* [PATCH] take srcu lock before call to complete_pio()
@ 2010-03-09 10:01 Gleb Natapov
2010-03-09 12:46 ` Avi Kivity
0 siblings, 1 reply; 2+ messages in thread
From: Gleb Natapov @ 2010-03-09 10:01 UTC (permalink / raw)
To: avi, mtosatti; +Cc: kvm
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.
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2010-03-09 10:01 [PATCH] take srcu lock before call to complete_pio() Gleb Natapov
2010-03-09 12:46 ` Avi Kivity
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