From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Nick Piggin <nickpiggin@yahoo.com.au>
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 13:58:08 +0100 [thread overview]
Message-ID: <1169643488.6189.18.camel@twins> (raw)
In-Reply-To: <45B7561C.9000102@yahoo.com.au>
On Wed, 2007-01-24 at 23:50 +1100, Nick Piggin wrote:
> 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.
I interpreted the issue as selecting the wrong pages for the 'working
set'. Like not quickly evicting pages from a large streaming read, which
then pushes out more useful pages.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Nick Piggin <nickpiggin@yahoo.com.au>
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 13:58:08 +0100 [thread overview]
Message-ID: <1169643488.6189.18.camel@twins> (raw)
In-Reply-To: <45B7561C.9000102@yahoo.com.au>
On Wed, 2007-01-24 at 23:50 +1100, Nick Piggin wrote:
> 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.
I interpreted the issue as selecting the wrong pages for the 'working
set'. Like not quickly evicting pages from a large streaming read, which
then pushes out more useful pages.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2007-01-24 12:58 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
2007-01-24 12:50 ` Nick Piggin
2007-01-24 12:58 ` Peter Zijlstra [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1169643488.6189.18.camel@twins \
--to=a.p.zijlstra@chello.nl \
--cc=Michael.Hennerich@analog.com \
--cc=aubreylee@gmail.com \
--cc=clameter@sgi.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=nickpiggin@yahoo.com.au \
--cc=rgetz@blackfin.uclinux.org \
--cc=svaidy@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.