linux-kernel - [PATCH 3.2 48/67] ocfs2/dlm: clear refmap bit of recovery lock while doing local recovery cleanup

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Message-ID: <lsq.1456263723.963883966@decadent.org.uk>
Date:	Tue, 23 Feb 2016 21:42:03 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Junxiao Bi" <junxiao.bi@...cle.com>,
	"xuejiufei" <xuejiufei@...wei.com>,
	"Joel Becker" <jlbec@...lplan.org>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Mark Fasheh" <mfasheh@...e.de>, "Joseph Qi" <joseph.qi@...wei.com>
Subject: [PATCH 3.2 48/67] ocfs2/dlm: clear refmap bit of recovery lock
 while doing local recovery cleanup

3.2.78-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: xuejiufei <xuejiufei@...wei.com>

commit c95a51807b730e4681e2ecbdfd669ca52601959e upstream.

When recovery master down, dlm_do_local_recovery_cleanup() only remove
the $RECOVERY lock owned by dead node, but do not clear the refmap bit.
Which will make umount thread falling in dead loop migrating $RECOVERY
to the dead node.

Signed-off-by: xuejiufei <xuejiufei@...wei.com>
Reviewed-by: Joseph Qi <joseph.qi@...wei.com>
Cc: Mark Fasheh <mfasheh@...e.de>
Cc: Joel Becker <jlbec@...lplan.org>
Cc: Junxiao Bi <junxiao.bi@...cle.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 fs/ocfs2/dlm/dlmrecovery.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -2333,6 +2333,8 @@ static void dlm_do_local_recovery_cleanu
 						break;
 					}
 				}
+				dlm_lockres_clear_refmap_bit(dlm, res,
+						dead_node);
 				spin_unlock(&res->spinlock);
 				continue;
 			}