From: Al Boldi <a1426z@gawab.com>
To: linux-kernel@vger.kernel.org
Subject: Re: [RFC] Limit the size of the pagecache
Date: Thu, 25 Jan 2007 09:42:47 +0300 [thread overview]
Message-ID: <200701250942.47321.a1426z@gawab.com> (raw)
Rik van Riel wrote:
> Christoph Lameter wrote:
> > This is a patch using some of Aubrey's work plugging it in what is IMHO
> > the right way. Feel free to improve on it. I have gotten repeatedly
> > requests to be able to limit the pagecache.
>
> IMHO it's a bad hack.
>
> It would be better to identify the problem this "feature" is
> trying to fix, and then fix the root cause.
Ok, here is the problem: kswapd.
Limiting the page-cache memory inhibits invoking kswapd needlessly, aiding
performance and easing OOM pressures.
I tried the patch; it works.
But it needs a bit of debugging. Setting pagecache_ratio = 1 either
deadlocks or reduces thru-put to < 1mb/s.
Thanks!
--
Al
next reply other threads:[~2007-01-25 6:40 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-25 6:42 Al Boldi [this message]
2007-01-25 8:24 ` [RFC] Limit the size of the pagecache Vaidyanathan Srinivasan
2007-01-25 10:29 ` Peter Zijlstra
2007-01-25 11:23 ` Vaidyanathan Srinivasan
2007-01-25 11:57 ` Al Boldi
2007-01-25 11:57 ` Al Boldi
2007-01-25 18:37 ` Vaidyanathan Srinivasan
[not found] <7GEEK-4lH-39@gated-at.bofh.it>
[not found] ` <7GLdb-5Uz-13@gated-at.bofh.it>
[not found] ` <7GRix-7fU-1@gated-at.bofh.it>
[not found] ` <7GRLZ-7Uy-29@gated-at.bofh.it>
2007-01-25 14:51 ` Bodo Eggert
2007-01-25 14:51 ` Bodo Eggert
-- strict thread matches above, loose matches on Subject: below --
2007-01-24 0:49 Christoph Lameter
2007-01-24 0:49 ` Christoph Lameter
2007-01-24 2:53 ` KAMEZAWA Hiroyuki
2007-01-24 2:53 ` KAMEZAWA Hiroyuki
2007-01-24 3:01 ` Christoph Lameter
2007-01-24 3:01 ` Christoph Lameter
2007-01-24 5:47 ` Aubrey Li
2007-01-24 5:47 ` Aubrey Li
2007-01-24 3:00 ` Nick Piggin
2007-01-24 3:00 ` Nick Piggin
2007-01-24 3:14 ` Christoph Lameter
2007-01-24 3:14 ` Christoph Lameter
2007-01-24 3:51 ` Aubrey Li
2007-01-24 3:51 ` Aubrey Li
2007-01-24 4:03 ` Nick Piggin
2007-01-24 4:03 ` Nick Piggin
2007-01-26 10:27 ` Andrew Morton
2007-01-26 10:27 ` Andrew Morton
2007-01-24 3:13 ` KAMEZAWA Hiroyuki
2007-01-24 3:13 ` KAMEZAWA Hiroyuki
2007-01-24 4:30 ` Christoph Lameter
2007-01-24 4:30 ` Christoph Lameter
2007-01-24 5:15 ` KAMEZAWA Hiroyuki
2007-01-24 5:15 ` KAMEZAWA Hiroyuki
2007-01-25 0:32 ` KAMEZAWA Hiroyuki
2007-01-25 0:32 ` KAMEZAWA Hiroyuki
2007-01-25 2:41 ` Christoph Lameter
2007-01-25 2:41 ` Christoph Lameter
2007-01-25 3:12 ` KAMEZAWA Hiroyuki
2007-01-25 3:12 ` KAMEZAWA Hiroyuki
2007-01-25 4:28 ` Rik van Riel
2007-01-25 4:28 ` Rik van Riel
2007-01-25 5:19 ` KAMEZAWA Hiroyuki
2007-01-25 5:19 ` KAMEZAWA Hiroyuki
2007-01-25 5:40 ` Rik van Riel
2007-01-25 5:40 ` Rik van Riel
2007-01-25 6:00 ` KAMEZAWA Hiroyuki
2007-01-25 6:00 ` KAMEZAWA Hiroyuki
2007-01-26 10:29 ` Andrew Morton
2007-01-26 10:29 ` Andrew Morton
2007-01-26 18:01 ` KAMEZAWA Hiroyuki
2007-01-26 18:01 ` KAMEZAWA Hiroyuki
2007-01-24 7:04 ` Vaidyanathan Srinivasan
2007-01-24 7:04 ` Vaidyanathan Srinivasan
2007-01-24 7:55 ` Peter Zijlstra
2007-01-24 7:55 ` Peter Zijlstra
2007-01-24 12:50 ` Nick Piggin
2007-01-24 12:50 ` Nick Piggin
2007-01-24 12:58 ` Peter Zijlstra
2007-01-24 12:58 ` Peter Zijlstra
2007-01-24 14:58 ` Christoph Lameter
2007-01-24 14:58 ` Christoph Lameter
2007-01-24 20:06 ` Erik Andersen
2007-01-24 20:06 ` Erik Andersen
2007-01-25 2:40 ` Christoph Lameter
2007-01-25 2:40 ` Christoph Lameter
2007-01-25 8:07 ` Vaidyanathan Srinivasan
2007-01-25 8:07 ` Vaidyanathan Srinivasan
2007-01-24 14:22 ` Aubrey Li
2007-01-24 14:22 ` Aubrey Li
2007-01-24 14:56 ` Peter Zijlstra
2007-01-24 14:56 ` Peter Zijlstra
2007-01-25 2:27 ` Aubrey Li
2007-01-25 2:27 ` Aubrey Li
2007-01-24 12:33 ` Vaidyanathan Srinivasan
2007-01-24 12:33 ` Vaidyanathan Srinivasan
2007-01-24 14:56 ` Christoph Lameter
2007-01-24 14:56 ` Christoph Lameter
2007-01-25 4:17 ` Vaidyanathan Srinivasan
2007-01-25 4:17 ` Vaidyanathan Srinivasan
2007-01-25 4:45 ` Rik van Riel
2007-01-25 4:45 ` Rik van Riel
2007-01-25 5:49 ` Vaidyanathan Srinivasan
2007-01-25 5:49 ` Vaidyanathan Srinivasan
2007-01-25 16:07 ` Rik van Riel
2007-01-25 16:07 ` Rik van Riel
2007-01-25 17:57 ` Balbir Singh
2007-01-25 17:57 ` Balbir Singh
2007-01-25 6:35 ` Aubrey Li
2007-01-25 6:35 ` Aubrey Li
2007-01-25 6:47 ` Christoph Lameter
2007-01-25 6:47 ` Christoph Lameter
2007-01-25 7:49 ` Vaidyanathan Srinivasan
2007-01-25 7:49 ` Vaidyanathan Srinivasan
2007-01-25 4:18 ` Rik van Riel
2007-01-25 4:18 ` Rik van Riel
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