Re: Question about vcpu_avail

[Michal Novotny <minovotn@redhat.com>]

On 11/24/2009 03:24 PM, Keir Fraser wrote:
> On 24/11/2009 11:27, "Michal Novotny"<minovotn@redhat.com>  wrote:
>
>    
>>> i.e., no need for xend itself to know about the new config item.
>>>
>>>    -- Keir
>>>
>>>
>>>        
>> Well, I don't know Keir since the main use scenario for maxvcpus is to
>> set number of vcpus for the guest so a new definition in Xend should be
>> required.
>>      
> 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.
>
>   -- Keir
>
>
>    
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` ?

Thanks,
-- Michal