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 435CD386C39 for ; Thu, 10 Sep 2026 23:05:49 +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=1789081550; cv=none; b=Stqhffxqi4A0rH81fbiTOm7MZwjkTeEd/LLzYUxZ7OIpFDKM+l9gH+cGk7tq8ERmSXB5/ke18BxwNZqEkTI7fzMOY8CakC83ROtloikZt3a00kvHZkWhxT9t0vrEMflWHmStpRhaa45lIK81UN78MWTt/ILwU4ITD2uwu3NX4lI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789081550; c=relaxed/simple; bh=1869OdKg6q+Wb/Rk65XK9gjMxuVPkoF42gKLUIM+8is=; h=Date:To:From:Subject:Message-Id; b=X3su72QLyPg5PhnTpPFsDjCA+D0k7ifzbaHx2AvSG2jeYv5HHGO/bM0MLcu7QVCIHXcZyB75KBPGcCZ1jHYraJAayuPiNn5aKN1AtBOACyyZWVH+vffBSITNBEMlRBrJWVH5sCwtidojHULI8gDEyI8RVywpET2iOGyVX+6HDeg= 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=EytPLriw; 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="EytPLriw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1781D1F000FF; Thu, 10 Sep 2026 23:05:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789081549; bh=sCFyzTYStdw5g5Y4/puDdUj5dEtA+qw5yCRP52bt1No=; h=Date:To:From:Subject; b=EytPLriwN3wxlUKABYcr68g+G0eUQLpulKX8fDQun4bZ41SJLtHJ1PWOegrwVYLNR y1/KhsmI/0Nf72ACFEekph/gk0RB2XY7aJGSJFaXetki0RdiIL0Ibj2r5Xz35U5GdF VbUOmw5N0lcUJCcnoyAH9MHTv1TqVvNnOlCA+C4U= Date: Thu, 10 Sep 2026 16:05:48 -0700 To: mm-commits@vger.kernel.org,songmuchun@bytedance.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-hugetlb-remove-huge_bootmem_cma.patch added to mm-unstable branch Message-Id: <20260910230549.1781D1F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/hugetlb: remove HUGE_BOOTMEM_CMA has been added to the -mm mm-unstable branch. Its filename is mm-hugetlb-remove-huge_bootmem_cma.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hugetlb-remove-huge_bootmem_cma.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 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: Muchun Song Subject: mm/hugetlb: remove HUGE_BOOTMEM_CMA Date: Thu, 10 Sep 2026 14:32:54 +0800 Track early CMA hugetlb pages from the hstate instead of storing a redundant bootmem flag. This removes the unused helper and keeps the bootmem metadata minimal. Link: https://lore.kernel.org/20260910063256.64386-16-songmuchun@bytedance.com Signed-off-by: Muchun Song Acked-by: Mike Rapoport (Microsoft) Acked-by: Qi Zheng Cc: David Hildenbrand (Arm) Cc: David Laight Cc: Liam R. Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Oscar Salvador Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- include/linux/hugetlb.h | 1 - mm/hugetlb.c | 14 ++++---------- 2 files changed, 4 insertions(+), 11 deletions(-) --- a/include/linux/hugetlb.h~mm-hugetlb-remove-huge_bootmem_cma +++ a/include/linux/hugetlb.h @@ -676,7 +676,6 @@ struct hstate { }; #define HUGE_BOOTMEM_ZONES_VALID BIT(0) -#define HUGE_BOOTMEM_CMA BIT(1) int isolate_or_dissolve_huge_folio(struct folio *folio, struct list_head *list); int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn); --- a/mm/hugetlb.c~mm-hugetlb-remove-huge_bootmem_cma +++ a/mm/hugetlb.c @@ -3144,7 +3144,7 @@ static bool __init alloc_bootmem_huge_pa */ INIT_LIST_HEAD(&m->list); m->hstate = h; - m->flags = hugetlb_early_cma(h) ? HUGE_BOOTMEM_CMA : 0; + m->flags = 0; /* CMA pages: zone-crossing is validated in hugetlb_cma_reserve(). */ if (!hugetlb_early_cma(h) && @@ -3220,11 +3220,6 @@ static void __init hugetlb_folio_init_vm prep_compound_head(&folio->page, huge_page_order(h)); } -static bool __init hugetlb_bootmem_page_earlycma(struct huge_bootmem_page *m) -{ - return m->flags & HUGE_BOOTMEM_CMA; -} - /* * memblock-allocated pageblocks might not have the migrate type set * if marked with the 'noinit' flag. Set it to the default (MIGRATE_MOVABLE) @@ -3316,9 +3311,6 @@ static void __init gather_bootmem_preall folio_set_hugetlb_vmemmap_optimized(folio); section_set_compound_order_range(pfn, folio_nr_pages(folio), 0); - if (hugetlb_bootmem_page_earlycma(m)) - folio_set_hugetlb_cma(folio); - list_add(&folio->lru, &folio_list); /* @@ -3329,7 +3321,9 @@ static void __init gather_bootmem_preall * For CMA pages, this is done in init_cma_pageblock * (via hugetlb_bootmem_init_migratetype), so skip it here. */ - if (!folio_test_hugetlb_cma(folio)) + if (hugetlb_early_cma(h)) + folio_set_hugetlb_cma(folio); + else adjust_managed_page_count(page, pages_per_huge_page(h)); cond_resched(); } _ Patches currently in -mm which might be from songmuchun@bytedance.com are mm-sparse-relax-struct-mem_section-size-constraints.patch mm-sparse-vmemmap-rename-hvo-order-macros.patch mm-mm_init-skip-initializing-shared-vmemmap-tail-pages.patch mm-sparse-vmemmap-initialize-shared-tail-vmemmap-pages-on-allocation.patch mm-sparse-vmemmap-support-section-based-vmemmap-accounting.patch mm-mm_init-factor-out-pfn_to_zone.patch mm-sparse-vmemmap-move-helpers-ahead-of-future-callers.patch mm-sparse-vmemmap-support-section-based-vmemmap-optimization.patch mm-sparse-initialize-memory-sections-earlier.patch mm-hugetlb-switch-hugetlb-to-section-based-vmemmap-optimization.patch mm-sparse-vmemmap-remove-sparsemem_vmemmap_preinit-support.patch mm-sparse-inline-usemap-allocation-into-sparse_init_nid.patch mm-sparse-remove-section_map_size.patch mm-hugetlb-remove-huge_bootmem_hvo.patch mm-hugetlb-remove-huge_bootmem_cma.patch mm-hugetlb-localize-struct-huge_bootmem_page.patch mm-hugetlb-localize-huge_bootmem_zones_valid.patch mm-sparse-vmemmap-introduce-config_sparsemem_vmemmap_optimization.patch mm-sparse-vmemmap-factor-out-shared-vmemmap-tail-page-allocation.patch mm-sparse-vmemmap-open-code-init_compound_tail.patch mm-sparse-vmemmap-prepare-dax-vmemmap-population-for-section-orders.patch mm-sparse-vmemmap-set-section-order-for-device-dax.patch mm-sparse-vmemmap-switch-device-dax-to-shared-tail-vmemmap-pages.patch mm-sparse-vmemmap-move-hvo-helpers-to-a-public-header.patch powerpc-mm-switch-device-dax-to-shared-tail-vmemmap-pages.patch mm-sparse-vmemmap-drop-the-extra-tail-page-from-device-dax-reservation.patch mm-sparse-vmemmap-drop-unused-section_nr_vmemmap_pages-arguments.patch documentation-mm-update-dax-vmemmap-deduplication-docs.patch