linux-kernel - Re: [PATCH] make elv_register() output atomic

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Message-ID: <20070308134200.GI9671@kernel.dk>
Date:	Thu, 8 Mar 2007 14:42:00 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Thibaut VARENE <T-Bone@...isc-linux.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] make elv_register() output atomic

On Thu, Mar 08 2007, Thibaut VARENE wrote:
> Hi,
> 
> Booting 2.6.21-rc3-g45592145 I noticed the following on one of my
> machines in the bootlog:
> 
> io scheduler noop registered<6>Time: jiffies clocksource has been installed.
> 
> io scheduler deadline registered (default)
> 
> 
> Looking at block/elevator.c, it appears that elv_register() uses two
> consecutive printks in a non-atomic way, leading to the above glitch. The
> attached trivial patch fixes this issue, by using a single printk.

Thanks, looks like a good fix!

-- 
Jens Axboe

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