From: Rik van Riel <riel@nl.linux.org>
To: Karl Vogel <kvo@mail.seagha.com>
Cc: linux-mm@kvack.org
Subject: Re: Swapping out old pages
Date: Wed, 19 May 1999 20:46:51 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.03.9905192043200.275-100000@mirkwood.nl.linux.org> (raw)
In-Reply-To: <001501bea117$c0a2d850$2b01c80a@pc-kvo.antwerp.seagha.com>
On Tue, 18 May 1999, Karl Vogel wrote:
> - why does the swap out algorithm select the task with the largest
> RSS to free pages. If I'm not mistaken, the age of a page isn't
> considered?! Why is that? Am I overlooking something?
You're overlooking the fact that p->swap_cnt is only
recalculated when all processes have been scanned.
A new sweep starts at the process with the largest
swap_cnt -- but all processes are scanned eventually.
> - wouldn't it be beneficial if there is a parameter that allows
> you to specify that after a certain age, a page is swapped out to
> make room for the buffer cache.
The system already does that, and has been doing so
rather agressively since 2.1.89...
cheers,
Rik -- Open Source: you deserve to be in control of your data.
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prev parent reply other threads:[~1999-05-19 19:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-05-18 10:18 Karl Vogel
1999-05-19 18:46 ` Rik van Riel [this message]
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