Re: [PATCH v3 tip/core/rcu 3/9] rcu: Add synchronous grace-period waiting for RCU-tasks

Steven Rostedt
2014-08-08T16:49:39Z

On Fri, 8 Aug 2014 09:39:05 -0700
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com> wrote:

> Unless this is done in idle, at which point RCU-sched is studiously
> ignoring any preempt_disable() sections.

ftrace doesn't use synchronize_sched() today because of this. It
instead just does a "schedule_on_each_cpu()" and waits for that to
return before going further.

-- Steve