linux-kernel - Re: [PATCH 4/5] dm: implement REQ_FLUSH/FUA support for request-based dm

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Date:	Tue, 31 Aug 2010 15:14:42 +0200
From:	Tejun Heo <tj@...nel.org>
To:	Mike Snitzer <snitzer@...hat.com>
CC:	jaxboe@...ionio.com, k-ueda@...jp.nec.com, j-nomura@...jp.nec.com,
	jamie@...reable.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-raid@...r.kernel.org,
	hch@....de, dm-devel@...hat.com
Subject: Re: [PATCH 4/5] dm: implement REQ_FLUSH/FUA support for request-based
 dm

Hello,

On 08/31/2010 03:02 PM, Mike Snitzer wrote:
> On Tue, Aug 31 2010 at  6:29am -0400,
> Tejun Heo <tj@...nel.org> wrote:
> 
>> On 08/30/2010 11:28 PM, Mike Snitzer wrote:
>>> Hmm, but unfortunately I was too quick to say the patch fixed the hang.
>>>
>>> It is much more rare, but I can still get a hang.  I just got the
>>> following running vgcreate against an DM mpath (rq-based) device:
>>
>> Can you please try this one instead?
> 
> Still hit the hang on the 5th iteration of my test:
> while true ; do ./test_dm_discard_mpath.sh && sleep 1 ; done
> 
> Would you like me to (re)send my test script offlist?

Yes, please.  Thanks.

-- 
tejun
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