linux-kernel - Re: [2/2] 2.6.21-rc7: known regressions

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Date:	Sat, 21 Apr 2007 11:45:04 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Dave Jones <davej@...hat.com>, Adrian Bunk <bunk@...sta.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	pavel@...e.cz, linux-pm@...ts.osdl.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	"Eric W. Biederman" <ebiederm@...ssion.com>, gregkh@...e.de
Subject: Re: [2/2] 2.6.21-rc7: known regressions

On Saturday, 21 April 2007 02:02, Jeremy Fitzhardinge wrote:
> Dave Jones wrote:
> > On Fri, Apr 20, 2007 at 10:16:54AM -0700, Jeremy Fitzhardinge wrote:
> >  > Dave Jones wrote:
> >  > >  > Andi, I think.  I've got his firstfloor.org patches applied to this kernel.
> >  > >
> >  > > Ah, I saw you patched in CFS too, and thought it may be related.
> >  > >   
> >  > 
> >  > Well, I have CONFIG_FB_BACKLIGHT enabled, and it still works.
> >  > 
> >  > Maybe there's something in Andi's queue which is making it work?
> >
> > Shrug, I'm out of ideas.  I'm hoping that it'll magically start working
> > when people start flushing their git trees for .22
> > Maybe that'll yield a clue for something that can be backported to .21.x
> > because right now, I'm completely puzzled.
> 
> Well, it seemed reliable, but I just got a resume failure.  Different
> from any previous symptom I've seen:
> 
> Intel machine check architecture supported
> Intel machine check reporting enabled enabled on CPU#1
> Back to C!
> <hang>

Hmm, looks like something in device_power_up() went awry.  Probably in
sysdev_resume().

Greetings,
Rafael
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