Xen devel - Dec 2011 - dom0 crash on csched_acct

Hi,

I''m having some random crashes with XenServer 5.6 SP2 (Xen 3.4.2).
I thought that it was a problem with Xen 3.4 and tried XenServer 6.0
(Xen 4.1.1), but no luck.
I know that this list is about XenSource and (maybe) doesn''t cover it,
but i''m trying to understand
what is happening.

All i have is this crash.log: http://cpro3845.publiccloud.com.br/crash.log

Kdump segfaults on XenServer, so no core to help.

I took a look on sched_credit.c +978 and this is what triggering the crash:

        BUG_ON( (sdom->weight * sdom->active_vcpu_count) > weight_left
);

We have some VM''s that have different vCPU priority values. Could be
this that is triggering the problem?
Also, there is a limit for vcpu_count on a host?

I''m still trying to reproduce the crash, but it''s totally
random.
Does anyone have an idea or where to start?

If more details are needed, let me know.

Thanks.

On Thu, 2011-12-29 at 11:15 +0000, guilherme m. schroeder
wrote:
> Hi,
> 
> I''m having some random crashes with XenServer 5.6 SP2 (Xen 3.4.2).
> I thought that it was a problem with Xen 3.4 and tried XenServer 6.0
> (Xen 4.1.1), but no luck.
> I know that this list is about XenSource and (maybe) doesn''t cover
it,
> but i''m trying to understand
> what is happening.
Your best bet for XenServer support is either to contact your Citrix
support representative or to use the XenServer forums.

Ian.