[PATCH 12/14] kmemleak: Enable the building of the memory leak detector

Catalin Marinas
2009-04-24T16:46:07Z

This patch adds the Kconfig.debug and Makefile entries needed for
building kmemleak into the kernel.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
lib/Kconfig.debug | 22 ++++++++++++++++++++++
mm/Makefile | 1 +
2 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index c6e854f..6c9d21f 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -336,6 +336,28 @@ config SLUB_STATS
out which slabs are relevant to a particular load.
Try running: slabinfo -DA

+config DEBUG_KMEMLEAK
+ bool "Kernel memory leak detector"
+ default n
+ depends on EXPERIMENTAL && (X86 || ARM) && !MEMORY_HOTPLUG
+ select DEBUG_SLAB if SLAB
+ select SLUB_DEBUG if SLUB
+ select DEBUG_FS if SYSFS
+ select STACKTRACE if STACKTRACE_SUPPORT
+ select KALLSYMS
+ help
+ Say Y here if you want to enable the memory leak
+ detector. The memory allocation/freeing is traced in a way
+ similar to the Boehm's conservative garbage collector, the
+ difference being that the orphan objects are not freed but
+ only shown in /sys/kernel/debug/kmemleak. Enabling this
+ feature will introduce an overhead to memory
+ allocations. See Documentation/kmemleak.txt for more
+ details.
+
+ In order to access the kmemleak file, debugfs needs to be
+ mounted (usually at /sys/kernel/debug).
+
config DEBUG_PREEMPT
bool "Debug preemptible kernel"
depends on DEBUG_KERNEL && PREEMPT && (TRACE_IRQFLAGS_SUPPORT || PPC64)
diff --git a/mm/Makefile b/mm/Makefile
index ec73c68..cb84a02 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -38,3 +38,4 @@ obj-$(CONFIG_SMP) += allocpercpu.o
endif
obj-$(CONFIG_QUICKLIST) += quicklist.o
obj-$(CONFIG_CGROUP_MEM_RES_CTLR) += memcontrol.o page_cgroup.o
+obj-$(CONFIG_DEBUG_KMEMLEAK) += kmemleak.o