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Date: Sun, 14 Dec 2014 12:21:36 -0500
From: Steven Rostedt <rostedt@goodmis.org>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: linux-kernel@vger.kernel.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Ingo Molnar <mingo@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: Re: [PATCH 1/3] tracepoints: Do not use call_rcu_sched() before
 early_initcall()
Message-ID: <20141214122136.1664e104@gandalf.local.home>
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On Sun, 14 Dec 2014 12:14:57 -0500
Steven Rostedt <rostedt@goodmis.org> wrote:

> If IRQ setup, or other core pieces of code can use this, then I would
> agree that rcu should be changed. But until then, I rather not add
> another conditional to the core RCU code.

Also, call_rcu*() is called from several hot paths. This location is
not a hot path, and actually, it is in fact rather slow. That's another
reason not to add the logic into the RCU code if just adding it to
tracepoints is sufficient.

-- Steve