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-rw-r--r--kernel/time/tick-sched.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index d0ed1905a85..12a900dbb81 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -232,6 +232,26 @@ void tick_nohz_full_kick_all(void)
preempt_enable();
}
+/*
+ * Re-evaluate the need for the tick as we switch the current task.
+ * It might need the tick due to per task/process properties:
+ * perf events, posix cpu timers, ...
+ */
+void tick_nohz_task_switch(struct task_struct *tsk)
+{
+ unsigned long flags;
+
+ if (!tick_nohz_full_cpu(smp_processor_id()))
+ return;
+
+ local_irq_save(flags);
+
+ if (tick_nohz_tick_stopped() && !can_stop_full_tick())
+ tick_nohz_full_kick();
+
+ local_irq_restore(flags);
+}
+
int tick_nohz_full_cpu(int cpu)
{
if (!have_nohz_full_mask)