linux-kernel - Re: pcmcia resume 60 second hang. Re: [patch 00/69] -stable review

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Message-ID: <20070530140739.GB29514@srcf.ucam.org>
Date:	Wed, 30 May 2007 15:07:39 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	nigel@...el.suspend2.net, Pavel Machek <pavel@....cz>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: pcmcia resume 60 second hang. Re: [patch 00/69] -stable review

On Wed, May 30, 2007 at 04:04:22PM +0200, Rafael J. Wysocki wrote:
> On Wednesday, 30 May 2007 15:17, Nigel Cunningham wrote:
> > On Wed, 2007-05-30 at 13:40 +0100, Matthew Garrett wrote:
> > > So keep the driver layers read-only and unfreeze the processes after 
> > > doing the atomic copy.
> > 
> > I know you probably won't care, but that's not an option for Suspend2 -
> > I get the possibility of a full image by overwriting LRU pages that were
> > saved prior to the atomic copy.
> 
> This generally is a problem, not only for suspend2. :-)
> 
> Once you've unfrozen the user land, we can't rely on the hibernation image any
> more, because some tasks may cause the on-disk filesystems' state to change.

Hence "keep the driver layers read-only" :) 

-- 
Matthew Garrett | mjg59@...f.ucam.org
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