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Author SHA1 Message Date
Paul E. McKenney e99033c5c1 rcu: Put names into TINY_RCU structures under RCU_TRACE 
In order to allow event tracing to distinguish between flavors of
RCU, we need those names in the relevant RCU data structures.  TINY_RCU
has avoided them for memory-footprint reasons, so add them only if
CONFIG_RCU_TRACE=y.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
 2011-09-28 21:38:14 -07:00
Paul E. McKenney 29c00b4a1d 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>
 2011-09-28 21:38:12 -07:00