linux-kernel - Re: CONFIG_NUMA breaks hibernation on x86-32 with PAE

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Date:	Mon, 10 Nov 2008 09:04:36 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Pavel Machek <pavel@...e.cz>
Cc:	kernel list <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, "H. Peter Anvin" <hpa@...or.com>
Subject: Re: CONFIG_NUMA breaks hibernation on x86-32 with PAE


* Pavel Machek <pavel@...e.cz> wrote:

> > 
> > * Pavel Machek <pavel@...e.cz> wrote:
> > 
> > > ...at least on 2.6.27 and 2.6.28-rc3. Resume gets to 
> > > acpi_hibernation_leave, then SLAB corruption is detected and machine 
> > > ends in series of oops.
> > > 
> > > Any ideas how to debug that?
> > 
> > do you get any serial log or USB key output, so that it's debuggable 
> > directly?
> 
> Well, I can transcribe the BUG() from a picture, I guess, but it does
> not seem to contain much useful info: SLAB corruption was detected and
> backtrace is not quite important at that point...
> 
> Serial console is probably possible, but would take few days to setup.

No good ideas - the bug description gives me the impression of memory 
maps save/restore hickup in the hibernation code - and memory maps are 
pretty much the only thing that are significantly different on NUMA. 
(amongst the things that would matter to hibernation - there's a lot 
more other NUMA details)

In any case, could you send the .config that fails please, so that 
this is documented better?

	Ingo
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