From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Christoph Lameter <clameter@sgi.com>,
Aubrey Li <aubreylee@gmail.com>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
Robin Getz <rgetz@blackfin.uclinux.org>,
"Henn, erich, Michael" <Michael.Hennerich@analog.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC] Limit the size of the pagecache
Date: Wed, 24 Jan 2007 23:50:36 +1100 [thread overview]
Message-ID: <45B7561C.9000102@yahoo.com.au> (raw)
In-Reply-To: <1169625333.4493.16.camel@taijtu>
Peter Zijlstra wrote:
> On Tue, 2007-01-23 at 16:49 -0800, Christoph Lameter wrote:
>>2. Insure rapid turnaround of pages in the cache.
[...]
> The only maybe valid point would be 2, and I'd like to see if we can't
> solve that differently - a better use-once logic comes to mind.
There must be something I'm missing with that point. The faster
the turnaround of pagecache pages, the *less* efficiently the
pagecache is working (assuming a rapid turnaround means a high
rate of pages brought into, then reclaimed from pagecache).
I can't argue that a smaller pagecache will be subject to a
higher turnaround given the same workload, but I don't know why
that would be a good thing.
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
WARNING: multiple messages have this Message-ID (diff)
From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Christoph Lameter <clameter@sgi.com>,
Aubrey Li <aubreylee@gmail.com>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
Robin Getz <rgetz@blackfin.uclinux.org>,
"Henn, erich, Michael" <Michael.Hennerich@analog.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC] Limit the size of the pagecache
Date: Wed, 24 Jan 2007 23:50:36 +1100 [thread overview]
Message-ID: <45B7561C.9000102@yahoo.com.au> (raw)
In-Reply-To: <1169625333.4493.16.camel@taijtu>
Peter Zijlstra wrote:
> On Tue, 2007-01-23 at 16:49 -0800, Christoph Lameter wrote:
>>2. Insure rapid turnaround of pages in the cache.
[...]
> The only maybe valid point would be 2, and I'd like to see if we can't
> solve that differently - a better use-once logic comes to mind.
There must be something I'm missing with that point. The faster
the turnaround of pagecache pages, the *less* efficiently the
pagecache is working (assuming a rapid turnaround means a high
rate of pages brought into, then reclaimed from pagecache).
I can't argue that a smaller pagecache will be subject to a
higher turnaround given the same workload, but I don't know why
that would be a good thing.
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
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next prev parent reply other threads:[~2007-01-24 12:51 UTC|newest]
Thread overview: 95+ 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 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 [this message]
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
-- strict thread matches above, loose matches on Subject: below --
2007-01-25 6:42 Al Boldi
2007-01-25 8:24 ` 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
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