On 10/07/2013 06:29 AM, Mel Gorman wrote: > NUMA hinting faults will not migrate a shared executable page mapped by > multiple processes on the grounds that the data is probably in the CPU > cache already and the page may just bounce between tasks running on multipl > nodes. Even if the migration is avoided, there is still the overhead of > trapping the fault, updating the statistics, making scheduler placement > decisions based on the information etc. If we are never going to migrate > the page, it is overhead for no gain and worse a process may be placed on > a sub-optimal node for shared executable pages. This patch avoids trapping > faults for shared libraries entirely. > > Signed-off-by: Mel Gorman <mgorman@xxxxxxx> Reviewed-by: Rik van Riel <riel@xxxxxxxxxx> -- All rights reversed -- 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>