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-rw-r--r--include/linux/tick.h2
-rw-r--r--kernel/sched/core.c4
-rw-r--r--kernel/time/tick-sched.c2
3 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/tick.h b/include/linux/tick.h
index d290168335bc..e31e67623ea1 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
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 69f71335984f..9ad35005f1cb 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1398,7 +1398,8 @@ static void sched_ttwu_pending(void)
void scheduler_ipi(void)
{
- if (llist_empty(&this_rq()->wake_list) && !got_nohz_idle_kick())
+ if (llist_empty(&this_rq()->wake_list) && !got_nohz_idle_kick()
+ && !tick_nohz_full_cpu(smp_processor_id()))
return;
/*
@@ -1415,6 +1416,7 @@ void scheduler_ipi(void)
* somewhat pessimize the simple resched case.
*/
irq_enter();
+ tick_nohz_full_check();
sched_ttwu_pending();
/*
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 884a9f302a06..4d74a68b2c34 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -151,7 +151,7 @@ bool have_nohz_full_mask;
* Re-evaluate the need for the tick on the current CPU
* and restart it if necessary.
*/
-static void tick_nohz_full_check(void)
+void tick_nohz_full_check(void)
{
/*
* STUB for now, will be filled with the full tick stop/restart