Ocfs2 devel - May 2013 - ocfs2: Question for ocfs2_recovery_thread

Hi,
Once there is node down in the cluster, ocfs2_recovery_thread will be
triggered on each node. These threads then do the down node recovery by
get super lock.
I have several questions on this:
1) Why each node has to run such a thread? We know at last one node can
get the super lock and do the actual recovery.
2) If this thread is running but something error occurred, take
ocfs2_super_lock failed for example, the thread will exit without
clearing recovery map, will it cause other threads still waiting for
recovery in ocfs2_wait_for_recovery?

The first node that gets the lock will do the actual recovery. The others will
get the lock and see a clean journal and skip the recovery. A thread should
never error out if it fails to get the lock. It should try and try again.

On May 17, 2013, at 11:27 PM, Joseph Qi <joseph.qi at huawei.com> wrote:
> Hi,
> Once there is node down in the cluster, ocfs2_recovery_thread will be
> triggered on each node. These threads then do the down node recovery by
> get super lock.
> I have several questions on this:
> 1) Why each node has to run such a thread? We know at last one node can
> get the super lock and do the actual recovery.
> 2) If this thread is running but something error occurred, take
> ocfs2_super_lock failed for example, the thread will exit without
> clearing recovery map, will it cause other threads still waiting for
> recovery in ocfs2_wait_for_recovery?
>