diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index dac7466de5f3..178687d9e289 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -612,6 +612,22 @@ extern void __raise_softirq_irqoff(unsigned int nr);
 extern void raise_softirq_irqoff(unsigned int nr);
 extern void raise_softirq(unsigned int nr);
 
+#ifdef CONFIG_PREEMPT_RT
+extern void raise_timer_softirq(void);
+extern void raise_hrtimer_softirq(void);
+
+#else
+static inline void raise_timer_softirq(void)
+{
+	raise_softirq(TIMER_SOFTIRQ);
+}
+
+static inline void raise_hrtimer_softirq(void)
+{
+	raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+}
+#endif
+
 DECLARE_PER_CPU(struct task_struct *, ksoftirqd);
 
 static inline struct task_struct *this_cpu_ksoftirqd(void)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index f24d80cf20bd..307858228485 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -630,6 +630,29 @@ static inline void tick_irq_exit(void)
 #endif
 }
 
+#ifdef CONFIG_PREEMPT_RT
+static DEFINE_PER_CPU(struct task_struct *, timersd);
+static DEFINE_PER_CPU(unsigned long, pending_timer_softirq);
+
+static unsigned int local_pending_timers(void)
+{
+        return __this_cpu_read(pending_timer_softirq);
+}
+
+static void wake_timersd(void)
+{
+        struct task_struct *tsk = __this_cpu_read(timersd);
+
+        if (tsk)
+                wake_up_process(tsk);
+}
+
+#else
+
+static inline void wake_timersd(void) { }
+
+#endif
+
 static inline void __irq_exit_rcu(void)
 {
 #ifndef __ARCH_IRQ_EXIT_IRQS_DISABLED
@@ -639,8 +662,13 @@ static inline void __irq_exit_rcu(void)
 #endif
 	account_hardirq_exit(current);
 	preempt_count_sub(HARDIRQ_OFFSET);
-	if (!in_interrupt() && local_softirq_pending())
-		invoke_softirq();
+	if (!in_interrupt()) {
+		if (local_softirq_pending())
+			invoke_softirq();
+
+		if (IS_ENABLED(CONFIG_PREEMPT_RT) && local_pending_timers())
+			wake_timersd();
+	}
 
 	tick_irq_exit();
 }
@@ -974,12 +1002,70 @@ static struct smp_hotplug_thread softirq_threads = {
 	.thread_comm		= "ksoftirqd/%u",
 };
 
+#ifdef CONFIG_PREEMPT_RT
+static void timersd_setup(unsigned int cpu)
+{
+        sched_set_fifo_low(current);
+}
+
+static int timersd_should_run(unsigned int cpu)
+{
+        return local_pending_timers();
+}
+
+static void run_timersd(unsigned int cpu)
+{
+	unsigned int timer_si;
+
+	ksoftirqd_run_begin();
+
+	timer_si = local_pending_timers();
+	__this_cpu_write(pending_timer_softirq, 0);
+	or_softirq_pending(timer_si);
+
+	__do_softirq();
+
+	ksoftirqd_run_end();
+}
+
+static void raise_ktimers_thread(unsigned int nr)
+{
+	trace_softirq_raise(nr);
+	__this_cpu_or(pending_timer_softirq, 1 << nr);
+}
+
+void raise_hrtimer_softirq(void)
+{
+	raise_ktimers_thread(HRTIMER_SOFTIRQ);
+}
+
+void raise_timer_softirq(void)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	raise_ktimers_thread(TIMER_SOFTIRQ);
+	wake_timersd();
+	local_irq_restore(flags);
+}
+
+static struct smp_hotplug_thread timer_threads = {
+        .store                  = &timersd,
+        .setup                  = timersd_setup,
+        .thread_should_run      = timersd_should_run,
+        .thread_fn              = run_timersd,
+        .thread_comm            = "ktimers/%u",
+};
+#endif
+
 static __init int spawn_ksoftirqd(void)
 {
 	cpuhp_setup_state_nocalls(CPUHP_SOFTIRQ_DEAD, "softirq:dead", NULL,
 				  takeover_tasklets);
 	BUG_ON(smpboot_register_percpu_thread(&softirq_threads));
-
+#ifdef CONFIG_PREEMPT_RT
+	BUG_ON(smpboot_register_percpu_thread(&timer_threads));
+#endif
 	return 0;
 }
 early_initcall(spawn_ksoftirqd);
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 359ffa38a73e..bcddc8c4415e 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -1873,7 +1873,7 @@ retry:
 	if (!ktime_before(now, cpu_base->softirq_expires_next)) {
 		cpu_base->softirq_expires_next = KTIME_MAX;
 		cpu_base->softirq_activated = 1;
-		raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+		raise_hrtimer_softirq();
 	}
 
 	__hrtimer_run_queues(cpu_base, now, flags, HRTIMER_ACTIVE_HARD);
@@ -1986,7 +1986,7 @@ void hrtimer_run_queues(void)
 	if (!ktime_before(now, cpu_base->softirq_expires_next)) {
 		cpu_base->softirq_expires_next = KTIME_MAX;
 		cpu_base->softirq_activated = 1;
-		raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+		raise_hrtimer_softirq();
 	}
 
 	__hrtimer_run_queues(cpu_base, now, flags, HRTIMER_ACTIVE_HARD);
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 352b161113cd..e0fb895928ab 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -2070,7 +2070,7 @@ static void run_local_timers(void)
 		if (time_before(jiffies, base->next_expiry))
 			return;
 	}
-	raise_softirq(TIMER_SOFTIRQ);
+	raise_timer_softirq();
 }
 
 /*