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 4D5A93876DF for ; Thu, 10 Sep 2026 23:05:46 +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=1789081547; cv=none; b=pzLR96dIX2PZ9FRzP5seN/OR0e++8FeF1BJcXKWg1JKe1h6TBBrg3XBUN++ywALKnoaGNrpjTuCGtnUQZK5AvX83HIx1rIzxck1f37ZdOn9BPCY3uk3pW3tE4n9PWyKuPfFAvqiXJIsKsah/J8G/cuMbD9WMQN+CY1SGKTx7/YU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789081547; c=relaxed/simple; bh=/6U/1gebJvYjFbeyw3Mi8lNRhvX2wCuWG2I8S/turxs=; h=Date:To:From:Subject:Message-Id; b=hhfCs7f65CFoqmZoNuDDBDL3ANpOP84frH46XF4UvDMU1m00h9YgxO3nqfSn8s6yrGjW3ht7+ItaDVMQGESyNVZoGVco9QkcZDFj7pIoOd3sbDhHAvfSX2SabGuTH4TbF7xhSDInHbC7Q267M+pTM2XfdGQYeNbzas3ch6gb4UQ= 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=detktSf5; 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="detktSf5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 20D151F000FF; Thu, 10 Sep 2026 23:05:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789081546; bh=3E5BLquTMaIzRohjliWTvCyVF4CC2nyYU5IjRVYGHQM=; h=Date:To:From:Subject; b=detktSf5uw/dGEJlU6nF8edTEyWgnjlviCzGQp/1ztV/v0gOCrkYj+3qxgZ1bXuJP SmiiIFhNkn1hjk4Y25UFTsPRFUI9yFsKbQirUagVbM0aMr99qrEsIbxX2cr9AeQGeC uOgAb9k1iOE4CQKHjoVmXdf9AtKV0zSVIXJylRk4= Date: Thu, 10 Sep 2026 16:05:45 -0700 To: mm-commits@vger.kernel.org,songmuchun@bytedance.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-hugetlb-remove-huge_bootmem_hvo.patch added to mm-unstable branch Message-Id: <20260910230546.20D151F000FF@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_HVO has been added to the -mm mm-unstable branch. Its filename is mm-hugetlb-remove-huge_bootmem_hvo.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_hvo.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_HVO Date: Thu, 10 Sep 2026 14:32:53 +0800 The HUGE_BOOTMEM_HVO flag tracked whether a bootmem huge page had already gone through the old early vmemmap optimization path. Now that HugeTLB uses section-based vmemmap optimization, that state is already reflected in the compound page order stored in section metadata. Remove HUGE_BOOTMEM_HVO and its helper, and use the section state directly when deciding whether to mark a folio as vmemmap-optimized. Link: https://lore.kernel.org/20260910063256.64386-15-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 | 5 ++--- mm/hugetlb.c | 16 +++------------- mm/hugetlb_vmemmap.c | 2 -- 3 files changed, 5 insertions(+), 18 deletions(-) --- a/include/linux/hugetlb.h~mm-hugetlb-remove-huge_bootmem_hvo +++ a/include/linux/hugetlb.h @@ -675,9 +675,8 @@ struct hstate { char name[HSTATE_NAME_LEN]; }; -#define HUGE_BOOTMEM_HVO 0x0001 -#define HUGE_BOOTMEM_ZONES_VALID 0x0002 -#define HUGE_BOOTMEM_CMA 0x0004 +#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_hvo +++ a/mm/hugetlb.c @@ -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_prehvo(struct huge_bootmem_page *m) -{ - return m->flags & HUGE_BOOTMEM_HVO; -} - static bool __init hugetlb_bootmem_page_earlycma(struct huge_bootmem_page *m) { return m->flags & HUGE_BOOTMEM_CMA; @@ -3299,6 +3294,7 @@ static void __init gather_bootmem_preall list_for_each_entry_safe(m, tm, &huge_boot_pages[nid], list) { struct page *page = virt_to_page(m); struct folio *folio = (void *)page; + const unsigned long pfn = folio_pfn(folio); h = m->hstate; /* @@ -3316,15 +3312,9 @@ static void __init gather_bootmem_preall HUGETLB_VMEMMAP_RESERVE_PAGES); init_new_hugetlb_folio(folio); - if (hugetlb_bootmem_page_prehvo(m)) - /* - * If pre-HVO was done, just set the - * flag, the HVO code will then skip - * this folio. - */ + if (vmemmap_optimizable_order(pfn_to_section_compound_order(pfn))) folio_set_hugetlb_vmemmap_optimized(folio); - section_set_compound_order_range(folio_pfn(folio), - folio_nr_pages(folio), 0); + section_set_compound_order_range(pfn, folio_nr_pages(folio), 0); if (hugetlb_bootmem_page_earlycma(m)) folio_set_hugetlb_cma(folio); --- a/mm/hugetlb_vmemmap.c~mm-hugetlb-remove-huge_bootmem_hvo +++ a/mm/hugetlb_vmemmap.c @@ -715,8 +715,6 @@ void __init hugetlb_vmemmap_optimize_boo section_set_compound_order_range(pfn, pages_per_huge_page(h), huge_page_order(h)); - if (vmemmap_optimizable_order(pfn_to_section_compound_order(pfn))) - m->flags |= HUGE_BOOTMEM_HVO; } static const struct ctl_table hugetlb_vmemmap_sysctls[] = { _ 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