linux-kernel - Re: [PATCH] cfq: fix IOPRIO_CLASS

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Message-ID: <20071105075732.GA5359@kernel.dk>
Date:	Mon, 5 Nov 2007 08:57:33 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Oleg Nesterov <oleg@...sign.ru>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, Nick <gentuu@...il.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cfq: fix IOPRIO_CLASS_IDLE accounting

On Sun, Nov 04 2007, Oleg Nesterov wrote:
> (untested, needs an ack from maintainer)
> 
> Spotted by Nick <gentuu@...il.com>, hopefully can explain the second trace in
> http://bugzilla.kernel.org/show_bug.cgi?id=9180.
> 
> If ->async_idle_cfqq != NULL cfq_put_async_queues() puts it IOPRIO_BE_NR times
> in a loop. Fix this.

That's obviously buggy, thanks Oleg! Fix is indeed correct. I'll add it.

-- 
Jens Axboe

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