[Linux-cluster] Corosync goes cpu to 95-99% (same problems with RHEL6.2)

[carlopmart]

On 11/04/2011 07:05 PM, Nicolas Ross wrote:
>>> get a support signoff. Also the corosync updates have not finished
>>> through our validation process. Only hot fixes (from support) are
>>> available
>>>
>>> Regards
>>> -steve
>>>
>>
>> Sorry to re-open this thread ... But exists any news about this problem??
>
> In fact, there is !
>
> It appears that this situation is within the microcode of some specific
> xeon "nahalem" (sorry for the spelling) processors... It has to do with
> switching cstate and the way rhel6.1 now switch state that was not done
> in 6.0.
>
> You can look at bugzilla # 710265 and kb docs # 61105.
>
> Our temporary fix for the moment was to disable cstate transition by
> adding :
>
> intel_idle.max_cstate=0 processor.max_cstate=1
>
> to the kernel line in grub.conf, update and reboot. We hadn't had any
> cpu spikes on any of the 5 nodes we've updated yet. The 3 remaining
> still haven't been updated due to production downtime.
>
> Get a support signoff for this, I'm in no way endorsing this solution,
> as I can't know if you're in the same situation as mine.
>
> Have fun !

Ok, I have upgraded one rhel6.2 host (in a cluster with two nodes) and 
problems persists ... Versions:

corosync-1.4.1-4.el6.i686
corosynclib-1.4.1-4.el6.i686
cman-3.0.12.1-23.el6.i686
rgmanager-3.0.12.1-5.el6.i686

  Will be any solution at sometime??




-- 
CL Martinez
carlopmart {at} gmail {d0t} com