On 07/18/2012 04:37 PM, Raghavendra K T wrote: > Currently Pause Loop Exit (PLE) handler is doing directed yield to a > random vcpu on pl-exit. We already have filtering while choosing > the candidate to yield_to. This change adds more checks while choosing > a candidate to yield_to. > > On a large vcpu guests, there is a high probability of > yielding to the same vcpu who had recently done a pause-loop exit. > Such a yield can lead to the vcpu spinning again. > > The patchset keeps track of the pause loop exit and gives chance to a > vcpu which has: > > (a) Not done pause loop exit at all (probably he is preempted lock-holder) > > (b) vcpu skipped in last iteration because it did pause loop exit, and > probably has become eligible now (next eligible lock holder) > > This concept also helps in cpu relax interception cases which use same handler. > Thanks, applied to 'queue'. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
