linux-kernel - Re: regression: 100% io-wait with 2.6.24-rcX

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Date:	Wed, 9 Jan 2008 20:57:07 +0800
From:	Fengguang Wu <wfg@...l.ustc.edu.cn>
To:	jplatte@...sa.net
Cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org
Subject: Re: regression: 100% io-wait with 2.6.24-rcX

On Wed, Jan 09, 2008 at 01:22:33PM +0100, Joerg Platte wrote:
> Am Mittwoch, 9. Januar 2008 schrieb Fengguang Wu:
> 
> Thank your for the hint with the filesystems!
> 
> > Thank you for the clue. However I cannot reproduce the bug on
> > ext2/2.6.24-rc7. Can you provide more details? Thank you.
> 
> I attached some more information. I'm using the ata_piix driver for my PATA 
> disk and cdrom drive and booted with hpet=force. Kernel 2.6.23.X has been 
                                                          ~~~~~~~~
							  not 2.6.24-rc7?

> patched with the -hrt patches to enable the hidden hpet time on the ICH4-M 
> chipset. I just rebooted the notebook and mounted /tmp again as ext2 and now 
> the iowait problem is back. Seems to be reproducible on my computer. What 
> additional information do you need?

I mounted an ext2 as tmp and find no problem. My config options are:

CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
# CONFIG_EXT2_FS_XIP is not set

Fengguang

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