linux-kernel - [GIT PULL] mm/mm_init: simplify deferred initialization of struct pages

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Message-ID: <aODmrlNys5x2LVtl@kernel.org>
Date: Sat, 4 Oct 2025 11:19:42 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Mike Rapoport <rppt@...nel.org>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [GIT PULL] mm/mm_init: simplify deferred initialization of struct
 pages

Hi Linus,

The following changes since commit b320789d6883cc00ac78ce83bccbfe7ed58afcf0:

  Linux 6.17-rc4 (2025-08-31 15:33:07 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock tags/memblock-v6.18-rc1

for you to fetch changes up to e68f150bc11d0a05cbe984a4e5c0f72a95cae07d:

  memblock: drop for_each_free_mem_pfn_range_in_zone_from() (2025-09-14 08:49:03 +0300)

----------------------------------------------------------------
mm/mm_init: simplify deferred initialization of struct pages

Refactor and simplify deferred initialization of the memory map.

Beside the negative diffstat it gives 3ms (55ms vs 58ms) reduction in the
initialization of deferred pages on single node system with 64GiB of RAM.

----------------------------------------------------------------
Mike Rapoport (Microsoft) (4):
      mm/mm_init: use deferred_init_memmap_chunk() in deferred_grow_zone()
      mm/mm_init: deferred_init_memmap: use a job per zone
      mm/mm_init: drop deferred_init_maxorder()
      memblock: drop for_each_free_mem_pfn_range_in_zone_from()

 .clang-format            |   1 -
 include/linux/memblock.h |  22 ------
 mm/memblock.c            |  64 ---------------
 mm/mm_init.c             | 197 ++++++++++++++++-------------------------------
 4 files changed, 65 insertions(+), 219 deletions(-)

-- 
Sincerely yours,
Mike.