From: Jens Axboe <axboe@suse.de>
To: Tejun Heo <htejun@gmail.com>
Cc: akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH linux-2.6.12-rc6-mm1] blk: elevator unplug thresh hanlding fix
Date: Thu, 16 Jun 2005 08:56:59 +0200 [thread overview]
Message-ID: <20050616065654.GA1483@suse.de> (raw)
In-Reply-To: <20050616034705.GA29048@htj.dyndns.org>
On Thu, Jun 16 2005, Tejun Heo wrote:
> Hello, Jens.
> Hello, Andrew.
>
> This patch fixes q->unplug_thresh condition check in
> __elv_add_request(). rq.count[READ] + rq.count[WRITE] can increase
> more than one if another thread has allocated a request after the
> current request is allocated or in_flight could have changed resulting
> in larger-than-one change of nrq, thus breaking the threshold
> mechanism.
Looks good, thanks!
--
Jens Axboe
prev parent reply other threads:[~2005-06-16 6:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-16 3:47 [PATCH linux-2.6.12-rc6-mm1] blk: elevator unplug thresh hanlding fix Tejun Heo
2005-06-16 6:56 ` Jens Axboe [this message]
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