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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2015-04-08 20:33:25 -0300 |
|---|---|---|
| committer | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-02-13 00:36:28 +0100 |
| commit | 692083f607b041b1da1fccc48f36fa83b4f5d0cd (patch) | |
| tree | 254bc85290251f84eccbf5ccf5647171ea891b6e | |
| parent | 4fb5a7b5d2c325966c525a18c135da36823794ad (diff) | |
| download | rt-linux-692083f607b041b1da1fccc48f36fa83b4f5d0cd.tar.gz | |
KVM: lapic: mark LAPIC timer handler as irqsafe
Since lapic timer handler only wakes up a simple waitqueue,
it can be executed from hardirq context.
Reduces average cyclictest latency by 3us.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
| -rw-r--r-- | arch/x86/kvm/lapic.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 4d30b865be306..b8393e285f37a 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1801,6 +1801,7 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu) hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); apic->lapic_timer.timer.function = apic_timer_fn; + apic->lapic_timer.timer.irqsafe = 1; /* * APIC is created enabled. This will prevent kvm_lapic_set_base from |