From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick Coleman <pcoleman@iinet.net.au>
Subject: CPU usage problem with custom 2.6.7 kernel
Date: Sat, 14 Aug 2004 18:24:07 +0800
Message-ID: <411DE847.3070809@iinet.net.au>
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Return-path: <reiserfs-list-return-20284-reiserfs=m.gmane.org@namesys.com>
list-help: <mailto:reiserfs-list-help@namesys.com>
list-unsubscribe: <mailto:reiserfs-list-unsubscribe@namesys.com>
list-post: <mailto:reiserfs-list@namesys.com>
Errors-To: flx@namesys.com
List-Id: <reiserfs-devel.vger.kernel.org>
Content-Type: text/plain; charset="us-ascii"; format="flowed"
To: reiserfs-list@namesys.com

Hi,
I am using reiser3 on linux-2.6.7 on both a desktop and a fileserver. Intensive reading and writing
seem to be using 100% cpu on both, limiting the rate at which I can transfer stuff to/from the
fileserver to about 1Mb/s (on a 100MB/s network/800mhz Celeron server). The default slackware-2.4
kernel does not seem to have this problem (the slackware 2.6.7 kernel does not have reiserfs support
by default). Anyone have any ideas?

Thanks in advance,
Patrick

hdparm output (desktop) - 80gb (seagate), hda3 is 65gb reiser3:
pcoleman@hal:~$ sudo hdparm /dev/hda

/dev/hda:
   multcount    =  0 (off)
   IO_support   =  1 (32-bit)
   unmaskirq    =  1 (on)
   using_dma    =  1 (on)
   keepsettings =  0 (off)
   readonly     =  0 (off)
   readahead    = 256 (on)
   geometry     = 65535/16/63, sectors = 156301488, start = 0
pcoleman@hal:~$

hdparm output (server) - 120gb (western digital), one partition, hdb1 is 120gb reiser3:
admin@server:~$ sudo hdparm /dev/hda

/dev/hda:
   multcount    = 16 (on)
   IO_support   =  0 (default 16-bit)
   unmaskirq    =  0 (off)
   using_dma    =  0 (off)
   keepsettings =  0 (off)
   readonly     =  0 (off)
   readahead    = 256 (on)
   geometry     = 16383/255/63, sectors = 234441648, start = 0
admin@server:~$

I can supply kernel config files if required (the mailing list rejects messages over 40kb)