linux-kernel - Re: [Alsa-user] new source of MIDI playback slow-down identified - 5a03b051ed87e72b959f32a86054e1142ac4cf55 thp: use compaction in kswapd for GFP

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Date:	Wed, 23 Feb 2011 18:40:30 +0100
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Arthur Marsh <arthur.marsh@...ernode.on.net>,
	Clemens Ladisch <cladisch@...glemail.com>,
	alsa-user@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [Alsa-user] new source of MIDI playback slow-down identified -
 5a03b051ed87e72b959f32a86054e1142ac4cf55 thp: use compaction in kswapd for
 GFP_ATOMIC order > 0

On Wed, Feb 23, 2011 at 05:01:17PM +0000, Mel Gorman wrote:
> I regret that yet more patches are being blasted around but I hope the included
> figures will convince you to run yet-another-test. I don't know how you are
> measuring how long IRQs are being disabled and when it's a problem but it's
> what I'm more interested in right now than the kswapd CPU usage which I'm
> still in the process of gathering data to analyse.

Arthur, I suggest to apply this patch before any of my patches (just
like the kswapd-high-wmark) before testing my patches. It's orthogonal
so it can be applied at the same time.

Acked-by: Andrea Arcangeli <aarcange@...hat.com>

Thanks,
Andrea
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