On Mon, Oct 17, 2016 at 07:11:01PM -0200, Eduardo Habkost wrote: > On Mon, Oct 17, 2016 at 06:24:38PM +0200, Paolo Bonzini wrote: > > On 17/10/2016 16:50, Radim Krčmář wrote: > > > 2016-10-17 07:47-0200, Marcelo Tosatti: > [...] > > >> since Linux guests use kvmclock and Windows guests use Hyper-V > > >> enlightenment, it should be fine to disable 2). > > > > ... and 1 too. > > > > We should also blacklist the TSC deadline timer when invtsc is not > > available.
Actually, a nicer fix would be to check the different frequencies and scale the deadline relative to the difference. This would take care of both patched and non-patched guests. On a related note, what was the goal of Radim's paravirtual deadline TSC timer? > You mean on the guest-side? On the host side, it would make > existing VMs refuse to run. > > -- > Eduardo