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Date: Wed, 30 May 2007 15:07:39 +0100
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: nigel@nigel.suspend2.net, Pavel Machek <pavel@ucw.cz>,
       Linus Torvalds <torvalds@linux-foundation.org>,
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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@srcf.ucam.org
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