KVM: add kvm_arch_vcpu_runnable() test to kvm_vcpu_on_spin() loop

Use the arch specific function kvm_arch_vcpu_runnable() to add a further
criterium to identify a suitable vcpu to yield to during undirected yield
processing.

Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 98f4a14676127397c54cab7d6119537ed4d113a2)
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 88660cbe70a4b4e2397e556753679dd401438698..9f5fab0a4fdab3cba9958eba5dbd6a941aec76ea 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1800,7 +1800,7 @@ void kvm_vcpu_on_spin(struct kvm_vcpu *me)
                                continue;
                        if (vcpu == me)
                                continue;
-                       if (waitqueue_active(&vcpu->wq))
+                       if (waitqueue_active(&vcpu->wq) && !kvm_arch_vcpu_runnable(vcpu))
                                continue;
                        if (!kvm_vcpu_eligible_for_directed_yield(vcpu))
                                continue;