From: Changwei Ge ge.changwei@h3c.com 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@H3CMLB14-E... Signed-off-by: Changwei Ge ge.changwei@h3c.com Reported-by: Vitaly Mayatskih v.mayatskih@gmail.com Tested-by: Vitaly Mayatskikh v.mayatskih@gmail.com Cc: Mark Fasheh mfasheh@versity.com Cc: Joel Becker jlbec@evilplan.org Cc: Junxiao Bi junxiao.bi@oracle.com Cc: Joseph Qi jiangqi903@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

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); _