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KVM: move slots_lock acquision down to vapic_exit 

There is no need to grab slots_lock if the vapic_page will not
be touched.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Marcelo Tosatti 2008-06-23 12:04:25 -03:00 committed by Avi Kivity
parent efa67e0d1f
commit f8b78fa3d4
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kvm/x86.c
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@ -2787,8 +2787,10 @@ static void vapic_exit(struct kvm_vcpu *vcpu)
if (!apic || !apic->vapic_addr)
return;
down_read(&vcpu->kvm->slots_lock);
kvm_release_page_dirty(apic->vapic_page);
mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
up_read(&vcpu->kvm->slots_lock);
}
static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
@ -2944,9 +2946,7 @@ out:
post_kvm_run_save(vcpu, kvm_run);
down_read(&vcpu->kvm->slots_lock);
vapic_exit(vcpu);
up_read(&vcpu->kvm->slots_lock);
return r;
}