On Tue, Apr 22, 2014 at 06:27:59PM -0300, Marcelo Tosatti wrote: > On Tue, Apr 22, 2014 at 05:38:07PM -0300, Eduardo Habkost wrote: > > On Tue, Apr 22, 2014 at 04:10:44PM -0300, Marcelo Tosatti wrote: > > > Invariant TSC documentation mentions that "invariant TSC will run at a > > > constant rate in all ACPI P-, C-. and T-states". > > > > > > This is not the case if migration to a host with different TSC frequency > > > is allowed, or if savevm is performed. So block migration/savevm. > > > > > > Also do not expose invariant tsc flag by default. > > > > What do you mean "do not expose invtsc by default", exactly? It is > > already not exposed by default because the default CPU model is qemu64 > > and qemu64 doesn't have it enabled. > > Should be "do not expose invtsc by default with -cpu host". > > Since it blocks migration, i considered it a special flag that should > be set when user is aware that migration is going to be blocked. > > Makes sense?
Not for "-cpu host". If somebody needs migration to work, they shouldn't be using "-cpu host" anyway (I don't know if you have seen the other comments in my message?). -- Eduardo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
