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 <[email protected]>
Reviewed-by: Rik van Riel <[email protected]> -- All rights reversed -- 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/
