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From: Jan Kara <jack@suse.cz>
To: linux-fsdevel@vger.kernel.org
Cc: LKML <linux-kernel@vger.kernel.org>,
	linux-ext4@vger.kernel.org, xfs@oss.sgi.com,
	Eric Sandeen <sandeen@sandeen.net>,
	Dave Chinner <dchinner@redhat.com>,
	Surbhi Palande <csurbhi@gmail.com>,
	Kamal Mostafa <kamal@canonical.com>,
	Christoph Hellwig <hch@infradead.org>
Subject: [PATCH 0/4] Fix filesystem freezing
Date: Thu, 12 Jan 2012 02:20:49 +0100	[thread overview]
Message-ID: <1326331253-6497-1-git-send-email-jack@suse.cz> (raw)


  Hello,

  filesystem freezing is currently racy and thus we can end up with dirty data
on frozen filesystem (see changelog of the first patch for detailed race
description and proposed fix). This patch series aims at fixing this. So far I
did basic testing using UML linux (running fsstress and bash-shared-mapping
while doing freeze - sync (to deadlock on leftover dirty pages) - unfreeze) and
I'm not able to trigger dirty pages on frozen filesystem anymore. I plan to do
more testing on real machine tomorrow. Surbhi, Kamal, you were able to
reproduce deadlocks due to dirty data as well so please test these patches out.
Thanks. Also review of patches is welcome.

								Honza

             reply	other threads:[~2012-01-12  1:21 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-12  1:20 Jan Kara [this message]
2012-01-12  1:20 ` [PATCH 1/4] fs: Improve filesystem freezing handling Jan Kara
2012-01-12 19:53   ` Andreas Dilger
2012-01-12 20:07     ` Jan Kara
2012-01-12 22:57   ` Eric Sandeen
2012-01-12 23:15     ` Jan Kara
2012-01-13  1:26   ` Dave Chinner
2012-01-13 10:12     ` Jan Kara
2012-01-12  1:20 ` [PATCH 2/4] vfs: Protect write paths by sb_start_write - sb_end_write Jan Kara
2012-01-12 19:56   ` Andreas Dilger
2012-01-12 20:11     ` Jan Kara
2012-01-12  1:20 ` [PATCH 3/4] ext4: Protect ext4_page_mkwrite with " Jan Kara
2012-01-12  1:20 ` [PATCH 4/4] xfs: Protect xfs_file_aio_write() " Jan Kara
2012-01-12 21:29   ` Al Viro
2012-01-12 21:36     ` Jan Kara
2012-01-12  2:48 ` [PATCH 0/4] Fix filesystem freezing Dave Chinner
2012-01-12 11:30   ` Jan Kara
2012-01-13  0:09     ` Dave Chinner
2012-01-13 11:07       ` Jan Kara
2012-01-12 20:48 ` Ted Ts'o
2012-01-12 21:38   ` Jan Kara

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