From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8758EC79FA7 for ; Mon, 5 Jan 2026 16:17:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id ED3656B017C; Mon, 5 Jan 2026 11:17:56 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id E80B16B0184; Mon, 5 Jan 2026 11:17:56 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DAA026B0186; Mon, 5 Jan 2026 11:17:56 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id C7E696B017C for ; Mon, 5 Jan 2026 11:17:56 -0500 (EST) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 7AFC216013E for ; Mon, 5 Jan 2026 16:17:56 +0000 (UTC) X-FDA: 84298416552.11.90E7A5F Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf08.hostedemail.com (Postfix) with ESMTP id 8468E16000B for ; Mon, 5 Jan 2026 16:17:54 +0000 (UTC) Authentication-Results: imf08.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf08.hostedemail.com: domain of ryan.roberts@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=ryan.roberts@arm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1767629875; a=rsa-sha256; cv=none; b=bDIuGPtxur7obXJsNKLE6c/gjlJ8Dyt7yw7i+YQf5rNH06/GsbiR247IZV4WqsbPxY003u lUf41UDMxilGGUNOZXOgtXS0ks9CL2pZ7TAy/uE1qB9a3o6NvyrkfffkM0pzyAxi5mLbIz N5AT6bIny58yI9eEqB76A9fpMAaUFSI= ARC-Authentication-Results: i=1; imf08.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf08.hostedemail.com: domain of ryan.roberts@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=ryan.roberts@arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1767629875; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:references; bh=e3iWm/lYsOhP8R40mxWlclaAvDaPCSkJYGINSh44ewM=; b=VCUnHPqTcXhKGZ3Nx3IKUu0uS2drx6x3OO7MKwL77wLUMUevGZwejCbYIsqGLRtk4CqaVK 7h+BWioJc1/7QQzxgxPYd62yUcWUyYZlSHrgzF5QHdLzLHIUKxjvUDvMgfPdQnN8SJAQIL HXGChRHX9XEaPVITNDAUCNHdV3etmQM= Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 89D63339; Mon, 5 Jan 2026 08:17:46 -0800 (PST) Received: from e125769.cambridge.arm.com (e125769.cambridge.arm.com [10.1.196.27]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 840A63F6A8; Mon, 5 Jan 2026 08:17:51 -0800 (PST) From: Ryan Roberts To: Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Uladzislau Rezki , "Vishal Moola (Oracle)" Cc: Ryan Roberts , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 0/2] Free contiguous order-0 pages efficiently Date: Mon, 5 Jan 2026 16:17:36 +0000 Message-ID: <20260105161741.3952456-1-ryan.roberts@arm.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 8468E16000B X-Rspamd-Server: rspam04 X-Stat-Signature: yeywejfjha84fyy7snumn6odqbjj584h X-HE-Tag: 1767629874-817852 X-HE-Meta: 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 UQ+5Imtd G59zw+Iim6K967Ycdt/lKCErQvLfduNv8IcmJrgJWWC8LeIRRGJSU8dLIJV7mxqAoq/570OwelTlGNtTCE7oAmTHxTEV37uyZw788nnZDHJCy+asoToVr3TCSfCBQHukyXaR5z0ij77cHJ3LN3EhKvHBoRog4WxJAQfOT9cjl9NsgVLamv0AynJSd0X3+PGkWJ/vS X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi All, A recent change to vmalloc caused some performance benchmark regressions (see [1]). I'm attempting to fix that (and at the same time signficantly improve beyond the baseline) by freeing a contiguous set of order-0 pages as a batch. At the same time I observed that free_contig_range() was essentially doing the same thing as vfree() so I've fixed it there too. I think I've convinced myself that free_pages_prepare() per order-0 page followed by a single free_frozen_page_commit() or free_one_page() for the high order block is safe/correct, but would be good if a page_alloc expert can confirm! Applies against today's mm-unstable (344d3580dacd). All mm selftests run and pass. Thanks, Ryan Ryan Roberts (2): mm/page_alloc: Optimize free_contig_range() vmalloc: Optimize vfree include/linux/gfp.h | 1 + mm/page_alloc.c | 116 +++++++++++++++++++++++++++++++++++++++----- mm/vmalloc.c | 29 +++++++---- 3 files changed, 125 insertions(+), 21 deletions(-) -- 2.43.0