On Fri, Aug 23, 2013 at 01:31:43PM +0300, Gleb Natapov wrote: > On Fri, Aug 23, 2013 at 12:22:30PM +0200, Peter Zijlstra wrote: > > On Wed, Jul 10, 2013 at 10:21:57PM -0300, Marcelo Tosatti wrote: > > > > > > Linux as a guest on KVM hypervisor, the only user of the pvclock > > > vsyscall interface, does not require notification on task migration > > > because: > > > > > > 1. cpu ID number maps 1:1 to per-CPU pvclock time info. > > > 2. per-CPU pvclock time info is updated if the > > > underlying CPU changes. > > > 3. that version is increased whenever underlying CPU > > > changes. > > > > > > Which is sufficient to guarantee nanoseconds counter > > > is calculated properly. > > > > > > Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com> > > > > What happened to this patch? I don't see it in my current tree, nor do I > > find it in the kvm tree. > > > e04c5d76b0cfb66cadd900cf147526f2271884b8 in kvm.git next branch.
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