On Wed, Jul 18, 2018 at 01:22:19PM -0400, Rik van Riel wrote: > > On Jul 18, 2018, at 12:00 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > Also, I don't suppose you've looked at the paravirt instances of > > flush_tlb_other() ? They don't elide the flushes because of lazy. > > Let me look at those now :) <snip xen> > kvm_flush_tlb_other takes out preempted VCPUs from the flush mask, > before calling native_flush_tlb_others, so it should get the optimization > automatically. Ah, ok. I wasn't entirely sure the new lazy was purely for the idle case. But yes, the KVM paravirt thing should get the idle case right. > Hyperv does ... sad magic. Yeah,.. it got us to switch to 'rcu' freeing of page-tables and enabled the kvm thing though, so that all is good :-) -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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