From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 87AB93ED3B4 for ; Mon, 21 Sep 2026 22:49:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790030971; cv=none; b=tRZLDOfzO8x0F+fmjjnn1ILMvISsrF/1KNLL0g2heGYXotwrOHq88zZnzLcapmWSrBsncU50hKWrCMt9sLbtPtuCAQSwKBjBcwe+mbNmaheLI64q7CX3jtoK8a1EZIFRc0SAGODKOBCxD3X6eqZfe/anYQVwplcVECzsIu3TWkY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790030971; c=relaxed/simple; bh=Po+6DJby44qJjWeRL4X4fGwKOR4zbMpImnKT/Ictiao=; h=Date:To:From:Subject:Message-Id; b=XRijySnztafj0KnRF33hL14nIpeBTTvZkD2vrkdWIF3oiJobBFOlOdF8Neg9jGUUG71FJftYDPXqswZVDiVdV0l4fvgYvnQ+gNUAGZ7lU5HMlnRJbpoU1EQQZzoGPMKA/pPso9etPLSBmEFT09d3Rjat8P1Uo+V9xC+SSepdCd8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=0sNFb1ps; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="0sNFb1ps" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 23BB41F000FF; Mon, 21 Sep 2026 22:49:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1790030970; bh=3oYlR70J+wCu+u7JdV+1d/j8HMUtCK/lqLjcJcBdzLA=; h=Date:To:From:Subject; b=0sNFb1ps75tcFbxhY0uqLisg+NRAJnUqLWpMS+4sRSpx+49KC0TuKpHeBMWE+dt5F eAOKJEjI90U7/yF9JhUo2B0TNjjh0VOfEt8yZFCu8tcX9hrMPgL4jDLZd/KW5RqLex k3ISGEaVJCc6UaoVxFs2VGWCkqG9kmRfIpOHlj/M= Date: Mon, 21 Sep 2026 15:49:29 -0700 To: mm-commits@vger.kernel.org,david@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-sparse-move-mem_section-init-to-sparse_extreme_init.patch added to mm-new branch Message-Id: <20260921224930.23BB41F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/sparse: move mem_section init to sparse_extreme_init() has been added to the -mm mm-new branch. Its filename is mm-sparse-move-mem_section-init-to-sparse_extreme_init.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-sparse-move-mem_section-init-to-sparse_extreme_init.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: "David Hildenbrand (Arm)" Subject: mm/sparse: move mem_section init to sparse_extreme_init() Date: Mon, 21 Sep 2026 21:58:53 +0200 Patch series "mm/sparse: remove SECTION_MARKED_PRESENT and further cleanups", v2. SECTION_MARKED_PRESENT is really only needed during boot, where we can instead just rely on SECTION_IS_EARLY_BIT by setting that flag earlier. Some preparations for doing that conversion and some cleanups in the same (sparse) area. This patch (of 13): Let's just avoid another pair of ifdef inside a function. While at it, switch to INTERNODE_CACHE_BYTES by just defining a fallback in cache.h as well, given that the x86 variant already provides one. Link: https://lore.kernel.org/20260921-b4-sparsemem_cleanups-v2-0-54d81d65e125@kernel.org Link: https://lore.kernel.org/20260921-b4-sparsemem_cleanups-v2-1-54d81d65e125@kernel.org Signed-off-by: David Hildenbrand (Arm) Signed-off-by: Andrew Morton Acked-by: Oscar Salvador Reviewed-by: Lorenzo Stoakes (ARM) Reviewed-by: Mike Rapoport (Microsoft) Cc: Liam R. Howlett Cc: Vlastimil Babka Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Kairui Song Cc: Qi Zheng Cc: Shakeel Butt Cc: Barry Song Cc: Axel Rasmussen Cc: Yuanchu Xie Cc: Wei Xu Cc: Baoquan He Cc: Baolin Wang Cc: Brendan Jackman Cc: Johannes Weiner Cc: Zi Yan Cc: Jan Kiszka Cc: Kieran Bingham Cc: Greg Kroah-Hartman Cc: Rafael J. Wysocki Cc: Danilo Krummrich --- include/linux/cache.h | 1 + mm/sparse.c | 19 ++++++++++++------- 2 files changed, 13 insertions(+), 7 deletions(-) --- a/include/linux/cache.h~mm-sparse-move-mem_section-init-to-sparse_extreme_init +++ a/include/linux/cache.h @@ -89,6 +89,7 @@ */ #ifndef INTERNODE_CACHE_SHIFT #define INTERNODE_CACHE_SHIFT L1_CACHE_SHIFT +#define INTERNODE_CACHE_BYTES (1 << INTERNODE_CACHE_SHIFT) #endif #if !defined(____cacheline_internodealigned_in_smp) --- a/mm/sparse.c~mm-sparse-move-mem_section-init-to-sparse_extreme_init +++ a/mm/sparse.c @@ -103,11 +103,22 @@ int __meminit sparse_index_init(unsigned return 0; } + +static void __init sparse_extreme_init(void) +{ + const unsigned long size = sizeof(struct mem_section *) * NR_SECTION_ROOTS; + + mem_section = memblock_alloc_or_panic(size, INTERNODE_CACHE_BYTES); +} #else /* !SPARSEMEM_EXTREME */ int __meminit sparse_index_init(unsigned long section_nr, int nid) { return 0; } + +static void __init sparse_extreme_init(void) +{ +} #endif /* @@ -196,13 +207,7 @@ void __init sparse_sections_init(void) unsigned long start, end; int i, nid; -#ifdef CONFIG_SPARSEMEM_EXTREME - unsigned long size, align; - - size = sizeof(struct mem_section *) * NR_SECTION_ROOTS; - align = 1 << (INTERNODE_CACHE_SHIFT); - mem_section = memblock_alloc_or_panic(size, align); -#endif + sparse_extreme_init(); for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, &nid) memory_present(nid, start, end); _ Patches currently in -mm which might be from david@kernel.org are maintainers-split-up-memory-management-memory-policy-and-migration.patch maintainers-move-memory-tiering-under-memory-management-numa-placement.patch maintainers-make-gregory-a-co-maintainer-of-memory-management-numa-placement.patch selftests-mm-khugepaged-remove-str_dup-usage.patch mm-sparse-move-mem_section-init-to-sparse_extreme_init.patch mm-sparse-refactor-sparse_sections_init.patch mm-sparse-move-initialization-of-section-metadata-to-sparse_metadata_init.patch mm-sparse-rename-and-cleanup-sparse_init_nid.patch mm-sparse-cleanup-sparse_init_one_section.patch mm-sparse-rename-__highest_present_section_nr-to-__highest_used_section_nr.patch mm-sparse-remove-pfn_in_present_section.patch mm-sparse-move-__highest_used_section_nr-handling.patch scripts-gdb-mmpy-remove-fallbacks-for-section_has_mem_map-and-section_is_early.patch mm-sparse-remove-section_marked_present.patch mm-sparse-remove-flags-parameter-from-sparse_init_one_section.patch fs-proc-page-clarify-comment-in-get_max_dump_pfn.patch mm-memory_hotplug-drop-config_have_arch_pfn_valid-handling-from-pfn_to_online_page.patch