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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 64C3DC71136 for ; Fri, 18 Aug 2023 06:07:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357990AbjHRGGl (ORCPT ); Fri, 18 Aug 2023 02:06:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357999AbjHRGGL (ORCPT ); Fri, 18 Aug 2023 02:06:11 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9F413A99 for ; Thu, 17 Aug 2023 23:05:59 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 63DF763C7B for ; Fri, 18 Aug 2023 06:05:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 64765C433C7; Fri, 18 Aug 2023 06:05:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692338758; bh=n3BpoIeXq9CIvchSKrnmLWQgVA9pvqrLHqMRQFzVdPM=; h=From:Subject:Date:To:Cc:From; b=qf6UYoy4G2GFHC+FPZaU6nW5AW6/PaBH31SVWSJYJuhaqcz7kM98evR3UgnTRSvg+ P7J25H25cjWWjZ2VhobHehDhYHip9S+h7x5eqG21ZfX0AgPJ0rtORj+Slfqr6yDld7 BRe3hylKMZymiiMxU+D18Ywo2uR837j9htNLywdhYRaeXOe89+D2PRsrz58xhHLJSb AkKDgAC7eChRLps+5OBOws9Qx4H+VKxR14Vwk3dznINlpPqKciTQunaZ7ZwUdO8tuu nxDABbxQMRoH4rf7H0Yrqc616qIqYFAu4naHvmxIZ/h4fSgN+HxwlkG2lu4CVK3409 N+RFoIkhD0iZQ== From: Chris Li Subject: [PATCH RFC 0/2] mm/page_alloc: free_pcppages_bulk safeguard Date: Thu, 17 Aug 2023 23:05:22 -0700 Message-Id: <20230817-free_pcppages_bulk-v1-0-c14574a9f80c@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIACMK32QC/x2NQQqDMBQFryJ/3YCxUKXbQg/QbSnyE180VGPIr 1IQ797Y5TAMs5EgeQhdi40SVi9+Dhn0qSA7cOihfJeZqrI6l42ulUtAG22M3ENas4xv5dha3XQ XB9SUQ8MCZRIHOxzpNCn5sBlxuJjg/Pc/fNLjfqPXvv8AU1Y79oUAAAA= To: Andrew Morton , Kemeng Shi Cc: akpm@linux-foundation.org, baolin.wang@linux.alibaba.com, mgorman@techsingularity.net, Michal Hocko , david@redhat.com, willy@infradead.org, linux-mm@kvack.org, Namhyung Kim , Greg Thelen , linux-kernel@vger.kernel.org, Chris Li , John Sperbeck X-Mailer: b4 0.12.2 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In this patch series I want to safeguard the free_pcppage_bulk against change in the pcp->count outside of this function. e.g. by BPF program inject on the function tracepoint. I break up the patches into two seperate patches for the safeguard and clean up. Hopefully that is easier to review. Signed-off-by: Chris Li --- Chris Li (2): mm/page_alloc: safeguard free_pcppages_bulk mm/page_alloc: free_pcppages_bulk clean up mm/page_alloc.c | 44 +++++++++++++------------------------------- 1 file changed, 13 insertions(+), 31 deletions(-) --- base-commit: 5fb2ea3111f4ecc6dc4891ce5b00f0217aae9a04 change-id: 20230817-free_pcppages_bulk-facc18d6fee7 Best regards, -- Chris Li