linux-ext4 - Re: [Bug 14830] When other IO is running sync times go to 10 to 20 minutes

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Date:	Wed, 27 Jan 2010 14:06:25 +0100
From:	Andre Noll <maan@...temlinux.org>
To:	Michael Godfrey <godfrey@....stanford.edu>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [Bug 14830] When other IO is running sync times go to 10 to 20 minutes

On 11:19, bugzilla-daemon@...zilla.kernel.org wrote:
> After kill -9 of the sync run it took about 20 minutes before 
> it died.

I was seeing similar behaviour on one of our servers, and changing
the io scheduler to noop fixed things for me. So it seems to be an
issue with cfq which is somehow triggered by ext4 but not by ext3.

To change the IO scheduler, just execute

	echo noop > /sys/block/sda/queue/scheduler

(replace sda if necessary).

Just my 2 cents
Andre
-- 
The only person who always got his work done by Friday was Robinson Crusoe

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