Re: [PATCH v7 8/8] x86/tlb: just do tlb flush on one of siblingsof SMT

[H. Peter Anvin]

On 05/24/2012 01:32 AM, Alex Shi wrote:
> 
> Sure. but just want to know how many commercial x86 CPU uses >2 SMTs?
> Write a short, quick function to do random selection in SMT is quite
> complicate considering cpumask maybe just contain random number SMT
> siblings in a core.
> 

Wrong question.  This is a forward compatibility issue.  You have to
take into account potential future CPUs as well.

And no, it isn't hard.

	-hpa

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