Commit cd23ac8d authored May 24, 2018 by Steven Rostedt (VMware) Committed by Paul E. McKenney Jul 12, 2018

rcu: Add comment to the last sleep in the rcu tasks loop

At the end of rcu_tasks_kthread() there's a lonely
schedule_timeout_uninterruptible() call with no apparent rationale for
its existence. But there is. It is to keep the thread from going into
a tight loop if there's some anomaly. That really needs a comment.

Link: http://lkml.kernel.org/r/20180524223839.GU3803@linux.vnet.ibm.com

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

parent c03be752

kernel/rcu/update.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -814,6 +814,7 @@ static int __noreturn rcu_tasks_kthread(void *arg)
		list = next;
		cond_resched();
		}
		/* Paranoid sleep to keep this from entering a tight loop */
		schedule_timeout_uninterruptible(HZ/10);
		}
		}