Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 8 Nov 2018 10:21:51 +0100 | From | Peter Zijlstra <> | Subject | Re: Question on comment header for for_each_domain() |
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On Wed, Nov 07, 2018 at 03:00:02PM -0800, Paul E. McKenney wrote: > Hello! > > The header comment for for_each_domain() talks about a call to > synchronize_sched() within detach_destroy_domains(), but I am not > seeing any such call. Because synchronize_sched() is now folded into > synchronize_rcu(), I have a patch that edits the comment, but it looks > like a larger change is needed. > > Or am I blind today?
I think you're quite right and that comment is a wee bit stale.
The sched domain tree is indeed protected by regular RCU (not RCU-sched as the comment seems to imply) and this is per destroy_sched_domains() using call_rcu().
And most (I didn't look at all) uses for the sched-domain tree do indeed employ rcu_read_lock().
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