From: Jan Kara <jack@suse.cz>
To: Zheng Liu <gnehzuil.liu@gmail.com>
Cc: linux-ext4@vger.kernel.org, Theodore Ts'o <tytso@mit.edu>
Subject: Re: [BUG] xfstests #68 with data=journal hang against 3.8-rc7 and 'dev' branch
Date: Tue, 19 Feb 2013 09:55:29 +0100 [thread overview]
Message-ID: <20130219085529.GA21945@quack.suse.cz> (raw)
In-Reply-To: <20130217172208.GB4059@gmail.com>
Hi,
On Mon 18-02-13 01:22:08, Zheng Liu wrote:
> Xfstests #68 will hang with data=journal in 3.8-rc7 and 'dev' branch. I
> remember that there has a patch for ext4 to fix filesystem freeze bug
> but I am not sure whether it can fix this bug and it has been applied
> into 'dev' branch. So I file this bug here.
Yes, I also recently hit this bug. I found that the root cause is that in
data=journal mode there are dirty pages even after syncing the whole
filesystem. I didn't yet found out why that happens but dirty page handling
is complex in data=journal mode as pages get marked dirty at the moment
transaction is committing and buffers are filed into checkpoint lists so I
find it quite possible there is some case I didn't think about where
syncing results in non-clean filesystem.
Honza
--
Jan Kara <jack@suse.cz>
SUSE Labs, CR
next prev parent reply other threads:[~2013-02-19 9:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-17 17:22 [BUG] xfstests #68 with data=journal hang against 3.8-rc7 and 'dev' branch Zheng Liu
2013-02-18 5:04 ` Theodore Ts'o
2013-02-18 17:33 ` Zheng Liu
2013-02-19 19:57 ` Eric Whitney
2013-02-19 8:55 ` Jan Kara [this message]
2013-02-22 19:46 ` Theodore Ts'o
2013-02-26 18:49 ` Jan Kara
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