The patch titled
Subject: ocfs2: fix cluster hang after a node dies
has been added to the -mm tree. Its filename is
ocfs2-fix-cluster-hang-after-a-node-dies.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ocfs2-fix-cluster-hang-after-a-node-dies.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-fix-cluster-hang-after-a-node-dies.patch
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From: Changwei Ge <ge.changwei@xxxxxxx>
Subject: ocfs2: fix cluster hang after a node dies
When a node dies, other live nodes have to choose a new master for an
existed lock resource mastered by the dead node.
As for ocfs2/dlm implementation, this is done by function -
dlm_move_lockres_to_recovery_list which marks those lock rsources as
DLM_LOCK_RES_RECOVERING and manages them via a list from which DLM changes
lock resource's master later.
So without invoking dlm_move_lockres_to_recovery_list, no master will be
choosed after dlm recovery accomplishment since no lock resource can be
found through ::resource list.
What's worse is that if DLM_LOCK_RES_RECOVERING is not marked for lock
resources mastered a dead node, it will break up synchronization among
nodes.
So invoke dlm_move_lockres_to_recovery_list again.
Fixs: 'commit ee8f7fcbe638 ("ocfs2/dlm: continue to purge recovery lockres when recovery master goes down")'
Link: http://lkml.kernel.org/r/63ADC13FD55D6546B7DECE290D39E373CED6E0F9@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Changwei Ge <ge.changwei@xxxxxxx>
Reported-by: Vitaly Mayatskih <v.mayatskih@xxxxxxxxx>
Tested-by: Vitaly Mayatskikh <v.mayatskih@xxxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Cc: Joseph Qi <jiangqi903@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/dlm/dlmrecovery.c | 1 +
1 file changed, 1 insertion(+)
diff -puN fs/ocfs2/dlm/dlmrecovery.c~ocfs2-fix-cluster-hang-after-a-node-dies fs/ocfs2/dlm/dlmrecovery.c
--- a/fs/ocfs2/dlm/dlmrecovery.c~ocfs2-fix-cluster-hang-after-a-node-dies
+++ a/fs/ocfs2/dlm/dlmrecovery.c
@@ -2419,6 +2419,7 @@ static void dlm_do_local_recovery_cleanu
dlm_lockres_put(res);
continue;
}
+ dlm_move_lockres_to_recovery_list(dlm, res);
} else if (res->owner == dlm->node_num) {
dlm_free_dead_locks(dlm, res, dead_node);
__dlm_lockres_calc_usage(dlm, res);
_
Patches currently in -mm which might be from ge.changwei@xxxxxxx are
ocfs2-fix-cluster-hang-after-a-node-dies.patch
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