On 04/22/2013 04:46 PM, Jiannan Ouyang wrote:
It would still be very interesting to conduct more experiments to compare these two, to see if the fairness enforced by pv_lock is mandatory, and if preemptable-lock outperforms pv_lock in most cases, and how do they work with PLE.
Given the fairly high cost of rescheduling a VCPU (which is likely to include an IPI), versus the short hold time of most spinlocks, I have the strong suspicion that your approach would win. The fairness is only compromised in a limited way and in certain circumstances, so I am not too worried about that. -- All rights reversed -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
