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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2013-04-20 15:27:08 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2013-04-22 20:16:04 +0200 |
| commit | ff442c51f6543378cf23107c75b7949dc64a9119 (patch) | |
| tree | 7c3cf3031f0bb0b8f0c9e8a170d17922b3bd1926 /include/linux/tick.h | |
| parent | ce831b38ca4920739a7a5b0c73b921da41f03718 (diff) | |
| download | op-kernel-dev-ff442c51f6543378cf23107c75b7949dc64a9119.zip op-kernel-dev-ff442c51f6543378cf23107c75b7949dc64a9119.tar.gz | |
nohz: Re-evaluate the tick from the scheduler IPI
The scheduler IPI is used by the scheduler to kick
full dynticks CPUs asynchronously when more than one
task are running or when a new timer list timer is
enqueued. This way the destination CPU can decide
to restart the tick to handle this new situation.
Now let's call that kick in the scheduler IPI.
(Reusing the scheduler IPI rather than implementing
a new IPI was suggested by Peter Zijlstra a while ago)
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Gilad Ben Yossef <gilad@benyossef.com>
Cc: Hakan Akkan <hakanakkan@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/tick.h')
| -rw-r--r-- | include/linux/tick.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/tick.h b/include/linux/tick.h index d290168..e31e676 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -160,11 +160,13 @@ static inline u64 get_cpu_iowait_time_us(int cpu, u64 *unused) { return -1; } #ifdef CONFIG_NO_HZ_FULL extern void tick_nohz_init(void); extern int tick_nohz_full_cpu(int cpu); +extern void tick_nohz_full_check(void); extern void tick_nohz_full_kick(void); extern void tick_nohz_full_kick_all(void); #else static inline void tick_nohz_init(void) { } static inline int tick_nohz_full_cpu(int cpu) { return 0; } +static inline void tick_nohz_full_check(void) { } static inline void tick_nohz_full_kick(void) { } static inline void tick_nohz_full_kick_all(void) { } #endif |
