kmemleak: Enable task stacks scanning by default

This is to reduce the number of false positives reported.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/Documentation/kmemleak.txt b/Documentation/kmemleak.txt
index f655308064d765ffccbd1fcb8c5e301283edbf60..9426e94f291ac3f897ed2497aa6683c9276fd257 100644 (file)
--- 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 17096d1b59b27c725e238229463ad974d1e82c97..a38418a95d33fa425791e0fcee465778833b4cce 100644 (file)
--- 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 */