On Tue, 2015-10-27 at 03:51 -0600, Jan Beulich wrote: > > > > On 27.10.15 at 06:19, <feng...@intel.com> wrote: > > > From: Dario Faggioli [mailto:dario.faggi...@citrix.com] > > > Sent: Monday, October 26, 2015 10:40 PM > > > In any case, it would have been nice, given the situation, if > > > you'd have put a few > > > words about, e.g., which solution you ended up implementing and > > > why, either in > > > the cover or here (e.g., in the '---' area). > > > > Thanks for the suggestion. As I mentioned before, updating the PI > > descriptor > > needs > > to be atomic, I think it should be a little expensive. So doing it > > every > > VM-exit seems > > not a good idea to me. > > You could check whether any update is needed before doing the > (atomic) cmpxchg16b. > Indeed! Do we have enough state, when in the VMX entry/exit handlers, to check that? If yes, I really think this solution is worth at least a try.
Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)
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