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Date: Fri, 4 Oct 2013 13:44:42 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
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        Ingo Molnar <mingo@kernel.org>, Andrea Arcangeli <aarcange@redhat.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Steven Rostedt <rostedt@goodmis.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] rcu: Create rcu_sync infrastructure
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On Fri, Oct 04, 2013 at 01:15:13PM +0200, Oleg Nesterov wrote:
> > What's exclusive to mean? One writer at a time?
> 
> Yes,

I'm not entirely sure what the advantage is of having that logic in this
primitive. Shouldn't that be something the user of this rcu_sync stuff
does (or not) depending on its needs.