Comment 6 for bug 1681410

I think we've also had a related issue.
We haven't had any serious corruption but we have had random locks that never get released which requires a server reboot to clear.

OCFS2 does support trim, as does our SAN. I think the issue may be related to running fstrim in parallel however.
I didn't realise fstrim was in cron.weekly on all 3 servers that had OCFS2 mounted, causing them to run it at basically the exact same time.

After disabling that when I finally noticed it running at one point I haven't had any further issues (mind you it's only been a few days).

Running fstrim by default is probably a bad idea on these more advanced filesystems since the liklihood of it running multiple times at once is there.
It's safer to assume that the sysadmin knows about their SAN's fstrim capability and can schedule it in a more controlled manner.