linux-kernel - Re: 2.6.31 regression: programs crashing after a couple of days of uptime with hibernation

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Message-Id: <201004021858.28611.rjw@sisk.pl>
Date:	Fri, 2 Apr 2010 18:58:28 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Ondrej Zary <linux@...nbow-software.org>
Cc:	linux-kernel@...r.kernel.org,
	pm list <linux-pm@...ts.linux-foundation.org>
Subject: Re: 2.6.31 regression: programs crashing after a couple of days of uptime with hibernation

On Friday 02 April 2010, Ondrej Zary wrote:
> On Friday 02 April 2010 00:33:55 Rafael J. Wysocki wrote:
> > On Friday 02 April 2010, Ondrej Zary wrote:
> > > On Thursday 01 April 2010 23:45:33 you wrote:
> > > > On Thursday 01 April 2010, Ondrej Zary wrote:
> > > > > Hello,
> > > > > with kernel 2.6.30, I can have uptime of more than a month on my
> > > > > desktop PC (with hibernation). It's impossible with 2.6.31. After 1
> > > > > to 3 days, processes that were running during hibernation (e.g.
> > > > > konsole, kwin, kicker, xorg) start to crash randomly in very weird
> > > > > ways. The kernel itself does not seem to crash. When I run the
> > > > > crashed program again, it seems to work. Looks like some memory
> > > > > corruption.
> > > > >
> > > > > This bug is also present in 2.6.32 and 2.6.33.
> > > >
> > > > Is the kernel 32-bit or 64-bit?  What kind of CPU is there in the box?
> > >
> > > It's old 32-bit i686 CPU - Cyrix MII.
> >
> > Please try with this patch applied:
> > http://git.kernel.org/?p=linux/kernel/git/mingo/linux-2.6-x86.git;a=patch;h
> >=8ae06d223f8203c72104e5c0c4ee49a000aedb42
> 
> Thanks, I'll try it. But I doubt that it will fix the problem. There were no 
> changes in hibernate_asm_32.S between 2.6.30 and 2.6.31.

The change that exposed this issue was elsewhere in the x86 arch code.  I don't
know where exactly, but we surely didn't need the above patch before.

Rafael
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