linux-kernel - Re: [patch]blk-mq: blk_mq_tag_to

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Date:	Wed, 04 Jun 2014 08:54:23 -0600
From:	Jens Axboe <axboe@...nel.dk>
To:	Christoph Hellwig <hch@...radead.org>
CC:	Shaohua Li <shli@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [patch]blk-mq: blk_mq_tag_to_rq should handle flush request

On 2014-06-04 08:20, Christoph Hellwig wrote:
> On Wed, Jun 04, 2014 at 08:15:45AM -0600, Jens Axboe wrote:
>> Alright, I'll revert it to pass in the tags instead.
>
> It's not as simple as the added code wants to get a queue from the
> hwctx, which we can't get at.  I was planning to look into this, but
> there are various other regressions in the recent block updates that I
> need to fix before I can even test a tree with this one reverted.

Which regressions? Performance or crashes?

> If you can get to sorting this out soon I'd love you to handle it,
> otherwise I'll look into it as soon as I can.

Just took a look at it, but I don't see the problematic path. I'm 
looking at wip-9.

-- 
Jens Axboe

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