linux-kernel - [PATCH 1/4] kmemleak: Enable task stacks scanning by default

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Date:	Fri, 26 Jun 2009 15:12:41 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	linux-kernel@...r.kernel.org
Cc:	Dave Jones <davej@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Sergey Senozhatsky <sergey.senozhatsky@...l.by>
Subject: [PATCH 1/4] kmemleak: Enable task stacks scanning by default

This is to reduce the number of false positives reported.

Signed-off-by: Catalin Marinas <catalin.marinas@....com>
---
 Documentation/kmemleak.txt |    8 ++++----
 mm/kmemleak.c              |    2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/Documentation/kmemleak.txt b/Documentation/kmemleak.txt
index f655308..9426e94 100644
--- a/Documentation/kmemleak.txt
+++ b/Documentation/kmemleak.txt
@@ -31,12 +31,12 @@ Memory scanning parameters can be modified at run-time by writing to the
 /sys/kernel/debug/kmemleak file. The following parameters are supported:
 
   off		- disable kmemleak (irreversible)
-  stack=on	- enable the task stacks scanning
+  stack=on	- enable the task stacks scanning (default)
   stack=off	- disable the tasks stacks scanning
-  scan=on	- start the automatic memory scanning thread
+  scan=on	- start the automatic memory scanning thread (default)
   scan=off	- stop the automatic memory scanning thread
-  scan=<secs>	- set the automatic memory scanning period in seconds (0
-		  to disable it)
+  scan=<secs>	- set the automatic memory scanning period in seconds
+		  (default 600, 0 to stop the automatic scanning)
 
 Kmemleak can also be disabled at boot-time by passing "kmemleak=off" on
 the kernel command line.
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 17096d1..a38418a 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -194,7 +194,7 @@ static unsigned long jiffies_min_age;
 /* delay between automatic memory scannings */
 static signed long jiffies_scan_wait;
 /* enables or disables the task stacks scanning */
-static int kmemleak_stack_scan;
+static int kmemleak_stack_scan = 1;
 /* mutex protecting the memory scanning */
 static DEFINE_MUTEX(scan_mutex);
 /* mutex protecting the access to the /sys/kernel/debug/kmemleak file */

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