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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2019-02-12 12:27:01 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-02-13 10:34:13 +0300 |
| commit | c89d92eddfad11e912fb506f85e1796064a9f9d2 (patch) | |
| tree | 475797f3ce1899bad0098b86a7ca61a1fe5587e5 | |
| parent | 1b5500d73466c62fe048153f0cea1610d2543c7f (diff) | |
| download | linux-c89d92eddfad11e912fb506f85e1796064a9f9d2.tar.xz | |
sched/fair: Use non-atomic cpumask_{set,clear}_cpu()
The cpumasks updated here are not subject to concurrency and using
atomic bitops for them is pointless and expensive. Use the non-atomic
variants instead.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Link: http://lkml.kernel.org/r/2e2a10f84b9049a81eef94ed6d5989447c21e34a.1549963617.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | kernel/sched/fair.c | 6 | ||||
| -rw-r--r-- | kernel/sched/isolation.c | 2 |
2 files changed, 4 insertions, 4 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 8abd1c271499..8213ff6e365d 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6097,7 +6097,7 @@ static int select_idle_core(struct task_struct *p, struct sched_domain *sd, int bool idle = true; for_each_cpu(cpu, cpu_smt_mask(core)) { - cpumask_clear_cpu(cpu, cpus); + __cpumask_clear_cpu(cpu, cpus); if (!available_idle_cpu(cpu)) idle = false; } @@ -9105,7 +9105,7 @@ more_balance: if ((env.flags & LBF_DST_PINNED) && env.imbalance > 0) { /* Prevent to re-select dst_cpu via env's CPUs */ - cpumask_clear_cpu(env.dst_cpu, env.cpus); + __cpumask_clear_cpu(env.dst_cpu, env.cpus); env.dst_rq = cpu_rq(env.new_dst_cpu); env.dst_cpu = env.new_dst_cpu; @@ -9132,7 +9132,7 @@ more_balance: /* All tasks on this runqueue were pinned by CPU affinity */ if (unlikely(env.flags & LBF_ALL_PINNED)) { - cpumask_clear_cpu(cpu_of(busiest), cpus); + __cpumask_clear_cpu(cpu_of(busiest), cpus); /* * Attempting to continue load balancing at the current * sched_domain level only makes sense if there are diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index 81faddba9e20..b02d148e7672 100644 --- a/kernel/sched/isolation.c +++ b/kernel/sched/isolation.c @@ -80,7 +80,7 @@ static int __init housekeeping_setup(char *str, enum hk_flags flags) cpumask_andnot(housekeeping_mask, cpu_possible_mask, non_housekeeping_mask); if (cpumask_empty(housekeeping_mask)) - cpumask_set_cpu(smp_processor_id(), housekeeping_mask); + __cpumask_set_cpu(smp_processor_id(), housekeeping_mask); } else { cpumask_var_t tmp; |