> I regret not pressing harder when we sanctified this frequency > difference ... too late to make kvm clock follow the boot clock? :) > --- > arch/x86/kvm/x86.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index b54125b590e8..b8aad0969690 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -4180,9 +4180,15 @@ long kvm_arch_vm_ioctl(struct file *filp, > goto out; > > r = 0; > + /* > + * TODO: userspace has to take care of races with VCPU_RUN, so > + * kvm_gen_update_masterclock() can be cut down to locked > + * pvclock_update_vm_gtod_copy(). > + */ > + kvm_gen_update_masterclock(kvm); > now_ns = get_kvmclock_ns(kvm); > kvm->arch.kvmclock_offset += user_ns.clock - now_ns; > - kvm_gen_update_masterclock(kvm); > + kvm_make_all_cpus_request(kvm, KVM_REQ_CLOCK_UPDATE); > break; Looks good, though I'd still prefer to do what the TODO says... I'll try to put together a patch today. Paolo
