diff options
| author | Mauricio Faria de Oliveira <mfo@igalia.com> | 2025-10-01 20:56:10 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-11-17 04:27:59 +0300 |
| commit | 5513cfbcf4da97ba0476d63e7670fdfcde59580f (patch) | |
| tree | bd75a0ef90c3d5ed8d081bb70f980426671c96e1 | |
| parent | 3b52b9e31a860df97bb46e9f3bfdab9f36d5d893 (diff) | |
| download | linux-5513cfbcf4da97ba0476d63e7670fdfcde59580f.tar.xz | |
mm/page_owner: add debugfs file 'show_stacks_handles'
Add the file 'show_stacks_handles' to show just stack traces and their
handles, in order to resolve stack traces and handles (i.e., to identify
the stack traces for handles in previous reads from 'show_handles').
All stacks/handles must show up, regardless of their number of pages, that
might have become zero or no longer make 'count_threshold', but made it in
previous reads from 'show_handles' -- and need to be resolved later.
P.S.: now, print the extra newline independently of the number of pages.
Link: https://lkml.kernel.org/r/20251001175611.575861-5-mfo@igalia.com
Signed-off-by: Mauricio Faria de Oliveira <mfo@igalia.com>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
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 | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/page_owner.c b/mm/page_owner.c index fe788f07b578..9c67bb8fb1d9 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -916,7 +916,8 @@ static int stack_print(struct seq_file *m, void *v) nr_base_pages = refcount_read(&stack_record->count) - 1; - if (nr_base_pages < 1 || nr_base_pages < page_owner_pages_threshold) + if (ctx->flags & STACK_PRINT_FLAG_PAGES && + (nr_base_pages < 1 || nr_base_pages < page_owner_pages_threshold)) return 0; if (ctx->flags & STACK_PRINT_FLAG_STACK) { @@ -928,7 +929,8 @@ static int stack_print(struct seq_file *m, void *v) 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); + seq_printf(m, "nr_base_pages: %d\n", nr_base_pages); + seq_putc(m, '\n'); return 0; } @@ -1002,6 +1004,10 @@ static int __init pageowner_init(void) (void *)(STACK_PRINT_FLAG_HANDLE | STACK_PRINT_FLAG_PAGES), &page_owner_stack_operations); + debugfs_create_file("show_stacks_handles", 0400, dir, + (void *)(STACK_PRINT_FLAG_STACK | + STACK_PRINT_FLAG_HANDLE), + &page_owner_stack_operations); debugfs_create_file("count_threshold", 0600, dir, NULL, &proc_page_owner_threshold); |