Re: Kernel feature support

Jan Kiszka

On 2017-03-27 12:31, Gernot Hillier wrote:
On 15.03.2017 17:18, Agustin Benito Bethencourt wrote:

On 09/03/17 15:33, Ben Hutchings wrote:
We've previously agreed that not all kernel features (drivers,
filesystems, network protocols, etc.) can be supported in an SLTS
branch. I'd like to start working out what the supported features
should be for the 4.4 branch.

Are members able to share their kernel .config files, showing which
features are enabled? Or would you prefer to specify your needs at a
slightly higher level?
Answering this question is important to discard features in 4.4 that are
not of CIP interest so we can severely reduce the amount of effort that
we will need to do in terms of fixes analysis, security etc. in the future.

Please take some time to provide feedback.
Sorry for the late reply!
Fell through my cracks as well, just sending out another internal call
for more product configs. One is attached already, derived from

Please find attached an x86 kernel configuration from early product
development using kernel 4.4.

This product uses nearly-COTS server hardware due to needed computation
power, but also comes with nice embedded requirements like longterm
maintenance - and as a special need, real-time support, so we use
Linux-Ipipe/Xenomai here.

This means two things:
* many included drivers (especially in net and storage) are only
activated "to be prepared" for future hw replacements
* Feel free to either include Xenomai on your list as a used "kernel
feature" or to ignore the related options.
Xenomai is not in CIP scope right now (though Siemens would welcome
anyone interested in collaborating on it).

In general, anything in a config not part of upstream is filtered out
"automatically", I would say. There are switches for out-of-tree
features in the iot2000 config as well (we are still in the process of

So same as with the config from Hidehiro Kawai: please let me know if
you need prioritized list of drivers or other features!

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

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