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). -- Steve
