linux-kernel - Re: [PATCH 00/19] Fix filesystem freezing deadlocks

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Message-ID: <1331497364.4641.86.camel@fourier>
Date:	Sun, 11 Mar 2012 13:22:44 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	Jan Kara <jack@...e.cz>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-fsdevel@...r.kernel.org,
	Al Viro <viro@...IV.linux.org.uk>,
	Christoph Hellwig <hch@...radead.org>, dchinner@...hat.com,
	sandeen@...hat.com, Alex Elder <elder@...nel.org>,
	Anton Altaparmakov <anton@...era.com>, Ben Myers <bpm@....com>,
	Chris Mason <chris.mason@...cle.com>, cluster-devel@...hat.com,
	"David S. Miller" <davem@...emloft.net>,
	fuse-devel@...ts.sourceforge.net,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Joel Becker <jlbec@...lplan.org>,
	KONISHI Ryusuke <konishi.ryusuke@....ntt.co.jp>,
	linux-btrfs@...r.kernel.org, linux-ext4@...r.kernel.org,
	linux-nfs@...r.kernel.org, linux-nilfs@...r.kernel.org,
	linux-ntfs-dev@...ts.sourceforge.net,
	Mark Fasheh <mfasheh@...e.com>,
	Miklos Szeredi <miklos@...redi.hu>, ocfs2-devel@....oracle.com,
	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
	Steven Whitehouse <swhiteho@...hat.com>,
	Theodore Ts'o <tytso@....edu>, xfs@....sgi.com
Subject: Re: [PATCH 00/19] Fix filesystem freezing deadlocks

On Mon, 2012-03-05 at 17:00 +0100, Jan Kara wrote:
> Hallelujah,
> 
>   after a couple of weeks and several rewrites, here comes the third iteration
> of my patches to improve filesystem freezing.  [...]

We've been testing this patch set at Canonical on the multipath failover
SAN configuration where we originally encountered the freeze deadlock.
We are happy to report that it does appear to fix the problem.  Thanks
Jan!

Please add the following endorsements for these patches (those actually
exercised by our test case):  01, 02, 03, 06, 07, 08, 09, 10, 14, 18, 19

BugLink: https://bugs.launchpad.net/bugs/897421
Tested-by: Kamal Mostafa <kamal@...onical.com>
Tested-by: Peter M. Petrakis <peter.petrakis@...onical.com>
Tested-by: Dann Frazier <dann.frazier@...onical.com>
Tested-by: Massimo Morana <massimo.morana@...onical.com>

 -Kamal


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