On 10/07/2013 06:29 AM, Mel Gorman wrote: > From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > This patch classifies scheduler domains and runqueues into types depending > the number of tasks that are about their NUMA placement and the number > that are currently running on their preferred node. The types are > > regular: There are tasks running that do not care about their NUMA > placement. > > remote: There are tasks running that care about their placement but are > currently running on a node remote to their ideal placement > > all: No distinction > > To implement this the patch tracks the number of tasks that are optimally > NUMA placed (rq->nr_preferred_running) and the number of tasks running > that care about their placement (nr_numa_running). The load balancer > uses this information to avoid migrating idea placed NUMA tasks as long > as better options for load balancing exists. For example, it will not > consider balancing between a group whose tasks are all perfectly placed > and a group with remote tasks. > > Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > 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>