On Thu, Jul 11, 2013 at 04:23:58PM +0530, Raghavendra K T wrote: > On 07/11/2013 03:41 PM, Gleb Natapov wrote: > >On Thu, Jul 11, 2013 at 03:40:38PM +0530, Raghavendra K T wrote: > >>>>>>Gleb, > >>>>>>Can you elaborate little more on what you have in mind regarding per > >>>>>>VM ple_window. (maintaining part of it as a per vm variable is clear > >>>>>>to > >>>>>> me), but is it that we have to load that every time of guest entry? > >>>>>> > >>>>>Only when it changes, shouldn't be to often no? > >>>> > >>>>Ok. Thinking how to do. read the register and writeback if there need > >>>>to be a change during guest entry? > >>>> > >>>Why not do it like in the patch you've linked? When value changes write it > >>>to VMCS of the current vcpu. > >>> > >> > >>Yes. can be done. So the running vcpu's ple_window gets updated only > >>after next pl-exit. right? > >I am not sure what you mean. You cannot change vcpu's ple_window while > >vcpu is in a guest mode. > > > > I agree with that. Both of us are on the same page. > What I meant is, > suppose the per VM ple_window changes when a vcpu x of that VM was running, > it will get its ple_window updated during next run. Ah, I think "per VM" is what confuses me. Why do you want to have "per VM" ple_windows and not "per vcpu" one? With per vcpu one ple_windows cannot change while vcpu is running. -- Gleb. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
