From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6F0F8224B06 for ; Mon, 17 Nov 2025 01:33:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763343210; cv=none; b=o1L44fkbG0JCPG5sDmrYLNw+Rnnzs4hMQgCZpx8rhClR6lKh1JGiGSTlUnBVXmtxA7vFtIMcnhXHRNqJiyK/OsjE2DKkoRdjYDzWEH0swxtM9YNMypqcIhAoUtV8RgQgBIh6Ajves26kkty2ZZe5OsaNBCSmiGKxbf3rVlT/dq8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763343210; c=relaxed/simple; bh=n5nv0RjL78R8s0ncf/iUChBhEc3xFUuT8S077I1Uyzc=; h=Date:To:From:Subject:Message-Id; b=bNgTaDCGtqZQAQs9LIfC/5OJBt12d2db688thczGEVpUTL0xhcjEa/aT6nzklWvrFUyGyNc5KMopMDavBV8sl1NgRUOqZSWn6WqSCRttodteeXn3+fIF2peO0haQVfN6nCCSzwe3RQ/OJ4cJce4GWOwewrMJMFJqcM92VlSvzG0= 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=A7Yrwy5x; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="A7Yrwy5x" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 447F9C4CEF1; Mon, 17 Nov 2025 01:33:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1763343210; bh=n5nv0RjL78R8s0ncf/iUChBhEc3xFUuT8S077I1Uyzc=; h=Date:To:From:Subject:From; b=A7Yrwy5x4JrIIpNW8+fV4B7gBGREPrrvjPtVTznuMSZspxYTRWVywnLjwO8f9wS2L z5fbQ+qighP4MUNtCrIaBnrDVrNIdqgQFZl5LzLYH36czepm7IZEW3c2464m/Pz1D9 8TxofS76O7XP37SiyIvRczx85fYd1NYIMDgqfTOg= Date: Sun, 16 Nov 2025 17:33:29 -0800 To: mm-commits@vger.kernel.org,urezki@gmail.com,vishal.moola@gmail.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-vmalloc-request-large-order-pages-from-buddy-allocator.patch removed from -mm tree Message-Id: <20251117013330.447F9C4CEF1@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: request large order pages from buddy allocator has been removed from the -mm tree. Its filename was mm-vmalloc-request-large-order-pages-from-buddy-allocator.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: "Vishal Moola (Oracle)" Subject: mm/vmalloc: request large order pages from buddy allocator Date: Tue, 21 Oct 2025 12:44:56 -0700 Sometimes, vm_area_alloc_pages() will want many pages from the buddy allocator. Rather than making requests to the buddy allocator for at most 100 pages at a time, we can eagerly request large order pages a smaller number of times. We still split the large order pages down to order-0 as the rest of the vmalloc code (and some callers) depend on it. We still defer to the bulk allocator and fallback path in case of order-0 pages or failure. Running 1000 iterations of allocations on a small 4GB system finds: 1000 2mb allocations: [Baseline] [This patch] real 46.310s real 0m34.582 user 0.001s user 0.006s sys 46.058s sys 0m34.365s 10000 200kb allocations: [Baseline] [This patch] real 56.104s real 0m43.696 user 0.001s user 0.003s sys 55.375s sys 0m42.995s Link: https://lkml.kernel.org/r/20251021194455.33351-2-vishal.moola@gmail.com Signed-off-by: Vishal Moola (Oracle) Reviewed-by: Uladzislau Rezki (Sony) Signed-off-by: Andrew Morton --- mm/vmalloc.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) --- a/mm/vmalloc.c~mm-vmalloc-request-large-order-pages-from-buddy-allocator +++ a/mm/vmalloc.c @@ -3619,8 +3619,44 @@ vm_area_alloc_pages(gfp_t gfp, int nid, unsigned int order, unsigned int nr_pages, struct page **pages) { unsigned int nr_allocated = 0; + unsigned int nr_remaining = nr_pages; + unsigned int max_attempt_order = MAX_PAGE_ORDER; struct page *page; int i; + gfp_t large_gfp = (gfp & + ~(__GFP_DIRECT_RECLAIM | __GFP_NOFAIL | __GFP_COMP)) + | __GFP_NOWARN; + unsigned int large_order = ilog2(nr_remaining); + + large_order = min(max_attempt_order, large_order); + + /* + * Initially, attempt to have the page allocator give us large order + * pages. Do not attempt allocating smaller than order chunks since + * __vmap_pages_range() expects physically contigous pages of exactly + * order long chunks. + */ + while (large_order > order && nr_remaining) { + if (nid == NUMA_NO_NODE) + page = alloc_pages_noprof(large_gfp, large_order); + else + page = alloc_pages_node_noprof(nid, large_gfp, large_order); + + if (unlikely(!page)) { + max_attempt_order = --large_order; + continue; + } + + split_page(page, large_order); + for (i = 0; i < (1U << large_order); i++) + pages[nr_allocated + i] = page + i; + + nr_allocated += 1U << large_order; + nr_remaining = nr_pages - nr_allocated; + + large_order = ilog2(nr_remaining); + large_order = min(max_attempt_order, large_order); + } /* * For order-0 pages we make use of bulk allocator, if _ Patches currently in -mm which might be from vishal.moola@gmail.com are mm-madvise-allow-guard-page-install-remove-under-vma-lock.patch mm-vmalloc-warn-on-invalid-vmalloc-gfp-flags.patch mm-vmalloc-add-a-helper-to-optimize-vmalloc-allocation-gfps.patch mm-vmalloc-cleanup-large_gfp-in-vm_area_alloc_pages.patch mm-vmalloc-cleanup-gfp-flag-use-in-new_vmap_block.patch