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page-types: add standard GPL license header
[safe/jmp/linux-2.6]
/
Documentation
/
lockstat.txt
diff --git
a/Documentation/lockstat.txt
b/Documentation/lockstat.txt
index
9cb9138
..
65f4c79
100644
(file)
--- a/
Documentation/lockstat.txt
+++ b/
Documentation/lockstat.txt
@@
-62,8
+62,20
@@
applicable).
It also tracks 4 contention points per class. A contention point is a call site
that had to wait on lock acquisition.
It also tracks 4 contention points per class. A contention point is a call site
that had to wait on lock acquisition.
+ - CONFIGURATION
+
+Lock statistics are enabled via CONFIG_LOCK_STATS.
+
- USAGE
- USAGE
+Enable collection of statistics:
+
+# echo 1 >/proc/sys/kernel/lock_stat
+
+Disable collection of statistics:
+
+# echo 0 >/proc/sys/kernel/lock_stat
+
Look at the current lock statistics:
( line numbers not part of actual output, done for clarity in the explanation
Look at the current lock statistics:
( line numbers not part of actual output, done for clarity in the explanation