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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2012-01-24 18:59:43 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2012-02-15 15:23:09 +0100 |
| commit | 15f827be93928890bba965bc175caee50c4406d2 (patch) | |
| tree | f858d834563a8f47327fbd4792dcf3b5499901b9 /kernel/time | |
| parent | nohz: Remove update_ts_time_stat from tick_nohz_start_idle (diff) | |
| download | linux-15f827be93928890bba965bc175caee50c4406d2.tar.xz linux-15f827be93928890bba965bc175caee50c4406d2.zip | |
nohz: Remove ts->Einidle checks before restarting the tick
ts->inidle is set by tick_nohz_idle_enter() and unset by
tick_nohz_idle_exit(). However these two calls are assumed
to be always paired. This means that by the time we call
tick_nohz_idle_exit(), ts->inidle is supposed to be always
set to 1.
Remove the checks for ts->inidle in tick_nohz_idle_exit().
This simplifies a bit the code and improves its debuggability
(ie: ensure the call is paired with a tick_nohz_idle_enter()
call).
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: Yong Zhang <yong.zhang0@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Ingo Molnar <mingo@elte.hu>
Link: http://lkml.kernel.org/r/1327427984-23282-2-git-send-email-fweisbec@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/tick-sched.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 8cfffd9d9ce9..3526038f2836 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -558,20 +558,21 @@ void tick_nohz_idle_exit(void) local_irq_disable(); - if (ts->idle_active || (ts->inidle && ts->tick_stopped)) + WARN_ON_ONCE(!ts->inidle); + + ts->inidle = 0; + + if (ts->idle_active || ts->tick_stopped) now = ktime_get(); if (ts->idle_active) tick_nohz_stop_idle(cpu, now); - if (!ts->inidle || !ts->tick_stopped) { - ts->inidle = 0; + if (!ts->tick_stopped) { local_irq_enable(); return; } - ts->inidle = 0; - /* Update jiffies first */ select_nohz_load_balancer(0); tick_do_update_jiffies64(now); |