On Fri, Jul 12, 2013 at 12:14:08PM +0200, Peter Zijlstra wrote: > On Thu, Jul 11, 2013 at 03:09:14PM +0100, Mel Gorman wrote: > > That might be necessary when the machine is overloaded. As a > > starting point the following should retry the migrate a number of times > > until success. The retry is checked on every fault but should not fire > > more than once every 100ms. > > Yeah, something like that might work. But getting a working imbalance bound is > important. The current very weak direct migration is the only thing that keeps > the system from massively skewing load. I've corrected a flaw in that proposed patch, pulled in the check for dst load vs src load, and am adding another patch that will fallback to less preferred nodes if task_numa_find_cpu fails to find a suitable CPU. -- Mel Gorman SUSE Labs -- 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>