linux-kernel - Re: Block: Fix blk_start_queueing() so as not to process a stopped queue

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Message-ID: <20081001074843.GA19428@kernel.dk>
Date:	Wed, 1 Oct 2008 09:48:43 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Elias Oltmanns <eo@...ensachen.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Block: Fix blk_start_queueing() so as not to process a stopped queue

On Wed, Oct 01 2008, Elias Oltmanns wrote:
> Especially since blk_start_queueing() is used as the unplug_fn() callback
> by the cfq scheduler, we'd better make it behave like a proper unplug
> function. That is to say, return immediately if the queue is stopped.
> 
> Cc: stable <stable@...nel.org>
> Signed-off-by: Elias Oltmanns <eo@...ensachen.de>
> ---
> This is not a recent regression, so it might not be accepted as an rc
> fix. However, it most definitely is a bug and should go into a stable
> release. Applies to 2.6.27-rc8.

I don't think this is by far serious enough for -stable. Please let me
know what bad behaviour you observed due to this bug?

-- 
Jens Axboe

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