On Sat, Jul 06, 2013 at 12:09:00AM +0100, Mel Gorman wrote: > The third reason is that multiple threads in a process will race each > other to fault the shared page making the fault information unreliable. Ingo and I played around with that particular issue for a while and we had a patch that worked fairly well for cpu bound threads and made sure the task_numa_work() thing indeed interleaved between the threads and wasn't done by the same thread every time. I don't know what the current code does and if that is indeed still an issue. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>