commit 04bb2f947 (sched/numa: Adjust scan rate in task_numa_placement) calculate period_slot which should be used as base value of scan rate increase if remote access dominate. However, current codes forget to use it, this patch fix it. Signed-off-by: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx> --- kernel/sched/fair.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 7073c76..b077f1b3 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1358,7 +1358,7 @@ static void update_task_scan_period(struct task_struct *p, */ period_slot = DIV_ROUND_UP(diff, NUMA_PERIOD_SLOTS); ratio = DIV_ROUND_UP(private * NUMA_PERIOD_SLOTS, (private + shared)); - diff = (diff * ratio) / NUMA_PERIOD_SLOTS; + diff = (period_slot * ratio) / NUMA_PERIOD_SLOTS; } p->numa_scan_period = clamp(p->numa_scan_period + diff, -- 1.7.5.4 -- 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>