[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Thu, 12 Dec 2013 08:12:23 +0800
From: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
To: Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Subject: [PATCH v7 4/4] sched/numa: fix period_slot recalculation
Changelog:
v3 -> v4:
* remove period_slot recalculation
The original code is as intended and was meant to scale the difference
between the NUMA_PERIOD_THRESHOLD and local/remote ratio when adjusting
the scan period. The period_slot recalculation can be dropped.
Reviewed-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Acked-by: Mel Gorman <mgorman@...e.de>
Signed-off-by: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
---
kernel/sched/fair.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index d93c86f..c962167 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1356,7 +1356,6 @@ static void update_task_scan_period(struct task_struct *p,
* scanning faster if shared accesses dominate as it may
* simply bounce migrations uselessly
*/
- 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;
}
--
1.8.3.2
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists