Messages in this thread Patch in this message | | | Subject | [PATCH 13/15] kmemleak: Keep the __init functions after initialization | From | Catalin Marinas <> | Date | Wed, 10 Dec 2008 18:28:06 +0000 |
| |
This patch adds the CONFIG_DEBUG_KEEP_INIT option which preserves the .init.* sections after initialization. Memory leaks happening during this phase can be more easily tracked.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> --- include/linux/init.h | 6 ++++++ lib/Kconfig.debug | 12 ++++++++++++ 2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/include/linux/init.h b/include/linux/init.h index 68cb026..41321ad 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -40,9 +40,15 @@ /* These are for everybody (although not all archs will actually discard it in modules) */ +#ifdef CONFIG_DEBUG_KEEP_INIT +#define __init +#define __initdata +#define __initconst +#else #define __init __section(.init.text) __cold notrace #define __initdata __section(.init.data) #define __initconst __section(.init.rodata) +#endif #define __exitdata __section(.exit.data) #define __exit_call __used __section(.exitcall.exit) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 1e59827..72cde77 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -313,6 +313,18 @@ config DEBUG_MEMLEAK In order to access the memleak file, debugfs needs to be mounted (usually at /sys/kernel/debug). +config DEBUG_KEEP_INIT + bool "Do not free the __init code/data" + default n + depends on DEBUG_MEMLEAK + help + This option moves the __init code/data out of the + .init.text/.init.data sections. It is useful for identifying + memory leaks happening during the kernel or modules + initialization. + + If unsure, say N. + config DEBUG_PREEMPT bool "Debug preemptible kernel" depends on DEBUG_KERNEL && PREEMPT && (TRACE_IRQFLAGS_SUPPORT || PPC64)
| |