Re: [BUG] Raid1/5 over iSCSI trouble

[Bill Davidsen <davidsen@tmr.com>]

BERTRAND Joël wrote:
>
>     Sorry for this last mail. I have found another mistake, but I 
> don't know if this bug comes from iscsi-target or raid5 itself. iSCSI 
> target is disconnected because istd1 and md_d0_raid5 kernel threads 
> use 100% of CPU each !
>
> Tasks: 235 total,   6 running, 227 sleeping,   0 stopped,   2 zombie
> Cpu(s):  0.1%us, 12.5%sy,  0.0%ni, 87.4%id,  0.0%wa,  0.0%hi,  0.0%si, 
> 0.0%st
> Mem:   4139032k total,   218424k used,  3920608k free,    10136k buffers
> Swap:  7815536k total,        0k used,  7815536k free,    64808k cached
>
>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>  5824 root      15  -5     0    0    0 R  100  0.0  10:34.25 istd1
>  5599 root      15  -5     0    0    0 R  100  0.0   7:25.43 md_d0_raid5

Given that the summary shows 87.4% idle, something is not right. You 
might try another tool, like vmstat, to at least verify the way the CPU 
is being used. When you can't trust what your tools tell you it gets 
really hard to make decisions based on the data.

-- 
bill davidsen <davidsen@tmr.com>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979


-
To unsubscribe from this list: send the line "unsubscribe sparclinux" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html