From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jan Kucera <xatrix101@gmail.com>
Subject: Deadlock in dlmmaster.c
Date: Sun, 3 May 2009 22:33:18 +0200
Message-ID: <ef67228d0905031333i782ad1efhe532cd555e58b604@mail.gmail.com>
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary="===============1585850941476463681=="
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        ocfs2-devel@oss.oracle.com
To: mfasheh@suse.com, joel.becker@oracle.com
Return-path: <ocfs2-devel-bounces@oss.oracle.com>
List-Unsubscribe: <http://oss.oracle.com/mailman/listinfo/ocfs2-devel>,
	<mailto:ocfs2-devel-request@oss.oracle.com?subject=unsubscribe>
List-Archive: <http://oss.oracle.com/pipermail/ocfs2-devel>
List-Post: <mailto:ocfs2-devel@oss.oracle.com>
List-Help: <mailto:ocfs2-devel-request@oss.oracle.com?subject=help>
List-Subscribe: <http://oss.oracle.com/mailman/listinfo/ocfs2-devel>,
	<mailto:ocfs2-devel-request@oss.oracle.com?subject=subscribe>
Sender: ocfs2-devel-bounces@oss.oracle.com
Errors-To: ocfs2-devel-bounces@oss.oracle.com
List-Id: linux-fsdevel.vger.kernel.org

--===============1585850941476463681==
Content-Type: multipart/alternative; boundary=0016361e88909bedd9046907f549

--0016361e88909bedd9046907f549
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

Hi,

I've found some possible deadlock in fs/ocfs2/dlm/dlmmaster.c - version
2.6.28 (probably this code is in newer versions too).
Could someone confirm this? Thank you.


fs/ocfs2/dlm/dlmmaster.c
==================

function dlm_master_request_handler: (res->spinlock <- dlm->master_lock)
-----------------------------------
spin_lock(&res->spinlock); at line 1427
spin_lock(&dlm->master_lock); at line 1475

function dlm_migrate_request_handler: (dlm->master_lock <- res->spinlock)
-------------------------------------------------------
spin_lock(&dlm->master_lock) at line 3036
spin_lock(&res->spinlock); at line 3039



caught by Stanse
(http://iti.fi.muni.cz/stanse/)

--0016361e88909bedd9046907f549
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

Hi,<br><br>I&#39;ve found some possible deadlock in fs/ocfs2/dlm/dlmmaster.c - version 2.6.28 (probably this code is in newer versions too).<br>Could someone confirm this? Thank you.<br><br><br>fs/ocfs2/dlm/dlmmaster.c<br>

==================<br><br>function dlm_master_request_handler: (res-&gt;spinlock &lt;- dlm-&gt;master_lock)<br>-----------------------------------<br>spin_lock(&amp;res-&gt;spinlock); at line 1427<br>spin_lock(&amp;dlm-&gt;master_lock); at line 1475<br>

<br>function dlm_migrate_request_handler: (dlm-&gt;master_lock &lt;- res-&gt;spinlock)<br>-------------------------------------------------------<br>spin_lock(&amp;dlm-&gt;master_lock) at line 3036<br>spin_lock(&amp;res-&gt;spinlock); at line 3039<br>

<br><br><br>
caught by Stanse<br>(<a href="http://iti.fi.muni.cz/stanse/">http://iti.fi.muni.cz/stanse/</a>)<br>

--0016361e88909bedd9046907f549--


--===============1585850941476463681==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________
Ocfs2-devel mailing list
Ocfs2-devel@oss.oracle.com
http://oss.oracle.com/mailman/listinfo/ocfs2-devel
--===============1585850941476463681==--