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authorCatalin Marinas <catalin.marinas@arm.com>2009-06-26 16:38:27 (GMT)
committerCatalin Marinas <catalin.marinas@arm.com>2009-06-26 16:38:27 (GMT)
commit4698c1f2bbe44ce852ef1a6716973c1f5401a4c4 (patch)
tree9ca3be2353d3757e2926689351eff2bb09aaf6f7 /Documentation/kmemleak.txt
parentbab4a34afc301fdb81b6ea0e3098d96fc356e03a (diff)
kmemleak: Do not trigger a scan when reading the debug/kmemleak file
Since there is a kernel thread for automatically scanning the memory, it makes sense for the debug/kmemleak file to only show its findings. This patch also adds support for "echo scan > debug/kmemleak" to trigger an intermediate memory scan and eliminates the kmemleak_mutex (scan_mutex covers all the cases now). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation/kmemleak.txt')
-rw-r--r--Documentation/kmemleak.txt9
1 files changed, 7 insertions, 2 deletions
diff --git a/Documentation/kmemleak.txt b/Documentation/kmemleak.txt
index c06f7ba..8906803 100644
--- a/Documentation/kmemleak.txt
+++ b/Documentation/kmemleak.txt
@@ -17,12 +17,16 @@ Usage
CONFIG_DEBUG_KMEMLEAK in "Kernel hacking" has to be enabled. A kernel
thread scans the memory every 10 minutes (by default) and prints the
-number of new unreferenced objects found. To trigger an intermediate
-scan and display the details of all the possible memory leaks:
+number of new unreferenced objects found. To display the details of all
+the possible memory leaks:
# mount -t debugfs nodev /sys/kernel/debug/
# cat /sys/kernel/debug/kmemleak
+To trigger an intermediate memory scan:
+
+ # echo scan > /sys/kernel/debug/kmemleak
+
Note that the orphan objects are listed in the order they were allocated
and one object at the beginning of the list may cause other subsequent
objects to be reported as orphan.
@@ -37,6 +41,7 @@ Memory scanning parameters can be modified at run-time by writing to the
scan=off - stop the automatic memory scanning thread
scan=<secs> - set the automatic memory scanning period in seconds
(default 600, 0 to stop the automatic scanning)
+ scan - trigger a memory scan
Kmemleak can also be disabled at boot-time by passing "kmemleak=off" on
the kernel command line.

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