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

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Date:	Fri, 11 Jan 2008 12:43:39 +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 Thu, Jan 10, 2008 at 11:03:05AM +0100, Joerg Platte wrote:
> Am Donnerstag, 10. Januar 2008 schrieb Fengguang Wu:
> > > problem, because the iowait problem disappeared today after the regular
> > > Debian update. I'll try to install the old package versions to make it
> > > show up again. Maybe that helps to debug it.
> >
> > Thank you. I'm running sid, ext2 as rootfs now ;-)
> 
> The error is back and I'm getting thousands of messages like this with the 
> patched kernel:
> 
> mm/page-writeback.c 668 wb_kupdate: pdflush(146) 21115 global 3936 0 0 wc _M > tw 1024 sk 0
> requeue_io 301: inode 81441 size 0 at 08:07(sda7)
> mm/page-writeback.c 668 wb_kupdate: pdflush(147) 17451 global 3936 0 0 wc _M > tw 1024 sk 2
> requeue_io 301: inode 81441 size 0 at 08:07(sda7)
> mm/page-writeback.c 668 wb_kupdate: pdflush(147) 17451 global 3936 0 0 wc _M > tw 1024 sk 2
> requeue_io 301: inode 81441 size 0 at 08:07(sda7)

Joerg, what's the output of `dumpe2fs /dev/sda7` and `lsof|grep /tmp`?

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