[Xen-devel] Re: Shall we clear the cpumap in XEN_DOMCTL_setvcpuaffinity

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

It's in the staging tree
http://xenbits.xensource.com/staging/xen-unstable.hg

 -- Keir

On 12/05/2010 08:57, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:

> Thanks, although "no changes found" after hg pull :-)
> 
> --jyh
> 
>> -----Original Message-----
>> From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx]
>> Sent: Wednesday, May 12, 2010 3:43 PM
>> To: Jiang, Yunhong
>> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
>> Subject: Re: Shall we clear the cpumap in XEN_DOMCTL_setvcpuaffinity
>> 
>> On 12/05/2010 08:22, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:
>> 
>>> When browse code, I noticed if the op->u.vcpuaffinity.cpumap is NULL, a
>>> random
>>> value of new_affinity will be passed to vcpu_set_affinity(), as in followed
>>> code.
>>> 
>>> I'm not sure if this is expected result. IMO, we should return -EINVAL if no
>>> cpu specified, as the return value at vcpu_set_affinity() for empty cpumap.
>> 
>> Xen-unstable:21350.
>> 
>> Thanks,
>> Keir
>> 
>>> Did I missed anything?
>>> 
>>>     case XEN_DOMCTL_getvcpuaffinity:
>>>     {
>>>         domid_t dom = op->domain;
>>>         struct domain *d = rcu_lock_domain_by_id(dom);
>>>         struct vcpu *v;
>>>         cpumask_t new_affinity;
>>> ......
>>>         if ( op->cmd == XEN_DOMCTL_setvcpuaffinity )
>>>         {
>>>             xenctl_cpumap_to_cpumask(  >>>>> the new_affinity is not
>>> initialized for if cpumap==NULL
>>>                 &new_affinity, &op->u.vcpuaffinity.cpumap);
>>>             ret = vcpu_set_affinity(v, &new_affinity);
>>>         }
>>> 
>>> Thanks
>>> --jyh
>> 
> 



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