On Thu, Dec 10, 2020 at 01:22:02PM +0100, Paolo Bonzini wrote: > On 10/12/20 13:14, Peter Zijlstra wrote: > > On Thu, Dec 10, 2020 at 12:42:36PM +0100, Paolo Bonzini wrote: > > > On 07/12/20 18:41, Thomas Gleixner wrote: > > > > Right this happens still occasionally, but for quite some time this is > > > > 100% firmware sillyness and not a fundamental property of the hardware > > > > anymore. > > > > > > It's still a fundamental property of old hardware. Last time I tried to > > > kill support for processors earlier than Core 2, I had to revert it. > > > That's > > > older than Nehalem. > > > > Core2 doesn't use TSC for timekeeping anyway. KVM shouldn't either. > > On Core2, KVM guests pass TSC through kvmclock in order to get something > usable and not incredibly slow.
Which is incredibly wrong.
