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Date:	Mon, 4 Aug 2014 21:32:58 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
	rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
	dvhart@...ux.intel.com, fweisbec@...il.com, bobby.prani@...il.com
Subject: Re: [PATCH v3 tip/core/rcu 1/9] rcu: Add call_rcu_tasks()

On 08/04, Paul E. McKenney wrote:
>
> OK, so I checked out my earlier concern about the group leader going away.
> It looks like the group leader now sticks around until all threads in
> the group have exited, which is a nice change from the behavior I was
> (perhaps incorrectly) recalling!

Ah, I didn't know you were worried about a zombie leader ;)

Yes, this case was always fine. Ignoring the fact while_each_thread() was
always buggy ;) Fortunately for_each_thread() should be fine.

Oleg.

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