On Tue, Nov 21, 2023 at 09:44:44AM -0500, Steven Rostedt wrote: > On Tue, 21 Nov 2023 15:36:47 +0100 > Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > > > Still utterly confused about what task-tracing rcu is and how it is > > different from preemptible rcu. > > Is this similar to synchronize_rcu_tasks()? As I understand that one (grace > period continues until all tasks have voluntarily scheduled or gone into > user space). But I'm a bit confused by synchronize_rcu_tasks_trace()? > > Note, that for syncronize_rcu_tasks() the critical sections must not call > schedule (although it is OK to be preempted). The synchronize_rcu_tasks() and synchronize_rcu_tasks_trace() functions are quite different, as noted elsewhere in this thread. Thanx, Paul
