From: "H. Peter Anvin" <hpa@zytor.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Nicholas Miell <nmiell@comcast.net>,
Randy Dunlap <randy.dunlap@oracle.com>,
"J.H." <warthog9@kernel.org>, Willy Tarreau <w@1wt.eu>,
Pavel Machek <pavel@ucw.cz>,
kernel list <linux-kernel@vger.kernel.org>,
webmaster@kernel.org
Subject: Re: [KORG] Re: kernel.org lies about latest -mm kernel
Date: Sat, 06 Jan 2007 12:18:39 -0800 [thread overview]
Message-ID: <45A0041F.4060903@zytor.com> (raw)
In-Reply-To: <20070106121301.d07de0c9.akpm@osdl.org>
Andrew Morton wrote:
>>>
>>> The most fundamental problem seems to be that I can't tell currnt Linux
>>> kernels that the dcache/icache is precious, and that it's way too eager
>>> to dump dcache and icache in favour of data blocks. If I could do that,
>>> this problem would be much, much smaller.
>
> Usually people complain about the exact opposite of this.
Yeah, but we constantly have all-filesystem sweeps, and being able to
retain those in memory would be a key to performance, *especially* from
the upload latency standpoint.
>> Isn't setting the vm.vfs_cache_pressure sysctl below 100 supposed to do
>> this?
Just tweaked it (setting it to 1). There really should be another
sysctl to set the denominator instead of hardcoding it at 100, since the
granularity of this sysctl at the very low end is really much too coarse.
I missed this sysctl since the name isn't really all that obvious.
-hpa
next prev parent reply other threads:[~2007-01-06 20:19 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-14 22:37 kernel.org lies about latest -mm kernel Pavel Machek
2006-12-14 23:01 ` Randy Dunlap
2006-12-14 23:38 ` Sergio Monteiro Basto
2006-12-16 17:44 ` [KORG] " Randy Dunlap
2006-12-16 17:57 ` Andrew Morton
2006-12-16 18:02 ` Randy Dunlap
2006-12-16 19:30 ` J.H.
2006-12-16 20:30 ` Russell King
2006-12-26 16:47 ` H. Peter Anvin
2006-12-16 21:21 ` Nigel Cunningham
2006-12-26 16:49 ` H. Peter Anvin
2007-01-07 3:35 ` Nigel Cunningham
2007-01-07 4:10 ` Jeff Garzik
2007-01-07 4:47 ` Nigel Cunningham
2007-01-07 4:22 ` Jeff Garzik
2007-01-07 4:29 ` Linus Torvalds
2007-01-07 20:11 ` Greg KH
2007-01-07 21:30 ` H. Peter Anvin
2007-01-07 5:17 ` H. Peter Anvin
2007-01-07 5:24 ` How git affects kernel.org performance H. Peter Anvin
2007-01-07 5:39 ` Linus Torvalds
2007-01-07 8:55 ` Willy Tarreau
2007-01-07 8:58 ` H. Peter Anvin
2007-01-07 9:03 ` Willy Tarreau
2007-01-07 10:28 ` Christoph Hellwig
2007-01-07 10:52 ` Willy Tarreau
2007-01-07 18:17 ` Linus Torvalds
2007-01-07 19:13 ` Linus Torvalds
[not found] ` <9e4733910701071126r7931042eldfb73060792f4f41@mail.gmail.com>
2007-01-07 19:35 ` Linus Torvalds
2007-01-07 10:50 ` Jan Engelhardt
2007-01-07 18:49 ` Randy Dunlap
2007-01-07 19:07 ` Jan Engelhardt
2007-01-07 19:28 ` Randy Dunlap
2007-01-07 19:37 ` Linus Torvalds
2007-01-07 9:15 ` Andrew Morton
2007-01-07 9:38 ` Rene Herman
2007-01-08 3:05 ` Suparna Bhattacharya
2007-01-08 12:58 ` Theodore Tso
2007-01-08 13:41 ` Johannes Stezenbach
2007-01-08 13:56 ` Theodore Tso
2007-01-08 13:59 ` Pavel Machek
2007-01-08 14:17 ` Theodore Tso
2007-01-08 13:43 ` Jeff Garzik
2007-01-09 1:09 ` Paul Jackson
2007-01-09 2:18 ` Jeremy Higdon
[not found] ` <20070109075945.GA8799@mail.ustc.edu.cn>
2007-01-09 7:59 ` Fengguang Wu
2007-01-09 16:23 ` Linus Torvalds
[not found] ` <20070110015739.GA26978@mail.ustc.edu.cn>
2007-01-10 1:57 ` Fengguang Wu
2007-01-10 3:20 ` Nigel Cunningham
[not found] ` <20070110140730.GA986@mail.ustc.edu.cn>
2007-01-10 14:07 ` Fengguang Wu
2007-01-12 10:54 ` Nigel Cunningham
2007-01-07 14:57 ` Robert Fitzsimons
2007-01-07 19:12 ` J.H.
