linux-kernel - Re: [PATCH] mm: use pagevec to rotate reclaimable page

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Date:	Tue, 18 Sep 2007 10:44:35 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	Hisashi Hifumi <hifumi.hisashi@....ntt.co.jp>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] mm: use pagevec to rotate reclaimable page

On Tue, 18 Sep 2007 11:29:50 +1000 Nick Piggin <nickpiggin@...oo.com.au> wrote:

> It would be interesting to test -mm kernels. They have a patch which reduces
> zone lock contention quite a lot.

They do?  Which patch?

> I think your patch is a nice idea, and with less zone lock contention in other
> areas, it is possible that it might produce a relatively larger improvement.

I'm a bit wobbly about this patch - it adds additional single-cpu overhead
to reduce multiple-cpu overhead and latency.
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