On Fri, 20 Sep 2013, Thomas Gleixner wrote: > Now when a cpu becomes isolated we stop the callback scheduling on > that cpu and assign it to the cpu with the smallest NUMA > distance. So that cpu will process the data for itself and for the > newly isolated cpu.
That is not possible for many percpu threads since they rely on running on a specific cpu for optimization purposes. Running on a different processor makes these threads racy. What is needed is to be able to switch these things off and on. Something on a different cpu may monitor if processing on that specific cpu is needed or not but it cannot perform the vmstat updates. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
