Hi all,
I recently had a hang on our cluster that I unwittingly caused and
wondered if anyone else has seen anything similar. We were noticing a
definitely slow-down in one filesystem and doing some investigation, I
noticed that one of the nodes had a large number of locks gfs2_glock in
/proc/slabinfo was very large. I decided to try doing a gfs2_tool
shrink on the filesystem that was going to slow. I noticed some
reduction in the number of locks, but not a lot, so I did it again.
Everything dropped into D wait on that filesystem, as did several of the
kernel threads. Has anyone else seen this behavior? Is this a known bug?
-- scooter
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