[PATCH v4 04/24] sched/core: Add user_tick as argument to scheduler_tick()

[Ricardo Neri]

Differentiate between user and kernel ticks so that the scheduler updates
the IPC class of the current task during the former.

Cc: Ben Segall <bsegall@xxxxxxxxxx>
Cc: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
Cc: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
Cc: Ionela Voinescu <ionela.voinescu@xxxxxxx>
Cc: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Cc: Len Brown <len.brown@xxxxxxxxx>
Cc: Lukasz Luba <lukasz.luba@xxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Perry Yuan <Perry.Yuan@xxxxxxx>
Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Tim C. Chen <tim.c.chen@xxxxxxxxx>
Cc: Valentin Schneider <vschneid@xxxxxxxxxx>
Cc: Zhao Liu <zhao1.liu@xxxxxxxxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: linux-pm@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@xxxxxxxxxxxxxxx>
---
Changes since v3:
 * None

Changes since v2:
 * Corrected error in the changeset description: the IPC class of the
   current task is updated at user tick. (Dietmar)

Changes since v1:
 * None
---
 include/linux/sched.h | 2 +-
 kernel/sched/core.c   | 2 +-
 kernel/time/timer.c   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9fdee040f450..0e1c38ad09c2 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -295,7 +295,7 @@ enum {
 	TASK_COMM_LEN = 16,
 };
 
-extern void scheduler_tick(void);
+extern void scheduler_tick(bool user_tick);
 
 #define	MAX_SCHEDULE_TIMEOUT		LONG_MAX
 
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 77b769c23186..6ac53f01d989 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5639,7 +5639,7 @@ static inline u64 cpu_resched_latency(struct rq *rq) { return 0; }
  * This function gets called by the timer code, with HZ frequency.
  * We call it with interrupts disabled.
  */
-void scheduler_tick(void)
+void scheduler_tick(bool user_tick)
 {
 	int cpu = smp_processor_id();
 	struct rq *rq = cpu_rq(cpu);
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 63a8ce7177dd..e15e24105891 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -2073,7 +2073,7 @@ void update_process_times(int user_tick)
 	if (in_irq())
 		irq_work_tick();
 #endif
-	scheduler_tick();
+	scheduler_tick(user_tick);
 	if (IS_ENABLED(CONFIG_POSIX_TIMERS))
 		run_posix_cpu_timers();
 }
-- 
2.25.1