Re: [BUG] Raid1/5 over iSCSI trouble

["BERTRAND Joël" <joel.bertrand@systella.fr>]

Dan Williams wrote:
> On 10/27/07, BERTRAND Joël <joel.bertrand@systella.fr> wrote:
>> Dan Williams wrote:
>>> Can you collect some oprofile data, as Ming suggested, so we can maybe
>>> see what md_d0_raid5 and istd1 are fighting about?  Hopefully it is as
>>> painless to run on sparc as it is on IA:
>>>
>>> opcontrol --start --vmlinux=/path/to/vmlinux
>>> <wait>
>>> opcontrol --stop
>>> opreport --image-path=/lib/modules/`uname -r` -l
>>         Done.
>>
> 
> [..]
> 
>>         Is it enough ?
> 
> I would expect md_d0_raid5 and istd1 to show up pretty high in the
> list if they are constantly pegged at a 100% CPU utilization like you
> showed in the failure case.  Maybe this was captured after the target
> has disconnected?

	No, I have launched opcontrol before starting raid1 creation, and 
stopped after disconnection. Don't forget that this server has 32 CPU's.

	Regards,

	JKB

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