From patchwork Wed Sep  7 16:45:34 2011
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Subject: [BUG] ext3: cannot unfreeze a filesystem due to a deadlock
Date: Wed, 07 Sep 2011 06:45:34 -0000
From: Greg Freemyer <greg.freemyer@gmail.com>
X-Patchwork-Id: 113797
Message-Id: <CAGpXXZL=+K0ETvM0kGE6zqe3pB7AS_exU+dCbpm+uUSG2JJ+0A@mail.gmail.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Masayoshi MIZUMA <m.mizuma@jp.fujitsu.com>, Jan Kara <jack@suse.cz>,
 Andrew Morton <akpm@linux-foundation.org>,
 Andreas Dilger <adilger.kernel@dilger.ca>,
 linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org

On Wed, Sep 7, 2011 at 2:40 AM, Christoph Hellwig <hch@infradead.org> wrote:
> On Wed, Sep 07, 2011 at 12:29:30PM +0900, Masayoshi MIZUMA wrote:
>> Hi,
>>
>> When I checked the freeze feature for ext3 filesystem using fsfreeze
>> command at 3.1.0-rc4, I think the following deadlock problem happened.
>>
>> How to reproduce:
>>  # mkfs -t ext3 /dev/sdd1
>>  # mount /dev/sdd1 /MNT
>>  # ./fsstress -d /MNT/tmp -n 10 -p 1000 > /dev/null 2>&1 &
>>  # fsfreeze -f /MNT
>>  # fsfreeze -u /MNT
>
> Can you add this testcase to xfstests?

Christoph,

Isn't that just a matter of extending test 068 to ext4

====

That's a totally untested patch if someone wants to try it.

Greg

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====
--- 068 2011-06-30 18:41:17.000000000 -0400
+++ 068.new     2011-09-07 12:41:35.000000000 -0400
@@ -51,7 +51,7 @@
 . ./common.filter

 # real QA test starts here
-_supported_fs xfs
+_supported_fs xfs ext3 ext4
 _supported_os Linux IRIX

 _require_scratch