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authorPaul E. McKenney <paul.mckenney@linaro.org>2011-06-15 23:07:55 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-09-28 21:36:35 -0700
commitd5988af53102f3b73e5e0788be024ccfa51869de (patch)
tree6d99aa95f57b06d8bd88c412c51d624321fafcfd /Documentation/RCU
parent1eb521210a8c9823038abe4ddfe8c69e713ec17d (diff)
downloadlinux-d5988af53102f3b73e5e0788be024ccfa51869de.tar.gz
rcu: Update documentation to flag RCU_BOOST trace information
Call out the RCU_TRACE information that is provided only in kernels built with RCU_BOOST. Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'Documentation/RCU')
-rw-r--r--Documentation/RCU/trace.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt
index 8173cec473a..a67af0a39de 100644
--- a/Documentation/RCU/trace.txt
+++ b/Documentation/RCU/trace.txt
@@ -184,10 +184,14 @@ o "kt" is the per-CPU kernel-thread state. The digit preceding
The number after the final slash is the CPU that the kthread
is actually running on.
+ This field is displayed only for CONFIG_RCU_BOOST kernels.
+
o "ktl" is the low-order 16 bits (in hexadecimal) of the count of
the number of times that this CPU's per-CPU kthread has gone
through its loop servicing invoke_rcu_cpu_kthread() requests.
+ This field is displayed only for CONFIG_RCU_BOOST kernels.
+
o "b" is the batch limit for this CPU. If more than this number
of RCU callbacks is ready to invoke, then the remainder will
be deferred.