On Thu, Mar 19, 2020 at 07:41:53PM -0700, Paul E. McKenney wrote: > On Thu, Mar 19, 2020 at 08:48:38PM -0400, Steven Rostedt wrote: > > On Thu, 19 Mar 2020 17:28:13 -0700 > > "Paul E. McKenney" <paulmck@xxxxxxxxxx> wrote: > > > > > Good point. If interrupts are disabled, it will need to use some > > > other mechanism. One approach is irqwork. Another is a timer. > > > > > > Suggestions? > > > > Ftrace and perf use irq_work, I would think that should work here too. > > Sounds good, will give it a go! And thank you for catching this! Since the the Tasks-RCU holdout thread is supposed to wake up periodically to scan holdout tasks anyway, can it not detect the end of the Trace-RCU grace period on its next wake up? Sorry if I missed something. thanks, - Joel
