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| author | Chuansheng Liu <chuansheng.liu@intel.com> | 2014-09-04 15:17:55 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-09-19 12:35:16 +0200 |
| commit | 2ed903c5485bad0eafdd3d59ff993598736e4f31 (patch) | |
| tree | 11fbb80a8589d123a89f85f2cbfda9f7bb9589a3 /drivers/cpuidle/cpuidle.c | |
| parent | c6f4459fc3ba532e896cb678e29b45cb985f82bf (diff) | |
| download | linux-2ed903c5485bad0eafdd3d59ff993598736e4f31.tar.bz2 | |
cpuidle: Use wake_up_all_idle_cpus() to wake up all idle cpus
Currently kick_all_cpus_sync() or smp_call_function() can not
break the polling idle cpu immediately.
Instead using wake_up_all_idle_cpus() which can wake up the polling idle
cpu quickly is much more helpful for power.
Signed-off-by: Chuansheng Liu <chuansheng.liu@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: linux-pm@vger.kernel.org
Cc: changcheng.liu@intel.com
Cc: xiaoming.wang@intel.com
Cc: souvik.k.chakravarty@intel.com
Cc: luto@amacapital.net
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: linux-pm@vger.kernel.org
Link: http://lkml.kernel.org/r/1409815075-4180-3-git-send-email-chuansheng.liu@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/cpuidle/cpuidle.c')
| -rw-r--r-- | drivers/cpuidle/cpuidle.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index ee9df5e3f5eb..d31e04ca8703 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -223,7 +223,7 @@ void cpuidle_uninstall_idle_handler(void) { if (enabled_devices) { initialized = 0; - kick_all_cpus_sync(); + wake_up_all_idle_cpus(); } } @@ -530,11 +530,6 @@ EXPORT_SYMBOL_GPL(cpuidle_register); #ifdef CONFIG_SMP -static void smp_callback(void *v) -{ - /* we already woke the CPU up, nothing more to do */ -} - /* * This function gets called when a part of the kernel has a new latency * requirement. This means we need to get all processors out of their C-state, @@ -544,7 +539,7 @@ static void smp_callback(void *v) static int cpuidle_latency_notify(struct notifier_block *b, unsigned long l, void *v) { - smp_call_function(smp_callback, NULL, 1); + wake_up_all_idle_cpus(); return NOTIFY_OK; } |