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authorPaul E. McKenney <paul.mckenney@linaro.org>2012-05-05 19:10:35 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2012-06-06 20:43:27 -0700
commitfd4b352687fd8604d49c190c4c9ea9e369fd42d5 (patch)
tree1e20de9090f7d74eef642ac263dd71da0b494d7d /include/trace
parent8f5af6f1f2d09fe5eac86a5dc1731a5917c1503a (diff)
downloadop-kernel-dev-fd4b352687fd8604d49c190c4c9ea9e369fd42d5.zip
op-kernel-dev-fd4b352687fd8604d49c190c4c9ea9e369fd42d5.tar.gz
rcu: Update RCU_FAST_NO_HZ tracing for lazy callbacks
In the current code, a short dyntick-idle interval (where there is at least one non-lazy callback on the CPU) and a long dyntick-idle interval (where there are only lazy callbacks on the CPU) are traced identically, which can be less than helpful. This commit therefore emits different event traces in these two cases. Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Tested-by: Heiko Carstens <heiko.carstens@de.ibm.com> Tested-by: Pascal Chapperon <pascal.chapperon@wanadoo.fr>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/rcu.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h
index 1480900..d274734 100644
--- a/include/trace/events/rcu.h
+++ b/include/trace/events/rcu.h
@@ -289,6 +289,7 @@ TRACE_EVENT(rcu_dyntick,
* "In holdoff": Nothing to do, holding off after unsuccessful attempt.
* "Begin holdoff": Attempt failed, don't retry until next jiffy.
* "Dyntick with callbacks": Entering dyntick-idle despite callbacks.
+ * "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks.
* "More callbacks": Still more callbacks, try again to clear them out.
* "Callbacks drained": All callbacks processed, off to dyntick idle!
* "Timer": Timer fired to cause CPU to continue processing callbacks.
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