linux-kernel - Re: [PATCH] free swap space of (re)activated pages

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Date:	Fri, 2 Mar 2007 17:18:18 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>
Subject: Re: [PATCH] free swap space of (re)activated pages

On Fri, 02 Mar 2007 15:31:19 -0500
Rik van Riel <riel@...hat.com> wrote:

> the attached patch frees the swap space of already resident pages
> when swap space starts getting tight, instead of only freeing up
> the swap space taken up by newly swapped in pages.
> 
> This should result in the swap space of pages that remain resident
> in memory being freed, allowing kswapd more chances to actually swap
> a page out (instead of rotating it back onto the active list).

Fair enough.   How do we work out if this helps things?
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