linux-kernel - Re: [PATCH] blk-mq: auto-start hw queue in requeue

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Message-ID: <20140919175452.GA20333@lst.de>
Date:	Fri, 19 Sep 2014 19:54:52 +0200
From:	Christoph Hellwig <hch@....de>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	Ming Lei <ming.lei@...onical.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] blk-mq: auto-start hw queue in requeue

On Fri, Sep 19, 2014 at 11:52:59AM -0600, Jens Axboe wrote:
> I agree. I think Ming wanted to avoid an unnecessary bitflip if
> possible, but the fix is more convoluted than I would like.

If the requeue from irq context ever ends up in the fast path we
have much worse problems..

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