This is a note to let you know that I've just added the patch titled
ocfs2: fix cluster hang after a node dies
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: ocfs2-fix-cluster-hang-after-a-node-dies.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From 1c01967116a678fed8e2c68a6ab82abc8effeddc Mon Sep 17 00:00:00 2001
From: Changwei Ge ge.changwei@h3c.com Date: Wed, 15 Nov 2017 17:31:33 -0800 Subject: ocfs2: fix cluster hang after a node dies
From: Changwei Ge ge.changwei@h3c.com
commit 1c01967116a678fed8e2c68a6ab82abc8effeddc upstream.
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 Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/ocfs2/dlm/dlmrecovery.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/ocfs2/dlm/dlmrecovery.c +++ b/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 stable-queue which might be from ge.changwei@h3c.com are
queue-4.9/ocfs2-fix-cluster-hang-after-a-node-dies.patch queue-4.9/ocfs2-should-wait-dio-before-inode-lock-in-ocfs2_setattr.patch