On Thu, May 07, 2026 at 10:44:39AM -0700, Joe Perches wrote:
> On Thu, 2026-05-07 at 10:09 -0700, Paul E. McKenney wrote:
> > It turns out that there are BPF use cases that rely on nesting RCU
> > Tasks Trace readers. These use cases are well-served by the old
> > rcu_read_lock_trace() and rcu_read_unlock_trace() functions that maintain
> > a nesting counter in the task_struct structure. But these use cases incur
> > a performance penalty when using the shiny new rcu_read_lock_tasks_trace()
> > and rcu_read_unlock_tasks_trace() functions, which nest in the same way
> > that SRCU does.
> >
> > This means that rcu_read_lock_trace() and rcu_read_unlock_trace()
> > will be with us for some time. Therefore, remove the checkpatch.pl
> > deprecation.
>
> Fine by me.
> Perhaps combining patches 3 and 4 would be more intelligible.
Very good, I will merge them on my next rebase.
Thanx, Paul
