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Message-ID: <20080220184842.GA4867@ics.muni.cz>
Date: Wed, 20 Feb 2008 19:48:42 +0100
From: Lukas Hejtmanek <xhejtman@....muni.cz>
To: Pavel Machek <pavel@....cz>
Cc: linux-kernel@...r.kernel.org, zdenek.kabelac@...il.com
Subject: Re: Disk schedulers
On Sat, Feb 16, 2008 at 05:20:49PM +0000, Pavel Machek wrote:
> Is cat /dev/zero > file enough to reproduce this?
yes.
> ext3 filesystem?
yes.
> Will cat /etc/passwd work while machine is unresponsive?
yes.
while find does not work:
time find /
/
/etc
/etc/manpath.config
/etc/update-manager
/etc/update-manager/release-upgrades
/etc/gshadow-
/etc/inputrc
/etc/openalrc
/etc/bonobo-activation
/etc/bonobo-activation/bonobo-activation-config.xml
/etc/gnome-vfs-2.0
/etc/gnome-vfs-2.0/modules
/etc/gnome-vfs-2.0/modules/obex-module.conf
/etc/gnome-vfs-2.0/modules/extra-modules.conf
/etc/gnome-vfs-2.0/modules/theme-method.conf
/etc/gnome-vfs-2.0/modules/font-method.conf
/etc/gnome-vfs-2.0/modules/default-modules.conf
^C
real 0m7.982s
user 0m0.003s
sys 0m0.000s
i.e., it took 8 seconds to list just 17 dir entries.
It looks like I have this problem:
http://www.linuxinsight.com/first_benchmarks_of_the_ext4_file_system.html#comment-619
(the last comment with title: Sustained writes 2 or more times the amount of
memfree....)
--
Lukáš Hejtmánek
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