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authorFrederic Weisbecker <fweisbec@gmail.com>2015-07-17 22:25:49 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2016-03-02 16:44:27 +0100
commitb78783000d5cb7c5994e6742e1d1ce594bfea15b (patch)
tree8f4468e342ae4e25efb9679e6d93db02f3f0ec6a /include
parent76d92ac305f23cada3a9b3c48a7ccea5f71019cb (diff)
posix-cpu-timers: Migrate to use new tick dependency mask model
Instead of providing asynchronous checks for the nohz subsystem to verify posix cpu timers tick dependency, migrate the latter to the new mask. In order to keep track of the running timers and expose the tick dependency accordingly, we must probe the timers queuing and dequeuing on threads and process lists. Unfortunately it implies both task and signal level dependencies. We should be able to further optimize this and merge all that on the task level dependency, at the cost of a bit of complexity and may be overhead. Reviewed-by: Chris Metcalf <cmetcalf@ezchip.com> Cc: Christoph Lameter <cl@linux.com> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Luiz Capitulino <lcapitulino@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/posix-timers.h3
-rw-r--r--include/linux/tick.h2
2 files changed, 0 insertions, 5 deletions
diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h
index 907f3fd191ac..62d44c176071 100644
--- a/include/linux/posix-timers.h
+++ b/include/linux/posix-timers.h
@@ -128,9 +128,6 @@ void posix_cpu_timer_schedule(struct k_itimer *timer);
void run_posix_cpu_timers(struct task_struct *task);
void posix_cpu_timers_exit(struct task_struct *task);
void posix_cpu_timers_exit_group(struct task_struct *task);
-
-bool posix_cpu_timers_can_stop_tick(struct task_struct *tsk);
-
void set_process_cpu_timer(struct task_struct *task, unsigned int clock_idx,
cputime_t *newval, cputime_t *oldval);
diff --git a/include/linux/tick.h b/include/linux/tick.h
index 0e63db4bc662..21f73649a4dc 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -234,7 +234,6 @@ static inline void tick_dep_clear_signal(struct signal_struct *signal,
}
extern void tick_nohz_full_kick_cpu(int cpu);
-extern void tick_nohz_full_kick_all(void);
extern void __tick_nohz_task_switch(void);
#else
static inline int housekeeping_any_cpu(void)
@@ -259,7 +258,6 @@ static inline void tick_dep_clear_signal(struct signal_struct *signal,
enum tick_dep_bits bit) { }
static inline void tick_nohz_full_kick_cpu(int cpu) { }
-static inline void tick_nohz_full_kick_all(void) { }
static inline void __tick_nohz_task_switch(void) { }
#endif