Re: [BUG] Raid5 trouble

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

Dan Williams wrote:
> On Fri, 2007-10-19 at 01:04 -0700, BERTRAND Joël wrote:
>>         I never see any oops with this patch. But I cannot create a
>> RAID1 array
>> with a local RAID5 volume and a foreign RAID5 array exported by iSCSI.
>> iSCSI seems to works fine, but RAID1 creation randomly aborts due to a
>> unknown SCSI task on target side.
> 
> For now I am going to forward this patch to Neil for inclusion in
> -stable and 2.6.24-rc.  I will add a "Tested-by: Joël Bertrand
> <joel.bertrand@systella.fr>" unless you have an objection.

	No objection.

>>         I run for 12 hours some dd's (read and write in nullio)
>> between initiator and target without any disconnection. Thus iSCSI code seems
>> to be robust. Both initiator and target are alone on a single gigabit
>> ethernet link (without any switch). I'm investigating...
> 
> Can you reproduce on 2.6.22?

	I cannot downgrade these servers on 2.6.22 due to a bug in FUTEX code.

> Also, I do not think this is the cause of your failure, but you have
> CONFIG_DMA_ENGINE=y in your config.  Setting this to 'n' will compile
> out the unneeded checks for offload engines in async_memcpy and
> async_xor.

	I will try...

	Regards,

	JKB
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