Re: Disk schedulers

[Lukas Hejtmanek <xhejtman@ics.muni.cz>]

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