linux-kernel - Re: [PATCH] Give kjournald a IOPRIO_CLASS

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Message-ID: <20081003102117.7db22b09@infradead.org>
Date:	Fri, 3 Oct 2008 10:21:17 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jens Axboe <jens.axboe@...cle.com>, linux-kernel@...r.kernel.org,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] Give kjournald a IOPRIO_CLASS_RT io priority

On Thu, 2 Oct 2008 22:24:38 -0700
Andrew Morton <akpm@...ux-foundation.org> wrote:

> 
> Mount a junk partition with `-oakpm' and run some benchmarks.  If the
> results are "wow" then it's worth spending time on.  If the results
> are "meh" then we can not bother..
> 

I've been running with this for a few hours now
while I can't see IO is perfectly smooth now, it does feel a lot better
and latencytop isn't showing me the huge spikes in latency either in
the mail client.
(there's a lot of little stuff, but not the 4+ seconds)
-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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