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 11C72382F26 for ; Sat, 8 Aug 2026 16:58:15 +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=1786208297; cv=none; b=W3FJhPbYBStqKInhUxhtOWjPy+uJvZP1F1Be36yDf+KQ2ydIYeG8Ydd8bU7+C78K9x0M+SOaKe26ZIAnkl/LFM82MfMYG4J9z9PnJef1h74uklAsG83d3xmI9Iwz6nkxlhO1bZpfBF8wykzIJAIPBktx9fDFX3JySjnDkq57VOw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786208297; c=relaxed/simple; bh=qXMXoAKT3nV4KSi1lY+vnJJNUE8Hmvtgh51+Ew5YVnk=; h=Date:To:From:Subject:Message-Id; b=SFgZdwldZ7wCu5YnwN8COrKJUyL/TkTpeGhhAGtBz6RxHXqJJ6/IVP0o0Z+pXhQRISUAJWXElcX3U3UrgiN9fXPubFXntuQOxDWCPl5BOr7B+3QQsiFR06S4jZ6d2b4y0BM4idD6yiBy9atR6yIyowHBD9f5t3zAMUeaKIDLbX4= 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=wo6wv50X; 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="wo6wv50X" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2B771F00A3A; Sat, 8 Aug 2026 16:58:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1786208295; bh=LB/0L+ID7+TBV4+++u0ZKAjwzV/oNJZ2KOsBy3EcIbE=; h=Date:To:From:Subject; b=wo6wv50X8hoVcBoZGcF9zXgBc4GBEHtbnBFTJDK45hRDY9HoAG7RjzZ5XJWpOYAau QTvDyTxL9Ow+QjDozncCRxc3w1gTIEd9LiNNwu6+7eIfB/KKxTH04ea7S9AgFaO0nj 1RoBQnFlqVlxjNPe2TQS4TWfxyPIm/N9MLscJyCg= Date: Sat, 08 Aug 2026 09:58:15 -0700 To: mm-commits@vger.kernel.org,xueyuan.chen21@gmail.com,will@kernel.org,urezki@gmail.com,ryan.roberts@arm.com,rppt@kernel.org,leo.yan@arm.com,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: [to-be-updated] mm-vmalloc-align-vm_area-so-vmap-can-batch-mappings.patch removed from -mm tree Message-Id: <20260808165815.A2B771F00A3A@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm/vmalloc: align vm_area so vmap() can batch mappings has been removed from the -mm tree. Its filename was mm-vmalloc-align-vm_area-so-vmap-can-batch-mappings.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: "Barry Song (Xiaomi)" Subject: mm/vmalloc: align vm_area so vmap() can batch mappings Date: Wed, 15 Jul 2026 20:08:13 +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. We do not expect any significant overhead for this. 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/20260715120813.3609949-8-jiangwen6@xiaomi.com Signed-off-by: Barry Song (Xiaomi) Signed-off-by: Wen Jiang Tested-by: Xueyuan Chen Tested-by: Leo Yan Reviewed-by: Uladzislau Rezki (Sony) Reviewed-by: Dev Jain Cc: Andrew Donnellan Cc: Anshuman Khandual Cc: Catalin Marinas Cc: David Hildenbrand Cc: Mike Rapoport Cc: Ryan Roberts Cc: Wen Jiang Cc: Will Deacon Signed-off-by: Andrew Morton --- mm/vmalloc.c | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) --- a/mm/vmalloc.c~mm-vmalloc-align-vm_area-so-vmap-can-batch-mappings +++ a/mm/vmalloc.c @@ -3336,6 +3336,14 @@ struct vm_struct *get_vm_area_caller(uns NUMA_NO_NODE, GFP_KERNEL, caller); } +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); +} + /** * find_vm_area - find a continuous kernel virtual area * @addr: base address @@ -3662,6 +3670,30 @@ out: return err; } +static struct vm_struct *vmap_get_aligned_vm_area(unsigned long size, + unsigned long flags, pgprot_t prot, const void *caller) +{ + struct vm_struct *vm_area; + unsigned int shift; + + if (arch_vmap_pmd_supported(prot) && size >= PMD_SIZE) { + vm_area = __get_vm_area_node_aligned_caller(size, PMD_SIZE, + flags, caller); + if (vm_area) + return vm_area; + } + + 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; + } + + 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 @@ -3700,7 +3732,8 @@ 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, prot, + __builtin_return_address(0)); if (!area) return NULL; _ Patches currently in -mm which might be from baohua@kernel.org are