Re: Question about vcpu_avail

[Michal Novotny <minovotn@redhat.com>]

On 11/24/2009 04:05 PM, Keir Fraser wrote:
> On 24/11/2009 14:51, "Michal Novotny"<minovotn@redhat.com>  wrote:
>
>    
>>> We already have a config option for that, called 'vcpus'. 'vcpu_avail' can
>>> then be used to limit the number of those which are brought online during
>>> initial boot. Any new config-file options can be sugar on top of those.
>>>
>>>        
>> Well, imagine scenario you need to allocate 4 vcpus to the guest but you
>> need to use only 2 vcpus at startup. So you suggest having `vcpus` and
>> `maxvcpus` options in the config file and allocating all the `maxvcpus`
>> and setting number of `vcpus` by setting appropriate mask using
>> `vcpu_avail` ?
>>      
> Yeah, I think you get it. In your example: if the user specifies maxvcpus=4,
> vcpus=2 then xm turns that into vcpus=4, vcpu_avail=3 before sending it to
> xend.
>
>   -- Keir
>
>    
Right, so, you mean that I should implement it into `xm` command itself 
and not XenD ? Well, what about people using eg. libvirt with upstream 
Xen? This way it should not be working since XM is not used... right?

Thanks,
-- Michal
>
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