diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2017-12-21 10:01:24 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-03-09 07:59:16 +0100 |
| commit | a22e47a4e3f5a9e50a827c5d94705ace3b1eac0b (patch) | |
| tree | 907cfb61b5233db6935d234e9de615796d137acf /kernel/sched/core.c | |
| parent | 8f111bc357aa811e0bb5fdfe34c4c9efdafc15b9 (diff) | |
sched/core: Convert nohz_flags to atomic_t
Using atomic_t allows us to use the more flexible bitops provided
there. Also its smaller.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 4f5eeb63ab5b..96ad1c003d74 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -583,7 +583,7 @@ static inline bool got_nohz_idle_kick(void) { int cpu = smp_processor_id(); - if (!test_bit(NOHZ_BALANCE_KICK, nohz_flags(cpu))) + if (!(atomic_read(nohz_flags(cpu)) & NOHZ_BALANCE_KICK)) return false; if (idle_cpu(cpu) && !need_resched()) @@ -593,7 +593,7 @@ static inline bool got_nohz_idle_kick(void) * We can't run Idle Load Balance on this CPU for this time so we * cancel it and clear NOHZ_BALANCE_KICK */ - clear_bit(NOHZ_BALANCE_KICK, nohz_flags(cpu)); + atomic_andnot(NOHZ_BALANCE_KICK, nohz_flags(cpu)); return false; } @@ -6074,7 +6074,7 @@ void __init sched_init(void) rq_attach_root(rq, &def_root_domain); #ifdef CONFIG_NO_HZ_COMMON rq->last_load_update_tick = jiffies; - rq->nohz_flags = 0; + atomic_set(&rq->nohz_flags, 0); #endif #endif /* CONFIG_SMP */ hrtick_rq_init(rq); |