[Ocfs2-users] OCFS2 Threads using 100% CPU, filesystem operations were frozen
Michael S. Moody
michael at gsc.cc
Fri Jun 6 14:17:59 PDT 2008
I had an instance today on several servers where the load average soared,
and all of my apache processes were in uninterruptible sleep state.
I did run scanlocks, and the ps command as requested:
On one server some apache processes looked like this:
3345 D apache2 dlm_wait_for_recovery
On another, the output was completely different.
Nonetheless, the following threads on one server were using 100% cpu:
[o2net]
[o2hb-BC778ACE98]
[dlm_thread]
That box needed to be rebooted, and things recovered.
The output of scanlocks:
forum3 ~ # ./scanlocks
/dev/sdb1 M000000000000000000002b7976e45d
/dev/sdb1 O000000000000000242b4bb00000000
/dev/sdb1 O0000000000000000dd506300000000
/dev/sdb1 O0000000000000000f898b400000000
/dev/sdb1 O0000000000000001b23aa000000000
/dev/sdb1 O000000000000000133e0c200000000
/dev/sdb1 O00000000000000011c6ea100000000
/dev/sdb1 N00000000013fffb30140013c
/dev/sdb1 N000000000039292b016d640d
/dev/sdb1 O0000000000000000f8999e00000000
/dev/sdb1 N000000000042fb6002ff2763
/dev/sdb1 O0000000000000002d5d64300000000
/dev/sdb1 O0000000000000001e639b100000000
/dev/sdb1 O0000000000000000398aa700000000
/dev/sdb1 O0000000000000000c139fd00000000
/dev/sdb1 O00000000000000014df4ab00000000
/dev/sdb1 D0000000000000000815e6ed5b0763f
forum ~ # ./scanlocks
/dev/sdd1 O0000000000000000dd506300000000
/dev/sdd1 M0000000000000000c102c700000000
/dev/sdd1 M000000000000000039d65600000000
/dev/sdd1 S000000000000000000000200000000
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