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Message-Id: <201201291655.17056.Martin@lichtvoll.de>
Date: Sun, 29 Jan 2012 16:55:16 +0100
From: Martin Steigerwald <Martin@...htvoll.de>
To: "Rafael J. Wysocki" <rjw@...k.pl>
Cc: Linux PM list <linux-pm@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>, Jan Kara <jack@...e.cz>,
linux-fsdevel@...r.kernel.org, Dave Chinner <david@...morbit.com>,
Nigel Cunningham <nigel@...onice.net>,
Pavel Machek <pavel@....cz>,
"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Subject: Re: [RFC][PATCH] PM / Sleep: Freeze filesystems during system suspend/hibernation
Am Samstag, 28. Januar 2012 schrieb Rafael J. Wysocki:
> From: Rafael J. Wysocki <rjw@...k.pl>
>
> Freeze all filesystems during system suspend and (kernel-driven)
> hibernation by calling freeze_supers() for all superblocks and thaw
> them during the subsequent resume with the help of thaw_supers().
>
> This makes filesystems stay in a consistent state in case something
> goes wrong between system suspend (or hibernation) and the subsequent
> resume (e.g. journal replays won't be necessary in those cases). In
> particular, this should help to solve a long-standing issue that, in
> some cases, during resume from hibernation the boot loader causes the
> journal to be replied for the filesystem containing the kernel image
replied => replayed
> and/or initrd causing it to become inconsistent with the information
> stored in the hibernation image.
Thanks,
--
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7
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