Commit b2db9ef2 authored by Zhaoyang Huang's avatar Zhaoyang Huang Committed by Andrew Morton
Browse files

mm: move KMEMLEAK's Kconfig items from lib to mm 

Have the kmemleak's source code and Kconfig items be in the same directory.

Link: https://lkml.kernel.org/r/1674091345-14799-1-git-send-email-zhaoyang.huang@unisoc.com


Signed-off-by: default avatarZhaoyang Huang <zhaoyang.huang@unisoc.com>
Acked-by: default avatarMike Rapoport (IBM) <rppt@kernel.org>
Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
Cc: ke.wang <ke.wang@unisoc.com>
Cc: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent f4c978b6

lib/Kconfig.debug

+0 −71
Original line number Diff line number Diff line
@@ -743,77 +743,6 @@ config SHRINKER_DEBUG 
	  visibility into the kernel memory shrinkers subsystem.

	  Disable it to avoid an extra memory footprint.



config HAVE_DEBUG_KMEMLEAK

	bool



config DEBUG_KMEMLEAK

	bool "Kernel memory leak detector"

	depends on DEBUG_KERNEL && HAVE_DEBUG_KMEMLEAK

	select DEBUG_FS

	select STACKTRACE if STACKTRACE_SUPPORT

	select KALLSYMS

	select CRC32

	select STACKDEPOT

	select STACKDEPOT_ALWAYS_INIT if !DEBUG_KMEMLEAK_DEFAULT_OFF

	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/dev-tools/kmemleak.rst for more

	  details.



	  Enabling DEBUG_SLAB or SLUB_DEBUG may increase the chances

	  of finding leaks due to the slab objects poisoning.



	  In order to access the kmemleak file, debugfs needs to be

	  mounted (usually at /sys/kernel/debug).



config DEBUG_KMEMLEAK_MEM_POOL_SIZE

	int "Kmemleak memory pool size"

	depends on DEBUG_KMEMLEAK

	range 200 1000000

	default 16000

	help

	  Kmemleak must track all the memory allocations to avoid

	  reporting false positives. Since memory may be allocated or

	  freed before kmemleak is fully initialised, use a static pool

	  of metadata objects to track such callbacks. After kmemleak is

	  fully initialised, this memory pool acts as an emergency one

	  if slab allocations fail.



config DEBUG_KMEMLEAK_TEST

	tristate "Simple test for the kernel memory leak detector"

	depends on DEBUG_KMEMLEAK && m

	help

	  This option enables a module that explicitly leaks memory.



	  If unsure, say N.



config DEBUG_KMEMLEAK_DEFAULT_OFF

	bool "Default kmemleak to off"

	depends on DEBUG_KMEMLEAK

	help

	  Say Y here to disable kmemleak by default. It can then be enabled

	  on the command line via kmemleak=on.



config DEBUG_KMEMLEAK_AUTO_SCAN

	bool "Enable kmemleak auto scan thread on boot up"

	default y

	depends on DEBUG_KMEMLEAK

	help

	  Depending on the cpu, kmemleak scan may be cpu intensive and can

	  stall user tasks at times. This option enables/disables automatic

	  kmemleak scan at boot up.



	  Say N here to disable kmemleak auto scan thread to stop automatic

	  scanning. Disabling this option disables automatic reporting of

	  memory leaks.



	  If unsure, say Y.



config DEBUG_STACK_USAGE

	bool "Stack utilization instrumentation"

	depends on DEBUG_KERNEL && !IA64

mm/Kconfig.debug

+72 −0
Original line number Diff line number Diff line
@@ -207,3 +207,75 @@ config PTDUMP_DEBUGFS 
	  kernel.



	  If in doubt, say N.



config HAVE_DEBUG_KMEMLEAK

	bool



config DEBUG_KMEMLEAK

	bool "Kernel memory leak detector"

	depends on DEBUG_KERNEL && HAVE_DEBUG_KMEMLEAK

	select DEBUG_FS

	select STACKTRACE if STACKTRACE_SUPPORT

	select KALLSYMS

	select CRC32

	select STACKDEPOT

	select STACKDEPOT_ALWAYS_INIT if !DEBUG_KMEMLEAK_DEFAULT_OFF

	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/dev-tools/kmemleak.rst for more

	  details.



	  Enabling DEBUG_SLAB or SLUB_DEBUG may increase the chances

	  of finding leaks due to the slab objects poisoning.



	  In order to access the kmemleak file, debugfs needs to be

	  mounted (usually at /sys/kernel/debug).



config DEBUG_KMEMLEAK_MEM_POOL_SIZE

	int "Kmemleak memory pool size"

	depends on DEBUG_KMEMLEAK

	range 200 1000000

	default 16000

	help

	  Kmemleak must track all the memory allocations to avoid

	  reporting false positives. Since memory may be allocated or

	  freed before kmemleak is fully initialised, use a static pool

	  of metadata objects to track such callbacks. After kmemleak is

	  fully initialised, this memory pool acts as an emergency one

	  if slab allocations fail.



config DEBUG_KMEMLEAK_TEST

	tristate "Simple test for the kernel memory leak detector"

	depends on DEBUG_KMEMLEAK && m

	help

	  This option enables a module that explicitly leaks memory.



	  If unsure, say N.



config DEBUG_KMEMLEAK_DEFAULT_OFF

	bool "Default kmemleak to off"

	depends on DEBUG_KMEMLEAK

	help

	  Say Y here to disable kmemleak by default. It can then be enabled

	  on the command line via kmemleak=on.



config DEBUG_KMEMLEAK_AUTO_SCAN

	bool "Enable kmemleak auto scan thread on boot up"

	default y

	depends on DEBUG_KMEMLEAK

	help

	  Depending on the cpu, kmemleak scan may be cpu intensive and can

	  stall user tasks at times. This option enables/disables automatic

	  kmemleak scan at boot up.



	  Say N here to disable kmemleak auto scan thread to stop automatic

	  scanning. Disabling this option disables automatic reporting of

	  memory leaks.



	  If unsure, say Y.