Re: [PATCH 01/22] x86: add methods for writing of an MSR on severalCPUs

[H. Peter Anvin]

Borislav Petkov wrote:
>>>
>> If nothing else it might matter for boot time.  Serializing *anything*
>> across a large number of CPUs can be very expensive.
> 
> well, upon a closer look, smp_call_function_many() skips over the CPU
> it is executing on and there's currently work in that area to extend
> that API: http://marc.info/?l=linux-kernel&m=123979231511594&w=2.
> 
> However, according to Linus' comments, it looks like this would need a
> bit of work so I guess we should wait with the concurrency stuff a bit,
> no?
> 

Well, we can introduce the API now if that's where we intend it to go.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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