kernel 2.6.23 CFS problem?

kernel 2.6.23 CFS problem?

[Wang, Baojun]

[-- Attachment #1.1: Type: text/plain, Size: 938 bytes --]

hi, list

  I've upgraded my kernel from 2.6.22.9 to 2.6.23 when it was out, After that 
I can't install ELDK 4.1 anymore (The one I installed was crashed), it always 
stopped at preparing install package XXX (or YYY sometimes), I've waited for 
a very long time(more than 1 hour), but it still the same. After I switch 
back to kernel 2.6.22.9, everything is fine. Is there somebody have the some 
problem like me?

  I've tried on two machines:

1. AMD DURON 1.6G, 512M RAM, gentoo 2007.0
2. INTEL Pentium 3 667M, 192M RAM, gentoo 2007.0

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

[-- Attachment #1.2: config-2.6.23-k7.gz --]
[-- Type: application/x-gzip, Size: 20840 bytes --]

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

Re: kernel 2.6.23 CFS problem?

[WANG Cong]

On Fri, Oct 26, 2007 at 10:57:45AM +0800, Wang, Baojun wrote:
>hi, list
>
>  I've upgraded my kernel from 2.6.22.9 to 2.6.23 when it was out, After that 
>I can't install ELDK 4.1 anymore (The one I installed was crashed), it always 
>stopped at preparing install package XXX (or YYY sometimes), I've waited for 
>a very long time(more than 1 hour), but it still the same. After I switch 
>back to kernel 2.6.22.9, everything is fine. Is there somebody have the some 
>problem like me?
>

What's your XXX or YYY?

What error messages did you get?

Why don't you try to update your glibc or something like that?

I am afraid it's off-topic here.

Regards.

-- 
May the Source Be With You.

Re: kernel 2.6.23 CFS problem?

[Mike Galbraith]

On Fri, 2007-10-26 at 12:45 +0800, WANG Cong wrote:
> On Fri, Oct 26, 2007 at 10:57:45AM +0800, Wang, Baojun wrote:
> >hi, list
> >
> >  I've upgraded my kernel from 2.6.22.9 to 2.6.23 when it was out, After that 
> >I can't install ELDK 4.1 anymore (The one I installed was crashed), it always 
> >stopped at preparing install package XXX (or YYY sometimes), I've waited for 
> >a very long time(more than 1 hour), but it still the same. After I switch 
> >back to kernel 2.6.22.9, everything is fine. Is there somebody have the some 
> >problem like me?
> >
> 
> What's your XXX or YYY?
> 
> What error messages did you get?
> 
> Why don't you try to update your glibc or something like that?
> 
> I am afraid it's off-topic here.

Not necessarily so if kernel version indeed makes the difference between
hung install and successful completion.

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.

(I went looking for this package, but there are several, and they're
huge)

	-Mike

Re: kernel 2.6.23 CFS problem?

[Wang, Baojun]

[-- Attachment #1.1: Type: text/plain, Size: 2052 bytes --]

On Friday 26 October 2007 14:47:02, you wrote：
> On Fri, 2007-10-26 at 12:45 +0800, WANG Cong wrote:
> > On Fri, Oct 26, 2007 at 10:57:45AM +0800, Wang, Baojun wrote:
> > >hi, list
> > >
> > >  I've upgraded my kernel from 2.6.22.9 to 2.6.23 when it was out, After
> > > that I can't install ELDK 4.1 anymore (The one I installed was
> > > crashed), it always stopped at preparing install package XXX (or YYY
> > > sometimes), I've waited for a very long time(more than 1 hour), but it
> > > still the same. After I switch back to kernel 2.6.22.9, everything is
> > > fine. Is there somebody have the some problem like me?
> >
> > What's your XXX or YYY?
In the attachment
> > What error messages did you get?
No error message, but the installation just "freeze", I've waited for more 
than 1 hour, but still no progress, with 2.6.22.9 it was fine.
> > Why don't you try to update your glibc or something like that?
glibc is 2.6.1
> > I am afraid it's off-topic here.
>
> Not necessarily so if kernel version indeed makes the difference between
> hung install and successful completion.
>
> 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.
> (I went looking for this package, but there are several, and they're
> huge)
>
> 	-Mike

Wang

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

[-- Attachment #1.2: report.tar.bz2 --]
[-- Type: application/x-tbz, Size: 8797 bytes --]

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

Re: kernel 2.6.23 CFS problem?

[Mike Galbraith]

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

Re: kernel 2.6.23 CFS problem?

[Wang, Baojun]

[-- Attachment #1: Type: text/plain, Size: 1562 bytes --]

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@lzu.edu.cn
Tianshui South Road 222. Lanzhou 730000                     .P.R.China
Tel:+86-931-8912025                                Fax:+86-931-8912022

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 189 bytes --]