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Groups > linux.kernel > #1205054

[PATCH v2 3/3] sched/numa: Remove NUMA sched feature

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Variable sched_numa_balancing is available for both CONFIG_SCHED_DEBUG
and !CONFIG_SCHED_DEBUG. All code paths now check for
sched_numa_balancing. Hence remove sched_feat(NUMA).

Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---
 kernel/sched/core.c     |  6 ------
 kernel/sched/features.h | 16 ----------------
 2 files changed, 22 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 7cbdf44..d02570b 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2063,12 +2063,6 @@ __read_mostly bool sched_numa_balancing;
 void set_numabalancing_state(bool enabled)
 {
 	sched_numa_balancing = enabled;
-#ifdef CONFIG_SCHED_DEBUG
-	if (enabled)
-		sched_feat_set("NUMA");
-	else
-		sched_feat_set("NO_NUMA");
-#endif /* CONFIG_SCHED_DEBUG */
 }
 
 #ifdef CONFIG_PROC_SYSCTL
diff --git a/kernel/sched/features.h b/kernel/sched/features.h
index 83a50e7..8baa708 100644
--- a/kernel/sched/features.h
+++ b/kernel/sched/features.h
@@ -72,19 +72,3 @@ SCHED_FEAT(RT_PUSH_IPI, true)
 SCHED_FEAT(FORCE_SD_OVERLAP, false)
 SCHED_FEAT(RT_RUNTIME_SHARE, true)
 SCHED_FEAT(LB_MIN, false)
-
-/*
- * Apply the automatic NUMA scheduling policy. Enabled automatically
- * at runtime if running on a NUMA machine. Can be controlled via
- * numa_balancing=
- */
-#ifdef CONFIG_NUMA_BALANCING
-
-/*
- * NUMA will favor moving tasks towards nodes where a higher number of
- * hinting faults are recorded during active load balancing. It will
- * resist moving tasks towards nodes where a lower number of hinting
- * faults have been recorded.
- */
-SCHED_FEAT(NUMA,	true)
-#endif
-- 
1.8.3.1

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Thread

[PATCH v2 0/3] Disable sched_numa_balancing on uma systems Srikar Dronamraju <srikar@linux.vnet.ibm.com> - 2015-08-11 13:10 +0200
  [PATCH v2 3/3] sched/numa: Remove NUMA sched feature Srikar Dronamraju <srikar@linux.vnet.ibm.com> - 2015-08-11 13:10 +0200
    Re: [PATCH v2 3/3] sched/numa: Remove NUMA sched feature Peter Zijlstra <peterz@infradead.org> - 2015-08-11 13:20 +0200
  [PATCH v2 2/3] sched/numa: Disable sched_numa_balancing on uma systems Srikar Dronamraju <srikar@linux.vnet.ibm.com> - 2015-08-11 13:10 +0200
  [PATCH v2 4/4] sched/numa: Convert sched_numa_balancing to a static_branch Srikar Dronamraju <srikar@linux.vnet.ibm.com> - 2015-08-11 18:30 +0200

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