[ClusterLabs] Antw: [EXT] Re: Antw: Hanging OCFS2 Filesystem any one else?

Gang He GHe at suse.com
Sun Jul 11 04:55:30 EDT 2021

Hi Ulrich,

Thank for your update.
Based on some feedback from the upstream, there is a patch (ocfs2: initialize ip_next_orphan), which should fix this problem.
I can comfirm the patch looks very similar with your problem.
I will verify it next week, then let you know the result.


From: Users <users-bounces at clusterlabs.org> on behalf of Ulrich Windl <Ulrich.Windl at rz.uni-regensburg.de>
Sent: Friday, July 9, 2021 15:56
To: users at clusterlabs.org
Subject: [ClusterLabs] Antw: [EXT] Re: Antw: Hanging OCFS2 Filesystem any one else?


An update on the issue:
SUSE support found out that the reason for the hanging processes is a deadlock caused by a race condition (Kernel 5.3.18-24.64-default). Support is working on a fix.
Today the cluster "fixed" the problem in an unusual way:

h19 kernel: Out of memory: Killed process 6838 (corosync) total-vm:261212kB, anon-rss:31444kB, file-rss:7700kB, shmem-rss:121872kB

I doubt that was the best possible choice ;-)

The dead corosync caused the DC (h18) to fence h19 (which was successful), but the DC was fenced while it tried to recover resources, so the complete cluster rebooted.


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