linux-kernel - Re: Regressions w.r.t. suspend behaviour in recent kernel versions

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Message-Id: <20070905180143.b747f472.akpm@linux-foundation.org>
Date:	Wed, 5 Sep 2007 18:01:43 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Felix Homann <fexpop@...inehome.de>
Cc:	linux-kernel@...r.kernel.org, rjw@...k.pl, ak@...e.de
Subject: Re: Regressions w.r.t. suspend behaviour in recent kernel versions

> On Thu, 06 Sep 2007 00:51:50 +0200 Felix Homann <fexpop@...inehome.de> wrote:
> Andrew Morton wrote:
> >> On Fri, 24 Aug 2007 14:42:55 +0200 Felix Homann <fexpop@...inehome.de> wrote:
> > 
> > Nearly two weeks, zero replies.
> 
> Thanks for caring :-)
> 
> > 
> >> Aug  9 00:22:13 jawaka kernel: EXT3-fs: mounted filesystem with ordered
> >> data mode.
> >> Aug  9 00:22:13 jawaka kernel: WARNING: at kernel/irq/resend.c:70
> >> check_irq_resend()
> > 
> > I expect that got fixed in later kernels.
> 
> Yes, I've just tried 2.6.23-rc5-git1 and the warning has gone!
> 
> 
> >> Without the nolapic option the kernel will panic when trying to suspend 
> >> to disk.
> > 
> > A *large* number of people need noapic or nolapic to get Linux to work.
> 
> Even better, on 2.6.23-rc5-git1 I don't need nolapic anymore!
> 

damn, we break so much stuff that now we're breaking our old bugs too!

> 
> >> Here are the last lines of the kernel output:
> >>
> >> EIP: [<c01127fd> lapic_nmi_suspend+0x1d/0x30 ss:ESP 0068:c1ae3ec8
> >> Kernel panic - not syncing: Attempted to kill init!
> > 
> > Are you able to provide us with more information about this bug? 
> 
> If you're still interested in more more information now that the bug has 
> apparently been solved "en passant" I can take a photograph tomorrow. 
> Please, let me know.

No thanks, let's just move on..

> >> With more recent kernels the system will hang with 
> >> "Suspending console(s)".
> > 
> > My Vaio reliably hangs at the same place with 2.6.23-rc4.  I'll bisect that
> > next week sometime.  Hopefully the result of that effort will fix your bug.
> >  Please test Linus's tree regularly and don't let us release 2.6.23 until
> > it is fixed.
> 
> Great!
> 
> 
> >> 3. Even with the 2.6.18 kernel sound won't work after suspending to ram. 
> >> I don't know when this started, but I know that this has not been an 
> >> issue in the past.
> > 
> > Please provide full details in a separate bug report.  Send that report to
> > myself, linux-kernel@...r.kernel.org, Jaroslav Kysela <perex@...e.cz> and
> > Takashi Iwai <tiwai@...e.de>
> 
> I'll do that in the next couple of days.
> 

Thanks.
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