Messages in this thread | | | Date | Tue, 10 Oct 2017 21:17:17 +0200 | From | Radim Krčmář <> | Subject | Re: [PATCH] KVM: SVM: unconditionally wake up VCPU on IOMMU interrupt |
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2017-10-10 12:57+0200, Paolo Bonzini: > Checking the mode is unnecessary, and is done without a memory barrier > separating the LAPIC write from the vcpu->mode read; in addition, > kvm_vcpu_wake_up is already doing a check for waiters on the wait queue > that has the same effect. > > In practice it's safe because spin_lock has full-barrier semantics on x86, > but don't be too clever. > > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> > ---
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
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