[merged mm-stable] mm-page_owner-add-debugfs-file-show_handles.patch removed from -mm tree

[merged mm-stable] mm-page_owner-add-debugfs-file-show_handles.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/page_owner: add debugfs file 'show_handles'
has been removed from the -mm tree.  Its filename was
     mm-page_owner-add-debugfs-file-show_handles.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Mauricio Faria de Oliveira <mfo@igalia.com>
Subject: mm/page_owner: add debugfs file 'show_handles'
Date: Wed, 1 Oct 2025 14:56:09 -0300

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>
---

 mm/page_owner.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/mm/page_owner.c~mm-page_owner-add-debugfs-file-show_handles
+++ a/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 *
 		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);
 
_

Patches currently in -mm which might be from mfo@igalia.com are