linux-kernel - Re: [patch] cfq-iosched: fix incorrect filing of rt async cfqq

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Message-ID: <54BFE3DC.4050101@kernel.dk>
Date:	Wed, 21 Jan 2015 10:37:32 -0700
From:	Jens Axboe <axboe@...nel.dk>
To:	Jeff Moyer <jmoyer@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [patch] cfq-iosched: fix incorrect filing of rt async cfqq

On 01/12/2015 01:21 PM, Jeff Moyer wrote:
> Hi,
> 
> If you can manage to submit an async write as the first async I/O from
> the context of a process with realtime scheduling priority, then a
> cfq_queue is allocated, but filed into the wrong async_cfqq bucket.  It
> ends up in the best effort array, but actually has realtime I/O
> scheduling priority set in cfqq->ioprio.

Applied, thanks Jeff. I've added a stable tag to it as well.

-- 
Jens Axboe

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