On Tue, 2010-05-04 at 00:41 -0700, Avi Kivity wrote: > On 05/04/2010 12:45 AM, H. Peter Anvin wrote: > > > >> I was trying to avoid a performance regression relative to the current > >> code, as it appears that some care was taken to avoid the memory reference. > >> > >> I agree that it's probably negligible compared to the save/restore > >> code. If the x86 maintainers agree as well, I'll replace it with > >> cpu_has_xsave. > >> > >> > > I asked Suresh to comment on this, since he wrote the original code. He > > did confirm that the intent was to avoid a global memory reference. > > > > > > Ok, so you're happy with the patch as is? As use_xsave() is in the hot context switch path, I would like to go with Avi's proposal. thanks, suresh -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
