[PATCH 0/2] Add hypercall interface for cpu online/offline

[PATCH 0/2] Add hypercall interface for cpu online/offline

[Shan, Haitao]

Hi, Keir,

These two little patches will add a hypercall interface for cpu online/offline.
Currently, I add it to Xen platform ops hypercall. I am not sure whether it is the proper place to hold this. So, any comments or preference from you? Thanks.

Best Regards
Haitao Shan

Re: [PATCH 0/2] Add hypercall interface for cpu online/offline

[Keir Fraser]

Should be a sysctl. platform_ops are for things we want controlled by,
typically, dom0 kernel. This will be controlled from tools.

 -- Keir

On 22/9/08 09:45, "Shan, Haitao" <haitao.shan@intel.com> wrote:

> Hi, Keir,
> 
> These two little patches will add a hypercall interface for cpu
> online/offline.
> Currently, I add it to Xen platform ops hypercall. I am not sure whether it is
> the proper place to hold this. So, any comments or preference from you?
> Thanks.
> 
> Best Regards
> Haitao Shan

Re: Re: [PATCH 0/2] Add hypercall interface for cpu online/offline

[Christoph Egger]

Please rename offline to poweroff and use offline for
de-coupling the physical CPU from the Xen scheduler only.
This is useful for machine check handling.

Christoph


On Monday 22 September 2008 10:48:17 Keir Fraser wrote:
> Should be a sysctl. platform_ops are for things we want controlled by,
> typically, dom0 kernel. This will be controlled from tools.
>
>  -- Keir
>
> On 22/9/08 09:45, "Shan, Haitao" <haitao.shan@intel.com> wrote:
> > Hi, Keir,
> >
> > These two little patches will add a hypercall interface for cpu
> > online/offline.
> > Currently, I add it to Xen platform ops hypercall. I am not sure whether
> > it is the proper place to hold this. So, any comments or preference from
> > you? Thanks.



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Re: Re: [PATCH 0/2] Add hypercall interface for cpu online/offline

[Keir Fraser]

online/offline is the usual terminology for CPU hotplug. If we need a
separate operation to merely stop scheduling on that pCPU (which isn't
immediately apparent to me) then we'll come up with a name for it.

 -- Keir

On 22/9/08 10:34, "Christoph Egger" <Christoph.Egger@amd.com> wrote:

> 
> Please rename offline to poweroff and use offline for
> de-coupling the physical CPU from the Xen scheduler only.
> This is useful for machine check handling.
> 
> Christoph
> 
> 
> On Monday 22 September 2008 10:48:17 Keir Fraser wrote:
>> Should be a sysctl. platform_ops are for things we want controlled by,
>> typically, dom0 kernel. This will be controlled from tools.
>> 
>>  -- Keir
>> 
>> On 22/9/08 09:45, "Shan, Haitao" <haitao.shan@intel.com> wrote:
>>> Hi, Keir,
>>> 
>>> These two little patches will add a hypercall interface for cpu
>>> online/offline.
>>> Currently, I add it to Xen platform ops hypercall. I am not sure whether
>>> it is the proper place to hold this. So, any comments or preference from
>>> you? Thanks.
> 
>