From: Martin Knoblauch <knobi@knobisoft.de>
To: linux-kernel@vger.kernel.org
Subject: Re: RAID-0 read perf. decrease after 2.4.20
Date: Tue, 16 Dec 2003 04:51:03 -0800 (PST) [thread overview]
Message-ID: <20031216125103.6301.qmail@web13903.mail.yahoo.com> (raw)
On Monday 08 December 2003 13:47, Marcelo Tosatti wrote:
Hi Marcelo,
> 2.4.20-aa included rmap and some VM modifications most notably
> "drop_behind()" logic which I believe should be the reason for the
huge
> read speedups. Can you please try it? Against 2.4.23.
Just some feedback:
echo 511 > /proc/sys/vm/max-readahead
brings back the read performance of my 30 disks on 4 controller
LVM/RAID0.
Cheers
Martin
=====
------------------------------------------------------
Martin Knoblauch
email: k n o b i AT knobisoft DOT de
www: http://www.knobisoft.de
next reply other threads:[~2003-12-16 12:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-16 12:51 Martin Knoblauch [this message]
2003-12-18 13:41 ` RAID-0 read perf. decrease after 2.4.20 Marcelo Tosatti
2003-12-18 14:37 ` Martin Knoblauch
2004-07-04 23:28 ` Mikael Johansson
2003-12-18 19:13 ` Mike Fedyk
2003-12-18 19:17 ` Marcelo Tosatti
-- strict thread matches above, loose matches on Subject: below --
2003-11-25 9:41 Martin Knoblauch
2003-11-24 10:05 Martin Knoblauch
2003-11-25 5:01 ` Joshua Schmidlkofer
2003-11-20 16:45 Mikael Johansson
2003-11-21 13:47 ` Marcelo Tosatti
2003-11-21 19:56 ` Mikael Johansson
2003-12-08 12:47 ` Marcelo Tosatti
2003-12-08 13:11 ` Marc-Christian Petersen
2003-12-08 13:21 ` Marcelo Tosatti
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=20031216125103.6301.qmail@web13903.mail.yahoo.com \
--to=knobi@knobisoft.de \
--cc=linux-kernel@vger.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).