Date: Wed, 23 Feb 2011 13:24:34 -0600 (CST)
From: Christoph Lameter <cl@linux.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
cc: Steven Rostedt <rostedt@goodmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
        Frederic Weisbecker <fweisbec@gmail.com>, linux-kernel@vger.kernel.org,
        mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com,
        akpm@linux-foundation.org, josh@joshtriplett.org, niv@us.ibm.com,
        tglx@linutronix.de, peterz@infradead.org, Valdis.Kletnieks@vt.edu,
        dhowells@redhat.com, eric.dumazet@gmail.com, darren@dvhart.com,
        "Paul E. McKenney" <paul.mckenney@linaro.org>
Subject: Re: [PATCH RFC tip/core/rcu 11/11] rcu: move TREE_RCU from softirq
 to kthread
In-Reply-To: <20110223191658.GV2163@linux.vnet.ibm.com>
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On Wed, 23 Feb 2011, Paul E. McKenney wrote:

> Reschedules can happen in this case due to CPU hotplug events.  :-(

Lockout cpu hotplug instead of disabling interrupts? Systems that support
cpu hotplug in hardware are rare and so the cpu hotplug locking may be
become noop.


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