On 3/4/2013 10:02 AM, Raghavendra K T wrote:
From: Raghavendra K T <raghavendra...@linux.vnet.ibm.com>This helps in filtering out the eligible candidates further and thus potentially helps in quickly allowing preempted lockholders to run. Note that if a vcpu was spinning during preemption we filter them by checking whether they are preempted due to pause loop exit. Signed-off-by: Raghavendra K T <raghavendra...@linux.vnet.ibm.com> --- virt/kvm/kvm_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 83a804c..60114e1 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1790,6 +1790,8 @@ void kvm_vcpu_on_spin(struct kvm_vcpu *me) continue; } else if (pass && i > last_boosted_vcpu) break; + if (!ACCESS_ONCE(vcpu->preempted)) + continue; if (vcpu == me) continue; if (waitqueue_active(&vcpu->wq)) .
Reviewed-by: Chegu Vinod <chegu_vi...@hp.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
