Messages in this thread | | | Date | Wed, 5 Feb 2020 08:14:09 -0500 | From | Steven Rostedt <> | Subject | Re: [PATCH] tracing: Annotate ftrace_graph_hash pointer with __rcu |
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On Wed, 5 Feb 2020 05:11:10 -0800 "Paul E. McKenney" <paulmck@kernel.org> wrote:
> I strongly recommend a comment stating why disabling preemption prevents > ftrace_graph_hash from going away. I see the synchronize_rcu() after > the rcu_assign_pointer() in ftrace_graph_release(), but I don't see > anything that waits on CPUs that RCU is not watching. > > Of course, event tracing -makes- RCU watch when needed, but if that > was set up, then lockdep would not have complained. > > So what am I missing?
Keep looking in your INBOX and look at the patch I asked you to ack or complain about ;-)
-- Steve
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