From: Gleb Natapov <gleb@redhat.com>
To: avi@redhat.com, mtosatti@redhat.com
Cc: kvm@vger.kernel.org
Subject: [PATCH] take srcu lock before call to complete_pio()
Date: Tue, 9 Mar 2010 12:01:10 +0200 [thread overview]
Message-ID: <20100309100110.GM16909@redhat.com> (raw)
complete_pio() may use slot table which is protected by srcu.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 703f637..3753c11 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4519,7 +4519,9 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
kvm_set_cr8(vcpu, kvm_run->cr8);
if (vcpu->arch.pio.cur_count) {
+ vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
r = complete_pio(vcpu);
+ srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
if (r)
goto out;
}
--
Gleb.
next reply other threads:[~2010-03-09 10:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-09 10:01 Gleb Natapov [this message]
2010-03-09 12:46 ` [PATCH] take srcu lock before call to complete_pio() Avi Kivity
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