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-rw-r--r--arch/x86/kvm/x86.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 422ef5e..fd76621 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2627,7 +2627,12 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
kvm_x86_ops->write_tsc_offset(vcpu, offset);
vcpu->arch.tsc_catchup = 1;
}
- kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
+ /*
+ * On a host with synchronized TSC, there is no need to update
+ * kvmclock on vcpu->cpu migration
+ */
+ if (!vcpu->kvm->arch.use_master_clock || vcpu->cpu == -1)
+ kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
if (vcpu->cpu != cpu)
kvm_migrate_timers(vcpu);
vcpu->cpu = cpu;