Xen users - Jul 2011 - Debian misbehaving in centos dom0

Hi,

This is the specifications

dom0
--------
[root@server ]# uname -r
2.6.18-238.12.1.el5xen
[root@server ]# uname -m
x86_64

domu
--------

root@test:~# uname -r
2.6.18-238.12.1.el5xen
root@test:~# uname -m
x86_64

My issue is like dom0 clock is moving too fast. Interestingly, it is
affecting ubuntu & debian domU. centos domU is just working fine.


Here is how I could recreate the problem.

root@test:~# date
Mon Sep 26 00:40:56 UTC 2011
root@test:~# date
Mon Sep 26 02:27:35 UTC 2011
root@test:~# date
Mon Sep 26 05:03:47 UTC 2011
root@test:~# time

real    1m27.712s
user    0m0.020s
sys     0m0.000s

I tried to enable xen independent wall clock in domU. But, this
doesn''t seem to be solving issue.

I have verified that the same VM is working fine in another dom0 where
kernel is 2.6.18-194.26.1.el5xen.

Can anyone could give any insights into what might be wrong .


--
Thanks,
Sherin

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Le 05/07/2011 09:22, Sherin George a écrit :
> Hi,
>
> This is the specifications
>
> dom0
> --------
> [root@server ]# uname -r
> 2.6.18-238.12.1.el5xen
> [root@server ]# uname -m
> x86_64
>
> domu
> --------
>
> root@test:~# uname -r
> 2.6.18-238.12.1.el5xen
> root@test:~# uname -m
> x86_64
>
I think you''d better try to run your Debain PV guest with the debian 
kernel using pygrub for example.
> My issue is like dom0 clock is moving too fast. Interestingly, it is
> affecting ubuntu&  debian domU. centos domU is just working fine.
>
>
> Here is how I could recreate the problem.
>
> root@test:~# date
> Mon Sep 26 00:40:56 UTC 2011
> root@test:~# date
> Mon Sep 26 02:27:35 UTC 2011
> root@test:~# date
> Mon Sep 26 05:03:47 UTC 2011
> root@test:~# time
>
> real    1m27.712s
> user    0m0.020s
> sys     0m0.000s
>
> I tried to enable xen independent wall clock in domU. But, this
> doesn''t seem to be solving issue.
Try to set ''disable kernel'' in ntpd if running on the dom0,
and set back
independant_wall_clock to 0 (so no use for ntp in domU)
> I have verified that the same VM is working fine in another dom0 where
> kernel is 2.6.18-194.26.1.el5xen.
>
> Can anyone could give any insights into what might be wrong .
>
Here are some general trick concerning using Xen and Debian:
http://www.horoa.net/2011/07/xen-tweaks/?lang=eng
It''s maybe more related to using Debian as dom0, but some tricks apply 
also to domU
> --
> Thanks,
> Sherin
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
-- 
<http://www.horoa.net>


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