Re: [Xen-devel] [PATCH] x86/xsave: initialization improvements

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 29.08.13 at 13:25, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:
> On 29/08/13 11:49, Jan Beulich wrote:
>> But eventually we will want/need to be able to hot-remove
>> CPU 0, and then some other CPU may later come back up
>> getting set its ID to zero. That shouldn't trigger one-time init
>> code paths.
>>
>> I know this is not the only place, but as I come across them and
>> touch respective code anyway, I'm trying to fix those instances.
> 
> Are we expecting that to actually work on real hardware?
> 
> One example is the BSP NMI routing which will only go to the CPU which
> the BIOS booted as the BSP.

If you look at recent Linux, they at least give the impression that
they are able to do this.

Jan


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