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 E2FAE3043CF for ; Thu, 25 Jun 2026 02:57:36 +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=1782356258; cv=none; b=Cd79nndfJ1DX2b4EaDU4TMM/GHhaICH48/5Zb2nmnkOi3WJH200DpFTL7+UBJY1ODKsfrV3G7+B/+alrVVkAU/kjuFVRyiAhhbYuOrjwfFFhw/0qUxaomGL5kK0+sYkb9Xfn7UlHAFAeXN1igsJcF19piuUWYbfSY9oXernFS7Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782356258; c=relaxed/simple; bh=B8ShA3NqhGjnbOfVS5zkyJ0AN7NpdieoGHmacHYVtvo=; h=Date:To:From:Subject:Message-Id; b=DgGaVWnTZx5irrp+6gvDkwG2qQhKPvMaPdEn9Jx0ghtljg47NXB3yqmKJoyaFposiqX8rIBJRRO+LmrMfArc1VT/DGQ7l0mbGbNm/sgTamkDuil+By4/jxJBUXJ6rhOAXYnAWYZo8IIquKXDEJ23hsnBkw4bSLK8Q5U5B5j6vhY= 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=ZYfS/mFS; 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="ZYfS/mFS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AE6361F000E9; Thu, 25 Jun 2026 02:57:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1782356256; bh=sxKqmXsg4VXsJtw4LxNbTts9gqrrzxrs9yX0axMkrFY=; h=Date:To:From:Subject; b=ZYfS/mFS/5pVnO70o5cUsKgeu7xJU7upPhcaPzGOKxs/aPC13KNbEKUKAGFhWRRBN HZa+oLGByZiv1PuCM/okIf45ExUOmPTFce6CFGD9eBE4gic1Bd3f1hbX5CwqHTj2Bq dxrg9ynqHt5Y5snsX83WvV69NPS3Q3h7Ak6v0aB4= Date: Wed, 24 Jun 2026 19:57:36 -0700 To: mm-commits@vger.kernel.org,xueyuan.chen21@gmail.com,will@kernel.org,urezki@gmail.com,ryan.roberts@arm.com,rppt@kernel.org,jiangwenxiaomi@gmail.com,jiangwen6@xiaomi.com,dev.jain@arm.com,david@kernel.org,catalin.marinas@arm.com,anshuman.khandual@arm.com,ajd@linux.ibm.com,baohua@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-vmalloc-align-vm_area-so-vmap-can-batch-mappings.patch added to mm-new branch Message-Id: <20260625025736.AE6361F000E9@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/vmalloc: align vm_area so vmap() can batch mappings has been added to the -mm mm-new branch. Its filename is mm-vmalloc-align-vm_area-so-vmap-can-batch-mappings.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-align-vm_area-so-vmap-can-batch-mappings.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: "Barry Song (Xiaomi)" Subject: mm/vmalloc: align vm_area so vmap() can batch mappings Date: Thu, 18 Jun 2026 16:47:26 +0800 Try to align the vmap virtual address to PMD_SHIFT or a larger PTE mapping size hinted by the architecture, so contiguous pages can be batch-mapped when setting PMD or PTE entries. Add __get_vm_area_node_aligned_caller() as a wrapper over __get_vm_area_node() to simplify repeated calls with fixed arguments. Link: https://lore.kernel.org/20260618084726.1070022-7-jiangwen6@xiaomi.com Signed-off-by: Barry Song (Xiaomi) Signed-off-by: Wen Jiang Tested-by: Xueyuan Chen Cc: Andrew Donnellan Cc: Anshuman Khandual Cc: Catalin Marinas Cc: David Hildenbrand Cc: Dev Jain Cc: Mike Rapoport Cc: Ryan Roberts Cc: Uladzislau Rezki Cc: Wen Jiang Cc: Will Deacon Signed-off-by: Andrew Morton --- mm/vmalloc.c | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) --- a/mm/vmalloc.c~mm-vmalloc-align-vm_area-so-vmap-can-batch-mappings +++ a/mm/vmalloc.c @@ -3633,6 +3633,41 @@ out: return err; } +static struct vm_struct *__get_vm_area_node_aligned_caller(unsigned long size, + unsigned long align, unsigned long flags, const void *caller) +{ + return __get_vm_area_node(size, align, PAGE_SHIFT, flags, + VMALLOC_START, VMALLOC_END, + NUMA_NO_NODE, GFP_KERNEL, caller); +} + +static struct vm_struct *vmap_get_aligned_vm_area(unsigned long size, + unsigned long flags, const void *caller) +{ + struct vm_struct *vm_area; + unsigned int shift; + + /* Try PMD alignment for large sizes */ + if (size >= PMD_SIZE) { + vm_area = __get_vm_area_node_aligned_caller(size, PMD_SIZE, + flags, caller); + if (vm_area) + return vm_area; + } + + /* Try CONT_PTE alignment */ + shift = arch_vmap_pte_supported_shift(size); + if (shift > PAGE_SHIFT) { + vm_area = __get_vm_area_node_aligned_caller(size, 1UL << shift, + flags, caller); + if (vm_area) + return vm_area; + } + + /* Fall back to page alignment */ + return __get_vm_area_node_aligned_caller(size, PAGE_SIZE, flags, caller); +} + /** * vmap - map an array of pages into virtually contiguous space * @pages: array of page pointers @@ -3671,7 +3706,7 @@ void *vmap(struct page **pages, unsigned return NULL; size = (unsigned long)count << PAGE_SHIFT; - area = get_vm_area_caller(size, flags, __builtin_return_address(0)); + area = vmap_get_aligned_vm_area(size, flags, __builtin_return_address(0)); if (!area) return NULL; _ Patches currently in -mm which might be from baohua@kernel.org are arm64-hugetlb-extend-batching-of-multiple-cont_pte-in-a-single-pte-setup.patch arm64-vmalloc-allow-arch_vmap_pte_range_map_size-to-batch-multiple-cont_pte.patch mm-vmalloc-extend-page-table-walk-to-support-larger-page_shift-sizes-and-eliminate-page-table-rewalk.patch mm-vmalloc-map-contiguous-pages-in-batches-for-vmap-if-possible.patch mm-vmalloc-align-vm_area-so-vmap-can-batch-mappings.patch