hung_task: add method to reset detector (8b414521) · Commits · 戴 / test

arch/x86/kernel/pvclock.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -48,6 +48,7 @@ void pvclock_touch_watchdogs(void)
		touch_softlockup_watchdog_sync();
		clocksource_touch_watchdog();
		rcu_cpu_stall_reset();
		reset_hung_task_detector();
		}

		static atomic64_t last_value = ATOMIC64_INIT(0);

+8 −0

Original line number	Diff line number	Diff line
		@@ -285,6 +285,14 @@ static inline void lockup_detector_init(void)
		}
		#endif

		#ifdef CONFIG_DETECT_HUNG_TASK
		void reset_hung_task_detector(void);
		#else
		static inline void reset_hung_task_detector(void)
		{
		}
		#endif

		/* Attach to any functions which should be ignored in wchan output. */
		#define __sched __attribute__((__section__(".sched.text")))

+11 −0

Original line number	Diff line number	Diff line
		@@ -203,6 +203,14 @@ int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
		return ret;
		}

		static atomic_t reset_hung_task = ATOMIC_INIT(0);

		void reset_hung_task_detector(void)
		{
		atomic_set(&reset_hung_task, 1);
		}
		EXPORT_SYMBOL_GPL(reset_hung_task_detector);

		/*
		* kthread which checks for tasks stuck in D state
		*/
		@@ -216,6 +224,9 @@ static int watchdog(void *dummy)
		while (schedule_timeout_interruptible(timeout_jiffies(timeout)))
		timeout = sysctl_hung_task_timeout_secs;

		if (atomic_xchg(&reset_hung_task, 0))
		continue;

		check_hung_uninterruptible_tasks(timeout);
		}