The patch titled Subject: mm-use-stack_depot-for-recording-kmemleaks-backtrace-v3 has been added to the -mm mm-unstable branch. Its filename is mm-use-stack_depot-for-recording-kmemleaks-backtrace-v3.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-use-stack_depot-for-recording-kmemleaks-backtrace-v3.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Zhaoyang Huang <zhaoyang.huang@xxxxxxxxxx> Subject: mm-use-stack_depot-for-recording-kmemleaks-backtrace-v3 Date: Sun, 30 Oct 2022 11:42:34 +0800 changes of v2: fix bugs of stack_depot_init related issue changes of v3: have DEBUG_KMEMLEAK select STACK_DEPOT by default remove unuse functions Link: https://lkml.kernel.org/r/1667101354-4669-1-git-send-email-zhaoyang.huang@xxxxxxxxxx Signed-off-by: Zhaoyang Huang <zhaoyang.huang@xxxxxxxxxx> Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: ke.wang <ke.wang@xxxxxxxxxx> Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Cc: Zhaoyang Huang <huangzhaoyang@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- lib/Kconfig.debug | 1 + mm/kmemleak.c | 19 ++++++------------- 2 files changed, 7 insertions(+), 13 deletions(-) --- a/lib/Kconfig.debug~mm-use-stack_depot-for-recording-kmemleaks-backtrace-v3 +++ a/lib/Kconfig.debug @@ -726,6 +726,7 @@ config DEBUG_KMEMLEAK select STACKTRACE if STACKTRACE_SUPPORT select KALLSYMS select CRC32 + select STACKDEPOT help Say Y here if you want to enable the memory leak detector. The memory allocation/freeing is traced in a way --- a/mm/kmemleak.c~mm-use-stack_depot-for-recording-kmemleaks-backtrace-v3 +++ a/mm/kmemleak.c @@ -343,7 +343,7 @@ static bool unreferenced_object(struct k * print_unreferenced function must be called with the object->lock held. */ static void print_unreferenced(struct seq_file *seq, - struct kmemleak_object *object) + struct kmemleak_object *object) { int i; unsigned long *entries; @@ -352,10 +352,10 @@ static void print_unreferenced(struct se nr_entries = stack_depot_fetch(object->trace_handle, &entries); warn_or_seq_printf(seq, "unreferenced object 0x%08lx (size %zu):\n", - object->pointer, object->size); + object->pointer, object->size); warn_or_seq_printf(seq, " comm \"%s\", pid %d, jiffies %lu (age %d.%03ds)\n", - object->comm, object->pid, object->jiffies, - msecs_age / 1000, msecs_age % 1000); + object->comm, object->pid, object->jiffies, + msecs_age / 1000, msecs_age % 1000); hex_dump_object(seq, object); warn_or_seq_printf(seq, " backtrace:\n"); @@ -373,9 +373,9 @@ static void print_unreferenced(struct se static void dump_object_info(struct kmemleak_object *object) { pr_notice("Object 0x%08lx (size %zu):\n", - object->pointer, object->size); + object->pointer, object->size); pr_notice(" comm \"%s\", pid %d, jiffies %lu\n", - object->comm, object->pid, object->jiffies); + object->comm, object->pid, object->jiffies); pr_notice(" min_count = %d\n", object->min_count); pr_notice(" count = %d\n", object->count); pr_notice(" flags = 0x%x\n", object->flags); @@ -595,7 +595,6 @@ static struct kmemleak_object *find_and_ return object; } -#ifdef CONFIG_STACKDEPOT static noinline depot_stack_handle_t set_track_prepare(void) { depot_stack_handle_t trace_handle; @@ -609,12 +608,6 @@ static noinline depot_stack_handle_t set return trace_handle; } -#else -static inline depot_stack_handle_t set_track_prepare(void) -{ - return 0; -} -#endif /* * Create the metadata (struct kmemleak_object) corresponding to an allocated _ Patches currently in -mm which might be from zhaoyang.huang@xxxxxxxxxx are mm-use-stack_depot-for-recording-kmemleaks-backtrace.patch mm-use-stack_depot-for-recording-kmemleaks-backtrace-v3.patch