On Mon, Jun 04, 2018 at 03:30:18PM +0530, Srikar Dronamraju wrote: > There are checks in migrate_swap_stop that check if the task/cpu > combination is as per migrate_swap_arg before migrating. > > However atleast one of the two tasks to be swapped by migrate_swap could > have migrated to a completely different cpu before updating the > migrate_swap_arg. The new cpu where the task is currently running could > be a different node too. If the task has migrated, numa balancer might > end up placing a task in a wrong node. Instead of achieving node > consolidation, it may end up spreading the load across nodes. > > To avoid that pass the cpus as additional parameters. > > While here, place migrate_swap under CONFIG_NUMA_BALANCING. > > Signed-off-by: Srikar Dronamraju <[email protected]>
Acked-by: Mel Gorman <[email protected]> -- Mel Gorman SUSE Labs
