linux-kernel - Re: [linux-pm] better oopsing when frozen

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Message-Id: <201107292229.02402.rjw@sisk.pl>
Date:	Fri, 29 Jul 2011 22:29:02 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	Pavel Machek <pavel@....cz>, linux-pm@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [linux-pm] better oopsing when frozen

On Friday, July 29, 2011, Oliver Neukum wrote:
> Am Freitag, 29. Juli 2011, 21:54:30 schrieb Pavel Machek:
> > On Mon 2011-07-25 10:43:19, Oliver Neukum wrote:
> > > Hi Rafael,
> > > 
> > > I had a problem with the kernel stopping the machine forever because I got an
> > > oops while tasks were frozen. It seems to me that we should thaw when this
> > > happens. How about this approach?
> > 
> > Danger, Will Robinson. You must not write to the filesystems after
> > hibernation started. By thawing, you may do just that.
> > 
> > It should be safe to thaw as long as final suspend signature is not
> > on disk and will not be written there.
> 
> Yes. But this applies only if I use kernel-space hibernation, doesn't it?
> So I need a second flag for the signature being written. Any other problem?

Yes, please see my reply to Pavel.

Thanks,
Rafael
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