Commit 3fca0365 authored Apr 25, 2007 by Yaozu Dong Committed by Avi Kivity May 03, 2007

KVM: VMX: Avoid unnecessary vcpu_load()/vcpu_put() cycles



By checking if a reschedule is needed, we avoid dropping the vcpu.

[With changes by me, based on Anthony Liguori's observations]

Signed-off-by: Avi Kivity <avi@qumranet.com>

parent d6c69ee9

drivers/kvm/kvm_main.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1590,6 +1590,8 @@ static int set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)

		void kvm_resched(struct kvm_vcpu *vcpu)
		{
		if (!need_resched())
		return;
		vcpu_put(vcpu);
		cond_resched();
		vcpu_load(vcpu);