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Date: Fri, 2 Oct 2015 07:48:25 +0530
From: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To: Ingo Molnar <mingo@...nel.org>,
Peter Zijlstra <peterz@...radead.org>
Cc: linux-kernel@...r.kernel.org, srikar@...ux.vnet.ibm.com,
Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>
Subject: [PATCH] sched: Fix task_tick_fair from disabling numa_balancing
If static branch sched_numa_balancing is enabled, it should kickstart
numa_balancing through task_tick_numa(). However Commit 2a1ed24
("sched/numa: Convert sched_numa_balancing to a static_branch")
erroneously disables this.
Fix this anomaly by enabling task_tick_numa when static branch
sched_numa_balancing is enabled.
Signed-off-by: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
---
kernel/sched/fair.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 4df37a4..3bdc3da 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7881,7 +7881,7 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued)
entity_tick(cfs_rq, se, queued);
}
- if (!static_branch_unlikely(&sched_numa_balancing))
+ if (static_branch_unlikely(&sched_numa_balancing))
task_tick_numa(rq, curr);
}
--
2.1.4
--
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