diff options
| author | Mauricio Faria de Oliveira <mfo@igalia.com> | 2025-10-01 20:56:09 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-11-17 04:27:58 +0300 |
| commit | 3b52b9e31a860df97bb46e9f3bfdab9f36d5d893 (patch) | |
| tree | 06102307d6c1fd93c7a4a745a0005e0fb86e1a5f | |
| parent | 5c8ca473d5cb600f906820933cb0a8df44105045 (diff) | |
| download | linux-3b52b9e31a860df97bb46e9f3bfdab9f36d5d893.tar.xz | |
mm/page_owner: add debugfs file 'show_handles'
Add the flag STACK_PRINT_FLAG_HANDLE to print a stack's handle number from
stackdepot, and add the file 'show_handles' to show just handles and their
number of pages.
This is similar to 'show_stacks', with handles instead of stack traces.
Link: https://lkml.kernel.org/r/20251001175611.575861-4-mfo@igalia.com
Signed-off-by: Mauricio Faria de Oliveira <mfo@igalia.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/page_owner.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/page_owner.c b/mm/page_owner.c index 2f6f99d60ba7..fe788f07b578 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -47,6 +47,7 @@ static DEFINE_SPINLOCK(stack_list_lock); #define STACK_PRINT_FLAG_STACK 0x1 #define STACK_PRINT_FLAG_PAGES 0x2 +#define STACK_PRINT_FLAG_HANDLE 0x4 struct stack_print_ctx { struct stack *stack; @@ -924,6 +925,8 @@ static int stack_print(struct seq_file *m, void *v) for (i = 0; i < nr_entries; i++) seq_printf(m, " %pS\n", (void *)entries[i]); } + if (ctx->flags & STACK_PRINT_FLAG_HANDLE) + seq_printf(m, "handle: %d\n", stack_record->handle.handle); if (ctx->flags & STACK_PRINT_FLAG_PAGES) seq_printf(m, "nr_base_pages: %d\n\n", nr_base_pages); @@ -995,6 +998,10 @@ static int __init pageowner_init(void) (void *)(STACK_PRINT_FLAG_STACK | STACK_PRINT_FLAG_PAGES), &page_owner_stack_operations); + debugfs_create_file("show_handles", 0400, dir, + (void *)(STACK_PRINT_FLAG_HANDLE | + STACK_PRINT_FLAG_PAGES), + &page_owner_stack_operations); debugfs_create_file("count_threshold", 0600, dir, NULL, &proc_page_owner_threshold); |