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b=BALTpbRISpGpz7f9L+iMxDqhbRXo+WEArVF+If32LVKoLo9g1XGL7T6MEwr6Nir4A U1RLLNsCiXjyVn5PsScryWng/UsqdS1yaluv95zbxPd+E3h9mEcib97pt7lU5mP3Tf sEoEHAup6UQZ3wFig68QpIntp0PO95oZbgq6qUJdwrJC8nxcPSiJyHwmPrl5okW5UR yp9w7LZzfEutso9xFz2djU61/c8wD9Ncqq9AmzhwF+PkqT9IZ5aKYlBfRhnGu28+Tp 5v2ByFvQuIYoslZlpKtrhKVW1XH/K4w5B0Q6K/3cDdAFQ+TNj832aGAMSjL9dYjk3D JU9Sivey4NMNw== Date: Fri, 22 Aug 2025 08:54:32 +0300 From: Mike Rapoport To: linux-mm@kvack.org Cc: Andrew Morton , Bill Wendling , Daniel Jordan , Justin Stitt , Michael Ellerman , Miguel Ojeda , Nathan Chancellor , Nick Desaulniers , Wei Yang , linux-kernel@vger.kernel.org, llvm@lists.linux.dev Subject: Re: [PATCH 0/4] mm/mm_init: simplify deferred init of struct pages Message-ID: References: <20250818064615.505641-1-rppt@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250818064615.505641-1-rppt@kernel.org> X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: EE12D140008 X-Stat-Signature: emsih61qj7any1i5ce6go1u6fdh3w99d X-HE-Tag: 1755842081-585087 X-HE-Meta: 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 v3PHjO2j ouwqewd1Z0sno3n1rp6jfieW6rxqXoppNPkw3WCp7BKgdJ9waljgMxqdjGxGp29v5cxx2CuflbVfGFBbd39hTIhEt7rh3dOlsMYVdiepVk39Bup+A3fLBsnQ1fJe3qKdC5YkkZ9nGes3x5am7yYzsINxZgkryIPtXVvTBKTGPwk2JWiIitV1yA/pJ7N+ZWpMK4PgJs0+xG2T1C693FdwmsxuFF5P3oSqFlHElEvtrbaGVYdevMb4iSrAEXDI/YgmA5Jm8Tn3l/jmAm9i7uOGyvyavTC91fLCTU5eB6UFOv0cvHQckJL0FQ+rayK8mp8/YJitr3old6X9KydxTmbmRLlsVSfFR//u4AdRsjnCJpgDSeTpskmqKGi2h86vEWxsgLEwFwHB/PKQIzfVytmSp8QpR1w== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Aug 18, 2025 at 09:46:11AM +0300, Mike Rapoport wrote: > From: "Mike Rapoport (Microsoft)" > > Hi, > > These patches simplify deferred initialization of the memory map. > > Beside nice negative diffstat I measured 3ms reduction in the > initialization of deferred pages on single node system with 64GiB of RAM. > > I don't have access to large memory machines, so I'd really appreciate > testing of these patches on them to make sure there's no regression there. > > The patches are also available at git: > https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git/log/?h=deferred-memmap-init/v1 > > 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() I've added those to memblock tree > .clang-format | 1 - > include/linux/memblock.h | 22 ----- > mm/memblock.c | 64 ------------- > mm/mm_init.c | 195 +++++++++++++-------------------------- > 4 files changed, 62 insertions(+), 220 deletions(-) > > > base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 > -- > 2.50.1 > -- Sincerely yours, Mike.