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[1/2] sched/fair: make capacity_margin __read_mostly

Message ID 1506121484-8260-1-git-send-email-leo.yan@linaro.org
State Superseded
Headers show
Series [1/2] sched/fair: make capacity_margin __read_mostly | expand

Commit Message

Leo Yan Sept. 22, 2017, 11:04 p.m. UTC 
Variable 'capacity_margin' is used with read operation for most cases
to calculate the capacity margin, put it into __read_mostly section.

Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: Chris Redpath <Chris.Redpath@arm.com>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Leo Yan <leo.yan@linaro.org>

---
 kernel/sched/fair.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.7.4
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Patch

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 70ba32e..ad03bf4 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -129,7 +129,7 @@  unsigned int sysctl_sched_cfs_bandwidth_slice		= 5000UL;
  *
  * (default: ~20%)
  */
-unsigned int capacity_margin				= 1280;
+unsigned int capacity_margin __read_mostly		= 1280;
 
 static inline void update_load_add(struct load_weight *lw, unsigned long inc)
 {