Commit 3fca0365 authored by Yaozu Dong's avatar Yaozu Dong Committed by Avi Kivity
Browse files

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: default avatarAvi 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);