tools/mm/page_owner_sort: add module name sort/cull/filter support

Page owner stack traces already contain kernel module names in the
"[module]" format produced by %pS, but page_owner_sort has no way to sort,
cull, or filter by module.

Extract the first module name from each record's stack trace using the
regex \[([a-zA-Z0-9_]+)\].  Records whose stack traces contain no module
frames are assigned "vmlinux".

New options:
  -M                  Sort by module name
  --sort=mod          Sort by module name (supports +/- prefix)
  --cull=mod          Cull (aggregate) by module name
  --module <modlist>  Filter to records matching the given module(s)

The module field is also printed in cull output when relevant.

Link: https://lore.kernel.org/20260819021611.2910835-3-ye.liu@linux.dev
Signed-off-by: Ye Liu <liuye@kylinos.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: 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: Liu Jing <liujing@cmss.chinamobile.com>
Cc: Yichong Chen <chenyichong@uniontech.com>

0 files changed, 0 insertions, 0 deletions