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Date: Tue, 15 Jul 2008 15:12:22 +0300 From: Avi Kivity <avi@...ranet.com> To: kvm@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Marcelo Tosatti <mtosatti@...hat.com> Subject: [PATCH 03/19] KVM: move slots_lock acquision down to vapic_exit From: Marcelo Tosatti <mtosatti@...hat.com> There is no need to grab slots_lock if the vapic_page will not be touched. Signed-off-by: Marcelo Tosatti <mtosatti@...hat.com> Signed-off-by: Avi Kivity <avi@...ranet.com> --- arch/x86/kvm/x86.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 0fbc032..ef53d88 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -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; } -- 1.5.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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