linux-kernel - [PATCH v2 0/4] mm: folio_pte

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Message-ID: <20250702104926.212243-1-david@redhat.com>
Date: Wed,  2 Jul 2025 12:49:22 +0200
From: David Hildenbrand <david@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org,
	David Hildenbrand <david@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Jann Horn <jannh@...gle.com>,
	Mike Rapoport <rppt@...nel.org>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Michal Hocko <mhocko@...e.com>,
	Zi Yan <ziy@...dia.com>,
	Matthew Brost <matthew.brost@...el.com>,
	Joshua Hahn <joshua.hahnjy@...il.com>,
	Rakie Kim <rakie.kim@...com>,
	Byungchul Park <byungchul@...com>,
	Gregory Price <gourry@...rry.net>,
	Ying Huang <ying.huang@...ux.alibaba.com>,
	Alistair Popple <apopple@...dia.com>,
	Pedro Falcato <pfalcato@...e.de>,
	Rik van Riel <riel@...riel.com>,
	Harry Yoo <harry.yoo@...cle.com>,
	Lance Yang <ioworker0@...il.com>,
	Oscar Salvador <osalvador@...e.de>
Subject: [PATCH v2 0/4] mm: folio_pte_batch() improvements

Ever since we added folio_pte_batch() for fork() + munmap() purposes,
a lot more users appeared (and more are being proposed), and more
functionality was added.

Most of the users only need basic functionality, and could benefit from
a non-inlined version.

So let's clean up folio_pte_batch() and split it into a basic
folio_pte_batch() (no flags) and a more advanced folio_pte_batch_ext().
Using either variant will now look much cleaner.

This series will likely conflict with some changes in some
(old+new) folio_pte_batch() users, but conflicts should be trivial to
resolve.

Tested on x86-64. Cross-compile tested.

v1 -> v2:
* Use FPB_RESPECT_* instead of FPB_HONOR_*
* Use folio_pte_batch_flags() instead of folio_pte_batch_ext()
* Improvements to patch descriptions + comments/doc

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: "Liam R. Howlett" <Liam.Howlett@...cle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Jann Horn <jannh@...gle.com>
Cc: Mike Rapoport <rppt@...nel.org>
Cc: Suren Baghdasaryan <surenb@...gle.com>
Cc: Michal Hocko <mhocko@...e.com>
Cc: Zi Yan <ziy@...dia.com>
Cc: Matthew Brost <matthew.brost@...el.com>
Cc: Joshua Hahn <joshua.hahnjy@...il.com>
Cc: Rakie Kim <rakie.kim@...com>
Cc: Byungchul Park <byungchul@...com>
Cc: Gregory Price <gourry@...rry.net>
Cc: Ying Huang <ying.huang@...ux.alibaba.com>
Cc: Alistair Popple <apopple@...dia.com>
Cc: Pedro Falcato <pfalcato@...e.de>
Cc: Rik van Riel <riel@...riel.com>
Cc: Harry Yoo <harry.yoo@...cle.com>
Cc: Lance Yang <ioworker0@...il.com>
Cc: Oscar Salvador <osalvador@...e.de>

David Hildenbrand (4):
  mm: convert FPB_IGNORE_* into FPB_RESPECT_*
  mm: smaller folio_pte_batch() improvements
  mm: split folio_pte_batch() into folio_pte_batch() and
    folio_pte_batch_flags()
  mm: remove boolean output parameters from folio_pte_batch_ext()

 mm/internal.h  | 117 ++++++++++++++++++++++++++++---------------------
 mm/madvise.c   |  27 +++---------
 mm/memory.c    |  21 +++------
 mm/mempolicy.c |   5 +--
 mm/mlock.c     |   4 +-
 mm/mremap.c    |   4 +-
 mm/rmap.c      |   4 +-
 mm/util.c      |  29 ++++++++++++
 8 files changed, 112 insertions(+), 99 deletions(-)

base-commit: 01136079697c6686e7198bf1797c004767ecf6f1
-- 
2.49.0