From: Paul E. McKenney <paul.mckenney@linaro.org>
Date: Fri, 17 Jun 2011 22:53:19 +0000 (-0700)
Subject: rcu: Add event-tracing for RCU callback invocation
X-Git-Tag: v3.2-rc1~165^2^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=29c00b4a1d9e277786120032aa8364631820d863;p=pandora-kernel.git

rcu: Add event-tracing for RCU callback invocation

There was recently some controversy about the overhead of invoking RCU
callbacks.  Add TRACE_EVENT()s to obtain fine-grained timings for the
start and stop of a batch of callbacks and also for each callback invoked.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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