[Ocfs2-users] OCFS2 Threads using 100% CPU, filesystem operations were frozen

[Sunil Mushran]

What version/kernel are you running?

We are about to release 1.2.9 that addresses one known case of o2net
consuming 100% cpu. Due out next week.

Michael S. Moody wrote:
>
> 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
>
>  
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Ocfs2-users mailing list
> Ocfs2-users at oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs2-users