Commit 88092d0c authored by Paul E. McKenney's avatar Paul E. McKenney
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rcu-tasks: Add a grace-period start time for throttling and debug 



This commit adds a place to record the grace-period start in jiffies.
This will be used by later commits for debugging purposes and to throttle
IPIs early in the grace period.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 43766c3e

kernel/rcu/tasks.h

+2 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ struct rcu_tasks { 
	raw_spinlock_t cbs_lock;

	int gp_state;

	unsigned long gp_jiffies;

	unsigned long gp_start;

	struct task_struct *kthread_ptr;

	rcu_tasks_gp_func_t gp_func;

	pregp_func_t pregp_func;
@@ -200,6 +201,7 @@ static int __noreturn rcu_tasks_kthread(void *arg) 


		// Wait for one grace period.

		set_tasks_gp_state(rtp, RTGS_WAIT_GP);

		rtp->gp_start = jiffies;

		rtp->gp_func(rtp);



		/* Invoke the callbacks. */