+ tools-mm-page_owner_sort-show-available-sort-keys-in-usage-text.patch added to mm-new branch

+ tools-mm-page_owner_sort-show-available-sort-keys-in-usage-text.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: tools/mm/page_owner_sort: show available sort keys in usage text
has been added to the -mm mm-new branch.  Its filename is
     tools-mm-page_owner_sort-show-available-sort-keys-in-usage-text.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/tools-mm-page_owner_sort-show-available-sort-keys-in-usage-text.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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and is updated there most days

------------------------------------------------------
From: Ye Liu <liuye@kylinos.cn>
Subject: tools/mm/page_owner_sort: show available sort keys in usage text
Date: Wed, 19 Aug 2026 10:16:11 +0800

The --sort option accepts abbreviated or complete key names, but the usage
text never listed them.  Users had to read the source or the documentation
to discover valid keys.

List all available keys (full form and abbreviation) with a brief
description and examples directly in the --sort help section.

Link: https://lore.kernel.org/20260819021611.2910835-4-ye.liu@linux.dev
Signed-off-by: Ye Liu <liuye@kylinos.cn>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Yichong Chen <chenyichong@uniontech.com>
Cc: Liu Jing <liujing@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/mm/page_owner_sort.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/tools/mm/page_owner_sort.c~tools-mm-page_owner_sort-show-available-sort-keys-in-usage-text
+++ a/tools/mm/page_owner_sort.c
@@ -772,6 +772,15 @@ static void usage(void)
 		"\t\t\targument in the form of a comma-separated list with some\n"
 		"\t\t\tcommon fields predefined (pid, tgid, comm, stacktrace, allocator, module)\n"
 		"--sort <order>\t\tSpecify sort order as: [+|-]key[,[+|-]key[,...]]\n"
+		"\t\t\tAvailable keys:\n"
+		"\t\t\t  pid(p), tgid(tg), name(n), stacktrace(st),\n"
+		"\t\t\t  txt(T), alloc_ts(at), allocator(ator), module(mod)\n"
+		"\t\t\tThe \"+\" is optional since default direction is\n"
+		"\t\t\tincreasing numerical or lexicographic order.\n"
+		"\t\t\tMixed use of abbreviated and complete-form is allowed.\n"
+		"\t\t\tExamples:\n"
+		"\t\t\t  --sort=n,+pid,-tgid\n"
+		"\t\t\t  --sort=mod,at\n"
 	);
 }
 
_

Patches currently in -mm which might be from liuye@kylinos.cn are

mm-vmalloc-fix-vmap_purge_lock-livelock-under-memory-pressure.patch
tools-mm-page_owner_sort-fix-sort-option-being-silently-ignored.patch
tools-mm-page_owner_sort-add-module-name-sort-cull-filter-support.patch
tools-mm-page_owner_sort-show-available-sort-keys-in-usage-text.patch