Re: [RFC PATCH v1 3/5] KVM: Add paravirt kvm_flush_tlb_others

[Peter Zijlstra]

On Tue, 2012-05-01 at 12:57 +0200, Peter Zijlstra wrote:
> Anyway, I don't have any idea about the costs involved with
> HAVE_RCU_TABLE_FREE, but I don't think its much.. otherwise these other
> platforms (PPC,SPARC) wouldn't have used it, gup_fast() is a very
> specific case, whereas mmu-gather is something affecting pretty much all
> tasks. 

Which reminds me, I thought Xen needed this too, but a git grep on
HAVE_RCU_TABLE_FREE shows its still only ppc and sparc.

Jeremy?
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