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 E58334E433E for ; Tue, 29 Sep 2026 21:32:44 +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=1790717567; cv=none; b=AafuwmDcRhMVW5CqIFP9p7Z7EF47ZE17MyLDOVwS9HaL1BJPCjo0r9A8EcgQECCsikF813lQEcAK1U66VQ6ERFtYeEz5MmV+dIgb7JO/sT3FPkG6usohVnqXbmHJNJohwYY92QbMTFQ9lk6NeGwP50IUYp0nw6yj0PaGTUU6K7c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790717567; c=relaxed/simple; bh=aq9LL/R99kL2Ud4gdOIpjpt71WgSaGuqtazwf8DQUMc=; h=Date:To:From:Subject:Message-Id; b=ehXGUOI4xh1MzqNmdkk2XAQwPLdt9F4H6lPlMc62dvtSnUHNcX66qqDzUQgnbEouW2gfkGn9QTM0+r2a8PmK1mUfBktug55snqP2ZtcdbQigkD662VkrRLOYtrS1K0l00nYlkHnS4KWEGh56nR0VAjSzUmoiXEC6n1agJFDHhog= 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=fHSwq1HV; 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="fHSwq1HV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5787C1F000FF; Tue, 29 Sep 2026 21:32:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1790717564; bh=0of3942RN1Yf61wB2p8KACvrZY42YA9bw0H7wzwxIGk=; h=Date:To:From:Subject; b=fHSwq1HVH+xGPYSHeawXkqIL4qj9NrJHOH9hHMOjGJQq8N0DxwvNwSAHdFh2NSjgK VtuV1gX6U2TQBO05f9rTjz1Zp/HfAWDPvgEkYYFVfurXEvaJsBKECcmXU1mI6WGqR2 Eg4VlOpYTC8PdJYyFTeXENZf8hLLzJCHNBIZzExI= Date: Tue, 29 Sep 2026 14:32:43 -0700 To: mm-commits@vger.kernel.org,muchun.song@linux.dev,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-sparse-vmemmap-open-code-vmemmap_populate_address.patch added to mm-new branch Message-Id: <20260929213244.5787C1F000FF@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-vmemmap: open-code vmemmap_populate_address() has been added to the -mm mm-new branch. Its filename is mm-sparse-vmemmap-open-code-vmemmap_populate_address.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-sparse-vmemmap-open-code-vmemmap_populate_address.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: Muchun Song Subject: mm/sparse-vmemmap: open-code vmemmap_populate_address() Date: Tue, 29 Sep 2026 13:32:30 +0800 vmemmap_populate_address() no longer has any callers that need the returned PTE. Its only remaining user, vmemmap_populate_range(), only checks whether population succeeded. Open-code vmemmap_populate_address() directly in vmemmap_populate_basepages(), remove the now-redundant range helper, and return -ENOMEM directly on failure. Link: https://lore.kernel.org/20260929053231.66085-6-songmuchun@bytedance.com Signed-off-by: Muchun Song Signed-off-by: Andrew Morton Acked-by: Qi Zheng Cc: Madhavan Srinivasan Cc: Mike Rapoport Cc: David Hildenbrand Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Christophe Leroy Cc: Ritesh Harjani (IBM) Cc: Shrikanth Hegde Cc: Lorenzo Stoakes Cc: Liam R. Howlett Cc: Vlastimil Babka Cc: Suren Baghdasaryan Cc: Michal Hocko --- mm/sparse-vmemmap.c | 54 +++++++++++++----------------------------- 1 file changed, 17 insertions(+), 37 deletions(-) --- a/mm/sparse-vmemmap.c~mm-sparse-vmemmap-open-code-vmemmap_populate_address +++ a/mm/sparse-vmemmap.c @@ -348,8 +348,8 @@ static pgd_t * __meminit vmemmap_pgd_pop return pgd; } -static pte_t * __meminit vmemmap_populate_address(unsigned long addr, int node, - struct vmem_altmap *altmap) +int __meminit vmemmap_populate_basepages(unsigned long start, unsigned long end, + int node, struct vmem_altmap *altmap) { pgd_t *pgd; p4d_t *p4d; @@ -357,48 +357,28 @@ static pte_t * __meminit vmemmap_populat pmd_t *pmd; pte_t *pte; - pgd = vmemmap_pgd_populate(addr, node); - if (!pgd) - return NULL; - p4d = vmemmap_p4d_populate(pgd, addr, node); - if (!p4d) - return NULL; - pud = vmemmap_pud_populate(p4d, addr, node); - if (!pud) - return NULL; - pmd = vmemmap_pmd_populate(pud, addr, node); - if (!pmd) - return NULL; - pte = vmemmap_pte_populate(pmd, addr, node, altmap); - if (!pte) - return NULL; - vmemmap_verify(pte, node, addr, addr + PAGE_SIZE); - - return pte; -} - -static int __meminit vmemmap_populate_range(unsigned long start, - unsigned long end, int node, - struct vmem_altmap *altmap) -{ - unsigned long addr = start; - pte_t *pte; - - for (; addr < end; addr += PAGE_SIZE) { - pte = vmemmap_populate_address(addr, node, altmap); + for (unsigned long addr = start; addr < end; addr += PAGE_SIZE) { + pgd = vmemmap_pgd_populate(addr, node); + if (!pgd) + return -ENOMEM; + p4d = vmemmap_p4d_populate(pgd, addr, node); + if (!p4d) + return -ENOMEM; + pud = vmemmap_pud_populate(p4d, addr, node); + if (!pud) + return -ENOMEM; + pmd = vmemmap_pmd_populate(pud, addr, node); + if (!pmd) + return -ENOMEM; + pte = vmemmap_pte_populate(pmd, addr, node, altmap); if (!pte) return -ENOMEM; + vmemmap_verify(pte, node, addr, addr + PAGE_SIZE); } return 0; } -int __meminit vmemmap_populate_basepages(unsigned long start, unsigned long end, - int node, struct vmem_altmap *altmap) -{ - return vmemmap_populate_range(start, end, node, altmap); -} - /* * Write protect the mirrored tail page structs for HVO. This will be * called from the hugetlb code when gathering and initializing the _ Patches currently in -mm which might be from muchun.song@linux.dev are mm-sparse-vmemmap-factor-out-shared-vmemmap-tail-page-allocation.patch mm-sparse-vmemmap-allocate-shared-tail-page-array-dynamically.patch mm-sparse-vmemmap-introduce-config_vmemmap_optimization.patch mm-sparse-vmemmap-open-code-init_compound_tail.patch mm-sparse-vmemmap-prepare-dax-vmemmap-population-for-compound-page-orders.patch mm-sparse-vmemmap-set-compound-page-order-for-device-dax.patch mm-sparse-vmemmap-switch-device-dax-to-shared-tail-vmemmap-pages.patch mm-sparse-vmemmap-switch-device-dax-to-shared-tail-vmemmap-pages-fix.patch mm-sparse-vmemmap-move-vmemmap-optimization-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 mm-sparse-vmemmap-drop-vmemmap_populate_dax.patch mm-sparse-vmemmap-support-device-dax-in-common-vmemmap-path.patch mm-sparse-vmemmap-drop-device-dax-specific-population-path.patch mm-sparse-vmemmap-remove-the-unused-ptpfn-argument.patch mm-sparse-vmemmap-open-code-vmemmap_populate_address.patch mm-mm_init-add-zone-mismatch-warning-during-page-init.patch