From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Pavel Machek <pavel@ucw.cz>
Subject: Re: hibernation issue with kernel 2.6.23-gentoo-r3 at T41
Date: Sun, 9 Dec 2007 22:50:07 +0100
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Cc: Toralf =?iso-8859-1?q?F=F6rster?= <toralf.foerster@gmx.de>,
       Daniel Drake <dsd@gentoo.org>, linux-kernel@vger.kernel.org
References: <200712031419.41596.toralf.foerster@gmx.de> <200712092231.41064.rjw@sisk.pl> <20071209212132.GB24284@elf.ucw.cz>
In-Reply-To: <20071209212132.GB24284@elf.ucw.cz>
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On Sunday, 9 of December 2007, Pavel Machek wrote:
> On Sun 2007-12-09 22:31:40, Rafael J. Wysocki wrote:
> > On Sunday, 9 of December 2007, Pavel Machek wrote:
> > > On Mon 2007-12-03 22:54:23, Rafael J. Wysocki wrote:
> > > > On Monday, 3 of December 2007, Toralf F?rster wrote:
> > > > > Hhm,
> > > > > 
> > > > > in general it seems to be a regression of kernel 2.6.23 with suspend/hibernate
> > > > > if a user mode linux image is runnning.
> > > > > 
> > > > > With previous kernel versions (tested gentoo-sources-2.6.22-r9 and 
> > > > > gentoo-sources-2.6.21-r4) I've no problem to either suspend or to hibernate the
> > > > > ThinkPad T41.
> > > > > 
> > > > > However with gentoo-sources-2.6.23-r3 the system didn't neither
> > > > > suspend nor hibernate. The good news is that the system doesn't hang :-)
> > > >  
> > > > Please file a bug report at
> > > > http://bugzilla.kernel.org/enter_bug.cgi?product=Power%20Management
> > > > against Hibernation/Suspend and add my address to the report's CC list.
> > > 
> > > I smell refrigerator problem; can you suspend if you SIGSTOP your uml,
> > > first?
> > 
> > That might be, but the issue is apparently fixed in 2.6.24-rc and I'm
> > struggling to figure out how the !@#$%^ (please see
> > http://bugzilla.kernel.org/show_bug.cgi?id=9501).
> 
> No idea... I'm glad its fixed :-). Maybe someone fixed uninterruptible
> sleep somewhere in ptrace...

Yeah, but we should find a -stable fix, if possible.

Greetings,
Rafael
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