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b=MM3V287aiI9m0IN+XG1rOHfcDoe+kANyqIz0c2T3C9GyHcdXC2HB7UTNWu89NvHgq FNNE5jiVzDemJjt+bNXlIOej/Y0vbjNQKvaycWeOnhQ3Tr/8CmpVISajtIEkUr01Lh tMEBCPdGMcG9zEqTarNJKUbCUsK5GvmKLJ4JxBHg= Date: Thu, 27 Feb 2025 16:12:31 -0800 From: Andrew Morton To: Frank van der Linden Cc: muchun.song@linux.dev, linux-mm@kvack.org, yuzhao@google.com, usamaarif642@gmail.com, joao.m.martins@oracle.com, roman.gushchin@linux.dev, Johannes Weiner Subject: Re: [PATCH mm-unstable] mm: make SPARSEMEM_VMEMMAP_PREINIT an internal option Message-Id: <20250227161231.3b998da64aa029917d1fc9b8@linux-foundation.org> In-Reply-To: <20250227185717.1265644-1-fvdl@google.com> References: <20250227185717.1265644-1-fvdl@google.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: DCDB0140004 X-Rspamd-Server: rspam09 X-Stat-Signature: s9at7hfceqped65fmabkaueeb9uqqgpu X-HE-Tag: 1740701553-226654 X-HE-Meta: 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 DBrIqHAo 0ssXvZNwEcu7kIjFk27oH2LoyNDS9hveGcdCfVnydugnlePLsa9sWrFnMeOhqZkahqiLw/3ckVsztSIk8v/BSeBpFtB6ML18EOxxe/waORercz9dRtb268cUKB3P9PSofMNJGwH8jAGr/HQNvkXtFvd4O4crhfKZh0pWG0F4l6qdNqYz5hDRuz/xwKnQ2Orad5/EVxSPUEkL/kplnl6ZNLTPySaSw/eVpvLWQofIR/gnhPuYtVpmDgMWbOtFNx9saqEpJHb57XvIBOVexM679rekW1vf6reDTnMNSymgR+ghuvKcFvY5un6orYOFDtuf+XXQT 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 Thu, 27 Feb 2025 18:57:17 +0000 Frank van der Linden wrote: > SPARSEMEM_VMEMMAP_PREINIT is not useful as a user-facing > option, it is just something that should be selected > if a subsystem wishes to do vmemmap preinit. That's > currently only HUGETLB_PAGE_OPTIMIZE_VMEMMAP. > > So, make it a default-less option that is only selected > by HUGETLB_PAGE_OPTIMIZE_VMEMMAP, iff the architecture > has noted it is capable of doing hugetlb vmemmap preinit. > That is done via ARCH_WANT_HUGETLB_VMEMMAP_PREINIT, > renamed from ARCH_WANT_SPARSE_VMEMMAP_PREINIT. > I'm in a mess getting this landed in the right place in the series. We seem to have a few updates in the works so I'll drop this series again. And I'll disable Mike's "mm/mm_init: rename __init_reserved_page_zone to __init_page_from_nid" and "mm/mm_init: rename init_reserved_page to init_deferred_page" until "hugetlb/CMA improvements for large systems v5" appears.