linux-kernel - Re: kernel 2.6.23 CFS problem?

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Date:	Fri, 26 Oct 2007 18:04:26 +0800
From:	"Wang, Baojun" <wangbj@....edu.cn>
To:	Mike Galbraith <efault@....de>, linux-kernel@...r.kernel.org
Subject: Re: kernel 2.6.23 CFS problem?

On Friday 26 October 2007 17:05:42, you wrote：
> On Fri, 2007-10-26 at 15:32 +0800, Wang, Baojun wrote:
> > > Perhaps he has any tasks stuck in 'D' state?  If so, SysRq-t output for
> > > these would be a good thing to collect.  What leads him to suspect the
> > > process scheduler, etc.  More details are needed.
> >
> > The task is S+ state, please see in the attachment tarball, SysRq-t
> > output has also been attached, I wish it would help. I doubt it's the CFS
> > problem because it's first introduced into the 2.6.23 kernel.
>
> (yeah, but there were a truckload of other changes as well)
>
> Looking at your data, _my_ first suspect would be the 2.6.22->2.6.23
> futex changes.  I'd revert all of the changes to kernel/futex.c and
> kernel/futex_compat.c, and see if the problem went away.  If it didn't,
> I'd then do a full git bisect to nail it down.
>
> 	-Mike

Thanks very much, also my glibc (2.6.1) is built under 2.6.23 (but not 
linux-headers, which is 2.6.22). but I've tried right now (install ELDK4.1) 
on another x86_64 machine, without any problem (x86_64, Core2Duo E6600, 4G 
RAM)

Wang
-- 
Wang, Baojun                                        Lanzhou University
Distributed & Embedded System Lab              http://dslab.lzu.edu.cn
School of Information Science and Engeneering        wangbj@....edu.cn
Tianshui South Road 222. Lanzhou 730000                     .P.R.China
Tel:+86-931-8912025                                Fax:+86-931-8912022

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