From: "Aubrey Li" <aubreylee@gmail.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
svaidy@linux.vnet.ibm.com, nickpiggin@yahoo.com.au,
rgetz@blackfin.uclinux.org, Michael.Hennerich@analog.com,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Bryan Wu <cooloney.lkml@gmail.com>
Subject: Re: [RFC] Limit the size of the pagecache
Date: Wed, 24 Jan 2007 13:47:44 +0800 [thread overview]
Message-ID: <6d6a94c50701232147g7453fe79q6ce0df94da2ac749@mail.gmail.com> (raw)
In-Reply-To: <20070124115310.48cda374.kamezawa.hiroyu@jp.fujitsu.com>
Christoph's patch is better than mine. The only thing I think is that
zone->max_pagecache_pages should be checked never less than
zone->pages_low.
The good part of the patch is using the existing reclaimer. But the
problem in my opinion of the idea is the existing reclaimer too. Think
of when vfs cache limit is
hit, reclaimer doesn't reclaim all of the reclaimable pages, it just
give few out. So next time vfs pagecache request, it is quite possible
reclaimer is triggered again. That means after limit is hit, reclaim
will be implemented every time fs ops allocating memory. That's the
point in my mind impacting the performance of the applications.
-Aubrey
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next prev parent reply other threads:[~2007-01-24 5:47 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-24 0:49 [RFC] Limit the size of the pagecache Christoph Lameter
2007-01-24 2:53 ` KAMEZAWA Hiroyuki
2007-01-24 3:01 ` Christoph Lameter
2007-01-24 5:47 ` Aubrey Li [this message]
2007-01-24 3:00 ` Nick Piggin
2007-01-24 3:14 ` Christoph Lameter
2007-01-24 3:51 ` Aubrey Li
2007-01-24 4:03 ` Nick Piggin
2007-01-26 10:27 ` Andrew Morton
2007-01-24 3:13 ` KAMEZAWA Hiroyuki
2007-01-24 4:30 ` Christoph Lameter
2007-01-24 5:15 ` KAMEZAWA Hiroyuki
2007-01-25 0:32 ` KAMEZAWA Hiroyuki
2007-01-25 2:41 ` Christoph Lameter
2007-01-25 3:12 ` KAMEZAWA Hiroyuki
2007-01-25 4:28 ` Rik van Riel
2007-01-25 5:19 ` KAMEZAWA Hiroyuki
2007-01-25 5:40 ` Rik van Riel
2007-01-25 6:00 ` KAMEZAWA Hiroyuki
2007-01-26 10:29 ` Andrew Morton
2007-01-26 18:01 ` KAMEZAWA Hiroyuki
2007-01-24 7:04 ` Vaidyanathan Srinivasan
2007-01-24 7:55 ` Peter Zijlstra
2007-01-24 12:50 ` Nick Piggin
2007-01-24 12:58 ` Peter Zijlstra
2007-01-24 14:58 ` Christoph Lameter
2007-01-24 20:06 ` Erik Andersen
2007-01-25 2:40 ` Christoph Lameter
2007-01-25 8:07 ` Vaidyanathan Srinivasan
2007-01-24 14:22 ` Aubrey Li
2007-01-24 14:56 ` Peter Zijlstra
2007-01-25 2:27 ` Aubrey Li
2007-01-24 12:33 ` Vaidyanathan Srinivasan
2007-01-24 14:56 ` Christoph Lameter
2007-01-25 4:17 ` Vaidyanathan Srinivasan
2007-01-25 4:45 ` Rik van Riel
2007-01-25 5:49 ` Vaidyanathan Srinivasan
2007-01-25 16:07 ` Rik van Riel
2007-01-25 17:57 ` Balbir Singh
2007-01-25 6:35 ` Aubrey Li
2007-01-25 6:47 ` Christoph Lameter
2007-01-25 7:49 ` Vaidyanathan Srinivasan
2007-01-25 4:18 ` Rik van Riel
[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
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