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From: William Lee Irwin III <wli@holomorphy.com>
To: Rik van Riel <riel@redhat.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
	linux-mm <linux-mm@kvack.org>,
	Christoph Lameter <clameter@sgi.com>
Subject: Re: [PATCH] free swap space when (re)activating page
Date: Tue, 20 Feb 2007 11:00:05 -0800	[thread overview]
Message-ID: <20070220190005.GQ21484@holomorphy.com> (raw)
In-Reply-To: <45D63445.5070005@redhat.com>

On Fri, Feb 16, 2007 at 05:46:29PM -0500, Rik van Riel wrote:
> The attached patch does what I described in the other thread, it
> makes the pageout code free swap space when swap is getting full,
> by taking away the swap space from pages that get moved onto or
> back onto the active list.
> In some tests on a system with 2GB RAM and 1GB swap, it kept the
> free swap at 500MB for a 2.3GB qsbench, while without the patch
> over 950MB of swap was in use all of the time.
> This should give kswapd more flexibility in what to swap out.
> What do you think?
> Signed-off-by: Rik van Riel <riel@redhat.com>

I would call this a bugfix, not an optimization.


-- wli

  parent reply	other threads:[~2007-02-20 19:00 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-16 22:46 Rik van Riel
2007-02-20  4:53 ` Christoph Lameter
2007-02-20 13:28   ` Rik van Riel
2007-02-20 16:37     ` Christoph Lameter
2007-02-20 16:46       ` Rik van Riel
2007-02-20 18:20         ` Christoph Lameter
2007-02-20 19:31           ` Rik van Riel
2007-02-20 19:42             ` Christoph Lameter
2007-02-20 19:54             ` Rik van Riel
2007-02-20 20:26               ` Christoph Lameter
2007-02-20 20:57               ` Christoph Lameter
2007-02-20 19:00 ` William Lee Irwin III [this message]
2007-02-21 15:09 Al Boldi
     [not found] <7Pk3X-bD-17@gated-at.bofh.it>
     [not found] ` <7QvgM-3aK-3@gated-at.bofh.it>
     [not found]   ` <7QDeB-7KY-11@gated-at.bofh.it>
     [not found]     ` <7QGc7-3ZB-13@gated-at.bofh.it>
     [not found]       ` <7QGlP-4e1-11@gated-at.bofh.it>
     [not found]         ` <7QHUO-6RS-5@gated-at.bofh.it>
     [not found]           ` <7QJ9Y-mo-1@gated-at.bofh.it>
     [not found]             ` <7QJk7-zW-51@gated-at.bofh.it>
2007-02-23  1:44               ` Bodo Eggert
2007-02-23  3:34                 ` Rik van Riel

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