2016-03-03 16:40:43

by Michal Feix

[permalink] [raw]
Subject: Kernel stability on baytrail machines

Hello everyone,

aprox. 6 months ago I started facing random freezes on my baytrail based
computers I manage. It took me a while before I found a bug report in
freedesktop bugzilla named "complete freeze after: drm/i915/vlv: WA for
Turbo and RC6 to work together" -
https://bugs.freedesktop.org/show_bug.cgi?id=88012. It took a few more
months for this bug to escalate into MAJOR importance and was later
moved into kernel bugzilla as "intel_idle.max_cstate=1 required on
baytrail to prevent crashes" -
https://bugzilla.kernel.org/show_bug.cgi?id=109051.

Based on the ammount of comments in both bugtickets and probably
connected observations on different linux distros forums, this seems to
be a showstopper on mainstream Baytrail based machines for many users.
I'm trying to understand, how visible (and thus important) is this
instability across baytrail machines on linux kernel across population.

I do feel that the importance of the mentioned bug is currently
underestimated. Can anyone here give a note, how much current linux
kernel is supposed to be stable on general baytrail machines?

Cheers,

--
Michael


2016-04-09 16:01:24

by Pavel Machek

[permalink] [raw]
Subject: Re: Kernel stability on baytrail machines

Hi!

> aprox. 6 months ago I started facing random freezes on my baytrail
> based computers I manage. It took me a while before I found a bug
> report in freedesktop bugzilla named "complete freeze after:
> drm/i915/vlv: WA for Turbo and RC6 to work together" -
> https://bugs.freedesktop.org/show_bug.cgi?id=88012. It took a few
> more months for this bug to escalate into MAJOR importance and was
> later moved into kernel bugzilla as "intel_idle.max_cstate=1
> required on baytrail to prevent crashes" -
> https://bugzilla.kernel.org/show_bug.cgi?id=109051.
>
> Based on the ammount of comments in both bugtickets and probably
> connected observations on different linux distros forums, this seems
> to be a showstopper on mainstream Baytrail based machines for many
> users. I'm trying to understand, how visible (and thus important) is
> this instability across baytrail machines on linux kernel across
> population.
>
> I do feel that the importance of the mentioned bug is currently
> underestimated. Can anyone here give a note, how much current linux
> kernel is supposed to be stable on general baytrail machines?

If you did not get any replies... you might want to check MAINTAINERS file, and
put Intel x86 maintainers on Cc list.

I'm sure someone cares :-).
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

2016-04-09 19:14:31

by Alan Cox

[permalink] [raw]
Subject: Re: Kernel stability on baytrail machines

> > I do feel that the importance of the mentioned bug is currently
> > underestimated. Can anyone here give a note, how much current linux
> > kernel is supposed to be stable on general baytrail machines?
>
> If you did not get any replies... you might want to check MAINTAINERS file, and
> put Intel x86 maintainers on Cc list.
>
> I'm sure someone cares :-).

Yes we care, and there are people looking at the various reports.

Alan