2007-01-08 1:51 ` Jakub Narebski
2007-01-07 15:06 ` Krzysztof Halasa
2007-01-07 20:31 ` Shawn O. Pearce
2007-01-08 14:46 ` Nicolas Pitre
2007-01-09 4:29 ` [KORG] Re: kernel.org lies about latest -mm kernel Nigel Cunningham
2007-01-09 5:09 ` Adrian Bunk
2007-01-09 5:51 ` Nigel Cunningham
2006-12-17 12:32 ` Pavel Machek
2006-12-17 13:13 ` Jeff Garzik
2006-12-17 18:23 ` Randy Dunlap
2006-12-17 22:37 ` Matti Aarnio
2006-12-18 0:42 ` J.H.
2006-12-19 6:46 ` Willy Tarreau
2006-12-19 7:39 ` J.H.
2006-12-19 13:32 ` Willy Tarreau
2006-12-19 14:36 ` Dave Jones
2006-12-19 14:38 ` Willy Tarreau
2006-12-26 16:14 ` H. Peter Anvin
2007-01-08 20:10 ` Jean Delvare
2006-12-19 6:34 ` Willy Tarreau
2006-12-19 6:52 ` J.H.
2007-01-06 18:33 ` Randy Dunlap
2007-01-06 19:18 ` H. Peter Anvin
2007-01-06 19:35 ` Willy Tarreau
2007-01-06 19:37 ` Nicholas Miell
2007-01-06 20:13 ` Andrew Morton
2007-01-06 20:18 ` H. Peter Anvin [this message]
2007-03-19 19:27 ` [PATCH] sysctl: vfs_cache_divisor Randy Dunlap
2007-03-19 20:36 ` Andrew Morton
2007-03-19 20:42 ` Randy Dunlap
2007-03-20 4:22 ` H. Peter Anvin
2007-03-21 23:01 ` Randy Dunlap
2007-03-21 23:11 ` Andrew Morton
2007-03-23 0:07 ` Kyle Moffett
2007-03-23 20:36 ` Randy Dunlap
2007-03-23 20:59 ` H. Peter Anvin
2007-03-24 0:45 ` Kyle Moffett
2007-03-24 1:17 ` Kyle Moffett
2007-03-20 19:53 ` Ingo Oeser
2007-01-06 23:50 ` [KORG] Re: kernel.org lies about latest -mm kernel H. Peter Anvin
2007-01-06 20:13 ` Jeff Garzik
2007-01-06 20:17 ` Andrew Morton
2007-01-06 20:20 ` H. Peter Anvin
2007-01-06 20:36 ` Andrew Morton
2007-01-06 19:21 ` J.H.
2007-01-07 19:52 ` Randy Dunlap
2007-01-07 23:56 ` H. Peter Anvin
2006-12-26 17:02 ` H. Peter Anvin
2007-01-08 19:31 ` Jean Delvare
2007-01-08 19:37 ` Willy Tarreau
2007-01-08 22:05 ` Jean Delvare
2006-12-19 15:37 ` Tim Schmielau
2007-01-08 21:20 ` Jean Delvare
2007-01-08 21:33 ` J.H.
2007-01-09 7:01 ` Jean Delvare
2007-01-09 7:25 ` J.H.
2007-01-09 13:36 ` Jean Delvare
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=45A0041F.4060903@zytor.com \
--to=hpa@zytor.com \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=nmiell@comcast.net \
--cc=pavel@ucw.cz \
--cc=randy.dunlap@oracle.com \
--cc=w@1wt.eu \
--cc=warthog9@kernel.org \
--cc=webmaster@kernel.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).