Received: by 2002:a05:6358:4e97:b0:b3:742d:4702 with SMTP id ce23csp4438763rwb; Tue, 16 Aug 2022 23:04:42 -0700 (PDT) X-Google-Smtp-Source: AA6agR5SjzQxFLx1j3CAPBHPeKEwrG795ZdCJxOJ8GnbI8+dBviRgW+Gv/M9BVLZlqxPDq4VnTdU X-Received: by 2002:a05:6a00:23d3:b0:52e:27c8:b8f3 with SMTP id g19-20020a056a0023d300b0052e27c8b8f3mr24083489pfc.43.1660716281788; Tue, 16 Aug 2022 23:04:41 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1660716281; cv=none; d=google.com; s=arc-20160816; b=rr8KjWElvY0ZvdXSQiVJCu3T1yjoF7zL1rSWwAQxw6+rDyFgs7LBIpUrUvi901cP1t ztlyDKv7SR9tLNJhk3+7wXO9ag480qKgyK5+tAwi2MYVHSiqh1ORpIaz8duXflbIy5dN i5u78ovZsIaBoPsR/Rv4w69WEyT0tLbQlujOFhuH61UVmkV14GYV759fpKx2yxZtRGiw ISIpMVwnt6W6NFb2YNfaWyrKje3KNOfJ1hKHHNksYUCWMq+7ZCnq7OlczQO/pSK3PDyC 3sc4PGuXPwZI9M68ptA92yymYOweN5wy50o9HTTdxJXFOnYTWN/OYbhOwEbLCPFaNV4o PkeA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date :dkim-signature; bh=RZgo6sxETuiLbGeP2iSOoeMKtQ0r8HZXX4wfThKgySM=; b=xGxyfeGlGl54RqvB9cq6hJqbMjLdkMItjEIihdYlK1tNL5a/tAlfkr+uY/DgOeRuaI hKnTPdzB91ZPOjkL3wq2TPLARVLJRen4uFNbJoAxOS01VT//QVsHqKbchq3WbtCd7OQO IWDYCRt17pC5Xd7Fwj2waTcFDoaZ7loykCcd0qzv6iJNWd+V14fygAlnvNQd3t49f8/8 axFUUeOup9o2FAy78wYoHgm+srk+8J62d/oA6En29NQLIZM5EV4MKEy8A+aJjs1hBOBo ZqBpfcgm8HKIcML572ImKBO9EIFbz7glnEHVaqVmFJSleMecuxa0YHKB/BrUtbrI8YaI rpPQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linux-foundation.org header.s=korg header.b=iHLU9TKR; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id b18-20020a17090a551200b001ea91760f6esi968531pji.79.2022.08.16.23.04.30; Tue, 16 Aug 2022 23:04:41 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linux-foundation.org header.s=korg header.b=iHLU9TKR; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238574AbiHQFn3 (ORCPT + 99 others); Wed, 17 Aug 2022 01:43:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238570AbiHQFn1 (ORCPT ); Wed, 17 Aug 2022 01:43:27 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 662B378585 for ; Tue, 16 Aug 2022 22:43:26 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 0900BB81AD3 for ; Wed, 17 Aug 2022 05:43:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 314BAC433C1; Wed, 17 Aug 2022 05:43:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1660715003; bh=eO0iTKHSzV5zu2OW1AHPVACUhzexWpCHKWbHsLA3IyE=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=iHLU9TKRjJwKkO5OE7I/ksAsyI6BY+LMp3cx1Q1cEP8beB2C4rA8Xn/U1TEMbLGWl wb77SXwP7DeBWpQIh1u4ML6uVyeTU9RHGVZLUgDDPsQf2grtXQjcrFLQUrAX3PcI9/ sgfKzwSStjyTLI8rYImkTntzXfNiQDBKfDWWF3KQ= Date: Tue, 16 Aug 2022 22:43:22 -0700 From: Andrew Morton To: "Wang, Haiyue" Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "david@redhat.com" , "apopple@nvidia.com" , "linmiaohe@huawei.com" , "Huang, Ying" , "songmuchun@bytedance.com" , "naoya.horiguchi@linux.dev" , "alex.sierra@amd.com" , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Mike Kravetz Subject: Re: [PATCH v6 1/2] mm: migration: fix the FOLL_GET failure on following huge page Message-Id: <20220816224322.33e0dfbcbf522fcdc2026f0e@linux-foundation.org> In-Reply-To: References: <20220812084921.409142-1-haiyue.wang@intel.com> <20220816022102.582865-1-haiyue.wang@intel.com> <20220816022102.582865-2-haiyue.wang@intel.com> <20220816175838.211a1b1e85bc68c439101995@linux-foundation.org> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 17 Aug 2022 03:31:37 +0000 "Wang, Haiyue" wrote: > > > } > > > > I would be better to fix this for real at those three client code sites? > > Then 5.19 will break for a while to wait for the final BIG patch ? If that's the proposal then your [1/2] should have had a cc:stable and changelog words describing the plan for 6.0. But before we do that I'd like to see at least a prototype of the final fixes to s390 and hugetlb, so we can assess those as preferable for backporting. I don't think they'll be terribly intrusive or risky?