the IRC meeting was rescheduled to UTC (GMT) 09:00
starting from the first week of Apr. according to TSC meeting*
https://www.timeanddate.com/worldclock/meetingdetails.html?year=2020
&month=3&day=19&hour=9&min=0&sec=0&p1=224&p2=179&p3=136&p4=37&p5=241
&p6=248

US-West US-East UK DE TW JP
02:00 05:00 09:00 10:00 17:00 18:00

Channel:
* irc:chat.freenode.net:6667/cip

Last meeting minutes:
https://irclogs.baserock.org/meetings/cip/2020/03/cip.2020-03-12-09.
00.log.html

Agenda:

* Action item
1. Combine root filesystem with kselftest binary - Iwamatsu-san
No update.

2. Assign the owner of "CIP kernel config" - masashi910
Note; If no one is owner, I can do it.

3. Strengthen sustainable
process to backport patches from Mainline/LTS - Kernel Team 3-1.
Workflow for identifying important fixes, backporting, and reviewing
them 3-2. Prepare the tools to be used for this workflow 3-3. Get
practice in backporting patches 4. Upload a guideline for reference
hardware platform addition - masashi910

* Kernel maintenance updates
I was late, I released new CIP kernels.
https://lists.cip-project.org/pipermail/cip-dev/2020-March/004516.html

* Kernel testing
* CIP Core
* Software update
* AOB
1. Summer Time
US summer time started on March 8. CEST starts on March 29.
This IRC meeting starts at UTC (GMT) 09:00.

The meeting will take 30 min, although it can be extended to an hour
if it makes sense and those involved in the topics can stay.
Otherwise, the topic will be taken offline or in the next meeting.

Best regards,
Best regards,
Nobuhiro


Re: CIP IRC weekly meeting today

Nobuhiro Iwamatsu
 

Hi Kudo-san,

I can't attend IRC meetings today.

-----Original Message-----
From: cip-dev [mailto:cip-dev-bounces@lists.cip-project.org] On Behalf
Of masashi.kudo@cybertrust.co.jp
Sent: Thursday, March 19, 2020 7:36 AM
To: cip-dev@lists.cip-project.org
Subject: [cip-dev] CIP IRC weekly meeting today

Hi all,

Kindly be reminded to attend the weekly meeting through IRC to discuss
technical topics with CIP kernel today.

*Please note that the IRC meeting was rescheduled to UTC (GMT) 09:00
starting from the first week of Apr. according to TSC meeting*
https://www.timeanddate.com/worldclock/meetingdetails.html?year=2020
&month=3&day=19&hour=9&min=0&sec=0&p1=224&p2=179&p3=136&p4=37&p5=241
&p6=248

US-West US-East UK DE TW JP
02:00 05:00 09:00 10:00 17:00 18:00

Channel:
* irc:chat.freenode.net:6667/cip

Last meeting minutes:
https://irclogs.baserock.org/meetings/cip/2020/03/cip.2020-03-12-09.
00.log.html

Agenda:

* Action item
1. Combine root filesystem with kselftest binary - Iwamatsu-san
No update.

2. Assign the owner of "CIP kernel config" - masashi910
Note; If no one is owner, I can do it.

3. Strengthen sustainable
process to backport patches from Mainline/LTS - Kernel Team 3-1.
Workflow for identifying important fixes, backporting, and reviewing them
3-2. Prepare the tools to be used for this workflow 3-3. Get practice
in backporting patches 4. Upload a guideline for reference hardware
platform addition - masashi910

* Kernel maintenance updates
I was late, I released new CIP kernels.
https://lists.cip-project.org/pipermail/cip-dev/2020-March/004516.html

* Kernel testing
* CIP Core
* Software update
* AOB
1. Summer Time
US summer time started on March 8. CEST starts on March 29.
This IRC meeting starts at UTC (GMT) 09:00.

The meeting will take 30 min, although it can be extended to an hour if
it makes sense and those involved in the topics can stay. Otherwise, the
topic will be taken offline or in the next meeting.

Best regards,
Best regards,
Nobuhiro


[ANNOUNCE] Release v4.19.109-cip22 and v4.4.216-cip43

Nobuhiro Iwamatsu
 

Hi all,

CIP kernel team has released Linux kernel v4.19.109-cip22 and v4.4.216-cip43.
Release was delayed due to test confirmation delay, sorry.

The linux-4.19.y-cip tree has been updated base version from v4.19.106 to v4.19.109,
and linux-4.4.y-cip tree has been updated base version from v4.4.213 to v4.4.216.

You can get this release via the git tree at:

v4.19.109-cip22:
repository:
https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git
branch:
linux-4.19.y-cip
commit hash:
94c283d68eaf9e242105a4516a00a516068c61da
added commits:
CIP: Bump version suffix to -cip22 after merge from stable

v4.4.216-cip43:
repository:
https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git
branch:
linux-4.4.y-cip
commit hash:
0e44e8ae8f3be94257c32a69400a69eea9ff5cb1
added commits:
CIP: Bump version suffix to -cip43 after merge from stable

Best regards,
Nobuhiro

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