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| author | Peter Zijlstra | 2017-12-21 10:11:09 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2018-03-09 07:59:16 +0100 |
| commit | b7031a02ec753bf9b52a94a966b05e1abad3b7a9 (patch) | |
| tree | 0a5d1d9105bce0a900850e6704e808d345751668 /kernel/sched/core.c | |
| parent | sched/core: Convert nohz_flags to atomic_t (diff) | |
| download | kernel-qcow2-linux-b7031a02ec753bf9b52a94a966b05e1abad3b7a9.tar.gz kernel-qcow2-linux-b7031a02ec753bf9b52a94a966b05e1abad3b7a9.tar.xz kernel-qcow2-linux-b7031a02ec753bf9b52a94a966b05e1abad3b7a9.zip | |
sched/fair: Add NOHZ_STATS_KICK
Split the NOHZ idle balancer into doing two separate actions:
- update blocked load statistic
- actually load-balance
Since the latter requires the former, ensure this happens. For now
always tag both bits at the same time.
Prepares for a future where we can toggle only the STATS bit.
Suggested-by: Vincent Guittot <vincent.guittot@linaro.org>
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 | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 96ad1c003d74..69c9a6b07b61 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 (!(atomic_read(nohz_flags(cpu)) & NOHZ_BALANCE_KICK)) + if (!(atomic_read(nohz_flags(cpu)) & NOHZ_KICK_MASK)) 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 */ - atomic_andnot(NOHZ_BALANCE_KICK, nohz_flags(cpu)); + atomic_andnot(NOHZ_KICK_MASK, nohz_flags(cpu)); return false; } |