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

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Message-ID: <20081110082802.GA22392@elte.hu>
Date:	Mon, 10 Nov 2008 09:28:02 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Pavel Machek <pavel@...e.cz>,
	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


* KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:

> On Mon, 10 Nov 2008 08:55:29 +0100
> 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.
> > 									Pavel
> 
> How about this patch ?
> ==
> http://marc.info/?l=linux-mm-commits&m=122624388629106&w=2
> ==

note, that fix of Rafael's is now upstream as:

  c5d7124: Fix __pfn_to_page(pfn) for CONFIG_DISCONTIGMEM=y

and included in v2.6.28-rc4.

But yes, this area of code (the save/restore of memory maps) would be 
the main suspect to investigate.

	Ingo
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