Re: Memory corruption during hibernation since 2.6.31

[KAMEZAWA Hiroyuki]

On Thu, 29 Jul 2010 10:06:26 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote:

> On Wed, 28 Jul 2010 23:38:09 +0200
> Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx> wrote:
> 
> > On Wednesday 28 July 2010 23:34:07 Rafael J. Wysocki wrote:
> > > On Wednesday, July 28, 2010, Ondrej Zary wrote:
> > > > Hello,
> > > > after very long bisection, I finally found what's causing memory
> > > > corruption during hibernation on my machine sice 2.6.31:
> > > > https://bugzilla.kernel.org/show_bug.cgi?id=15753
> > > >
> > > > It's commit c9e444103b5e7a5a3519f9913f59767f92e33baf (mm: reuse unused
> > > > swap entry if necessary).
> > > >
> > > > I don't know anything about swapping in Linux so I don't have a clue
> > > > what's wrong with that commit.
> > >
> > > Thanks for bisecting!
> > >
> > > This looks rather serious.  I'd be grateful from any clues from the mm guys
> > > involved (CCed).
> > >
> > > Do you use s2disk or the built-in hibernation code?
> > 
> > I use built-in code (echo disk >/sys/power/state). The machine has 256MB RAM 
> > and 256MB swap partition.
> > 

BTW, what happens at resume ? How to page-in and remap ?

Thanks,
-Kame





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