On Sun, Jan 01, 2023 at 09:41:57AM +0000, Zhang, Qiang1 wrote: > > > >On Sat, Dec 31, 2022 at 07:25:08PM +0100, Frederic Weisbecker wrote: > > Yes, and I have a question, we forcing the tick dependency because the expedited grace period > is not end for the first time, this means that it is not to set the tick dependency every time. > if we set the tick dependency in rcu_exp_handler(), does this mean that every time the expedited > grace period starts the tick dependency will be set unconditionally ? > > Thoughts ? Only if rcu_exp_handler() fails to report a quiescent state. Then it means we must poll on the CPU looking for a future one. In fact the tick dependency should be set when rdp->cpu_no_qs.b.exp is set to true and cleared when rdp->cpu_no_qs.b.exp is set to false. Thanks. > > Thanks > Zqiang > > > > > Thanx, Paul
