Messages in this thread | | | Date | Tue, 10 Apr 2012 22:47:12 -0300 | From | Marcelo Tosatti <> | Subject | Re: [PATCH 00/13] KVM: MMU: fast page fault |
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On Tue, Apr 10, 2012 at 01:04:13PM +0300, Avi Kivity wrote: > On 04/09/2012 10:46 PM, Marcelo Tosatti wrote: > > Perhaps the mmu_lock hold times by get_dirty are a large component here? > > That's my concern, because it affects the scaling of migration for wider > guests. > > > If that can be alleviated, not only RO->RW faults benefit. > > Those are the most common types of faults on modern hardware, no?
Depends on your workload, of course. If there is memory pressure, 0->PRESENT might be very frequent. My point is that reduction of mmu_lock contention is a good thing overall.
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