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| author |   Frederic Weisbecker <frederic@kernel.org> | 2018-04-06 04:32:37 +0200 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-04-09 11:54:57 +0200 |
| commit | 2bc629a692a76b9ee3dab9c303e3f501bece66a4 (patch) | |
| tree | 228053069ba53acb9f5e11d5d6c6cfbcc075e460 /kernel/time/tick-sched.c | |
| parent | cpuidle: menu: Avoid selecting shallow states with stopped tick (diff) | |
| download | linux-dev-2bc629a692a76b9ee3dab9c303e3f501bece66a4.tar.xz linux-dev-2bc629a692a76b9ee3dab9c303e3f501bece66a4.zip | |
nohz: Gather tick_sched booleans under a common flag field
Optimize the space and leave plenty of room for further flags.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
[ rjw: Do not use __this_cpu_read() to access tick_stopped and add
got_idle_tick to avoid overloading inidle ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/time/tick-sched.c')
| -rw-r--r-- | kernel/time/tick-sched.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index edb9d49b4996..a9d5cc7406d3 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -465,7 +465,9 @@ __setup("nohz=", setup_tick_nohz); bool tick_nohz_tick_stopped(void) { - return __this_cpu_read(tick_cpu_sched.tick_stopped); + struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched); + + return ts->tick_stopped; } bool tick_nohz_tick_stopped_cpu(int cpu) @@ -1014,8 +1016,8 @@ bool tick_nohz_idle_got_tick(void) { struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched); - if (ts->inidle > 1) { - ts->inidle = 1; + if (ts->got_idle_tick) { + ts->got_idle_tick = 0; return true; } return false; @@ -1161,7 +1163,7 @@ static void tick_nohz_handler(struct clock_event_device *dev) ktime_t now = ktime_get(); if (ts->inidle) - ts->inidle = 2; + ts->got_idle_tick = 1; dev->next_event = KTIME_MAX; @@ -1261,7 +1263,7 @@ static enum hrtimer_restart tick_sched_timer(struct hrtimer *timer) ktime_t now = ktime_get(); if (ts->inidle) - ts->inidle = 2; + ts->got_idle_tick = 1; tick_sched_do_timer(now); |