Re: [patch]blk-mq: blk_mq_tag_to_rq should handle flush request

Jens Axboe
2014-06-04T15:11:51Z

On 2014-06-04 09:10, Christoph Hellwig wrote:
> On Wed, Jun 04, 2014 at 09:08:12AM -0600, Jens Axboe wrote:
>>> The performance regression is caused by "blk-mq: avoid code
>>> duplication", but I don't really understand why yet.
>>
>> Gah, looks like this one dropped the tag idling. I bet that is why.
>
> Ah, thanks. It's indeed exactly the same sort of slow down I bisected
> back then, this should have rung a bell instead of keeping me occupied
> for hours..

Patch is committed :-)

--
Jens Axboe