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Subject[PATCH v3 09/12] sched/numa: fix task scan rate adjustment
Date
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@linux.vnet.ibm.com>
---
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


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