diff options
| author | Eddie Dong <eddie.dong@intel.com> | 2007-09-03 16:15:12 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-10-13 10:18:26 +0200 |
| commit | a3d7f85f471f889e4477863a7ca42828ae74e77d (patch) | |
| tree | f75148a940f7e297da91f6a14ab573291ceb050f /drivers/kvm/lapic.c | |
| parent | 1b9778dae71dc64d3678d766c0f1fbed79c80f9f (diff) | |
KVM: Migrate lapic hrtimer when vcpu moves to another cpu
This reduces overhead by accessing cachelines from the wrong node, as well
as simplifying locking.
[Qing: fix for inactive or expired one-shot timer]
Signed-off-by: Yaozu (Eddie) Dong <Eddie.Dong@intel.com>
Signed-off-by: Qing He <qing.he@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/lapic.c')
| -rw-r--r-- | drivers/kvm/lapic.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/kvm/lapic.c b/drivers/kvm/lapic.c index 490d4939dba..2706ec36c25 100644 --- a/drivers/kvm/lapic.c +++ b/drivers/kvm/lapic.c @@ -979,3 +979,17 @@ void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu) update_divide_count(apic); start_apic_timer(apic); } + +void kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) +{ + struct kvm_lapic *apic = vcpu->apic; + struct hrtimer *timer; + + if (!apic) + return; + + timer = &apic->timer.dev; + if (hrtimer_cancel(timer)) + hrtimer_start(timer, timer->expires, HRTIMER_MODE_ABS); +} +EXPORT_SYMBOL_GPL(kvm_migrate_apic_timer); |