From: "Stephen C. Tweedie" <sct@redhat.com>
To: Rik van Riel <H.H.vanRiel@phys.uu.nl>
Cc: Andrea Arcangeli <arcangeli@mbox.queen.it>,
Linux MM <linux-mm@kvack.org>
Subject: Re: cp file /dev/zero <-> cache [was Re: increasing page size]
Date: Mon, 6 Jul 1998 11:38:10 +0100 [thread overview]
Message-ID: <199807061038.LAA00803@dax.dcs.ed.ac.uk> (raw)
In-Reply-To: <Pine.LNX.3.96.980705212422.2416D-100000@mirkwood.dummy.home>
Hi Rik,
On Sun, 5 Jul 1998 21:31:56 +0200 (CEST), Rik van Riel
<H.H.vanRiel@phys.uu.nl> said:
> A few months ago someone (who?) posted a patch that modified
> kswapd's internals to only unmap clean pages when told to.
> If I can find the patch, I'll integrate it and let kswapd
> only swap clean pages when:
> - page_cache_size * 100 > num_physpages * page_cache.borrow_percent
> or
> - (buffer_mem >> PAGE_SHIFT) * 100 > num_physpages * buffermem.borrow_percent
I'm not sure what that is supposed to achieve, and I'm not sure how well
we expect such tinkering to work uniformly on 8MB and 512MB machines.
Unmapping is not an issue with respect to cache sizes.
--Stephen
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next prev parent reply other threads:[~1998-07-06 11:07 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.3.96.980705072829.17879D-100000@mirkwood.dummy.home>
1998-07-05 11:32 ` Andrea Arcangeli
1998-07-05 17:00 ` Rik van Riel
1998-07-05 18:38 ` Andrea Arcangeli
1998-07-05 19:31 ` Rik van Riel
1998-07-06 10:38 ` Stephen C. Tweedie [this message]
1998-07-06 11:42 ` Rik van Riel
1998-07-06 14:20 ` Andrea Arcangeli
1998-07-06 10:31 ` Stephen C. Tweedie
1998-07-06 12:34 ` Andrea Arcangeli
1998-07-06 14:36 ` Stephen C. Tweedie
1998-07-06 19:28 ` Andrea Arcangeli
1998-07-07 12:01 ` Stephen C. Tweedie
1998-07-07 15:54 ` Rik van Riel
1998-07-07 17:32 ` Benjamin C.R. LaHaise
1998-07-08 13:54 ` Stephen C. Tweedie
1998-07-08 21:19 ` Andrea Arcangeli
1998-07-11 11:18 ` Rik van Riel
1998-07-11 21:11 ` Stephen C. Tweedie
1998-07-08 13:45 ` Stephen C. Tweedie
1998-07-08 18:57 ` Rik van Riel
1998-07-08 22:11 ` Stephen C. Tweedie
1998-07-09 7:43 ` Rik van Riel
1998-07-09 20:39 ` Rik van Riel
1998-07-13 11:54 ` Stephen C. Tweedie
1998-07-05 18:57 ` MOLNAR Ingo
1998-07-06 10:24 ` Stephen C. Tweedie
1998-07-06 13:37 ` Eric W. Biederman
1998-07-07 12:35 ` Stephen C. Tweedie
1998-07-09 13:01 Zachary Amsden
[not found] <199807091442.PAA01020@dax.dcs.ed.ac.uk>
1998-07-09 18:59 ` Rik van Riel
1998-07-09 23:37 ` Stephen C. Tweedie
1998-07-10 5:57 ` Rik van Riel
1998-07-11 14:14 ` Rik van Riel
1998-07-11 21:23 ` Stephen C. Tweedie
1998-07-11 22:25 ` Rik van Riel
1998-07-13 13:23 ` Stephen C. Tweedie
1998-07-12 1:47 ` Benjamin C.R. LaHaise
1998-07-13 13:42 ` Stephen C. Tweedie
1998-07-18 22:10 ` Rik van Riel
1998-07-20 16:04 ` Stephen C. Tweedie
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