linux-kernel - [PATCH] LOCKSTAT: Add usage info to Documentation/lockstat.txt

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Message-ID: <4B05BE7D.30500@am.sony.com>
Date:	Thu, 19 Nov 2009 13:54:05 -0800
From:	Frank Rowand <frank.rowand@...sony.com>
To:	peterz@...radead.org, mingo@...hat.com
CC:	tom.leiming@...il.com, linux-kernel@...r.kernel.org
Subject: [PATCH] LOCKSTAT: Add usage info to Documentation/lockstat.txt

Add usage info to Documentation/lockstat.txt

Signed-off-by: Frank Rowand <frank.rowand@...sony.com>

---
 Documentation/lockstat.txt |   12 	12 +	0 -	0 !
 1 files changed, 12 insertions(+)

Index: b/Documentation/lockstat.txt
===================================================================
--- 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.
 
+ - CONFIGURATION
+
+Lock statistics are enabled via CONFIG_LOCK_STATS.
+
  - 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

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