From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753352Ab2A2PzU (ORCPT ); Sun, 29 Jan 2012 10:55:20 -0500 Received: from mondschein.lichtvoll.de ([194.150.191.11]:36860 "EHLO mail.lichtvoll.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752660Ab2A2PzS (ORCPT ); Sun, 29 Jan 2012 10:55:18 -0500 From: Martin Steigerwald To: "Rafael J. Wysocki" Subject: Re: [RFC][PATCH] PM / Sleep: Freeze filesystems during system suspend/hibernation Date: Sun, 29 Jan 2012 16:55:16 +0100 User-Agent: KMail/1.13.7 (Linux/3.2.0-1-amd64; KDE/4.7.4; x86_64; ; ) Cc: Linux PM list , LKML , Jan Kara , linux-fsdevel@vger.kernel.org, Dave Chinner , Nigel Cunningham , Pavel Machek , "Srivatsa S. Bhat" References: <201201281445.49377.rjw@sisk.pl> (sfid-20120128_144852_208795_82DBB4A2) In-Reply-To: <201201281445.49377.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201201291655.17056.Martin@lichtvoll.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Samstag, 28. Januar 2012 schrieb Rafael J. Wysocki: > From: Rafael J. Wysocki > > 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