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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B837CC31E40 for ; Fri, 9 Aug 2019 22:17:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7845F2166E for ; Fri, 9 Aug 2019 22:17:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="M0Yq6MHA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7845F2166E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E91EA6B0005; Fri, 9 Aug 2019 18:17:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E43246B0006; Fri, 9 Aug 2019 18:17:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D31146B0007; Fri, 9 Aug 2019 18:17:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-pf1-f200.google.com (mail-pf1-f200.google.com [209.85.210.200]) by kanga.kvack.org (Postfix) with ESMTP id 9C6AF6B0005 for ; Fri, 9 Aug 2019 18:17:21 -0400 (EDT) Received: by mail-pf1-f200.google.com with SMTP id 145so62350626pfv.18 for ; Fri, 09 Aug 2019 15:17:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:date:from:to:cc:subject :message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=UBTRxGqqf4dX5g2SlS3jqNIddApVyXkNPQNLT2Ez+0U=; b=M2gJDp0lW13dmycLRSzH3fRmZULGhmRpy6KSvzTikjes+5NvpZ3ouxOtUcFmO3eSfq 7hp8kzL279g2cLjhYQSxV99naRzrq6OgGwPWL+sDBscBQhZCZNuwjwFyLaO7nAscsbtI Lsqf/z4EsmR/+lzUecjCeZpT3p6tMJABvjW3S22r4jR6+77T0ffNiGeeWBqm54tRer9G pFsfsvCHKervBc2zruDpmkQnigqRnXRzlLs4XXdSyAgf2ENLLTA0KTD16U/1NjiIeFV0 RgaKTW0URcaJK10u1/iTBt5cFhqW5jVwlZ+60JrJ0hwdJ/6F3zfaF6GeXY95m7nmxcES nxQQ== X-Gm-Message-State: APjAAAWQkEr/box4U04NX40q/J8qyk+Jfmv5gmBCesfQ26FBe+MvRljf GEXW9MHO7HXg86knkxYvC2JL4cQy+qN3jgxty/5KHkiOcwMgM1ZaMbF85W5AVklnTJCwVWDpBcZ dXvcAJ+gNOfH2a97s3U3UOz5VOQKpBODI0F54yXmXc3uiF613aRKkJUbhsXfm5UETog== X-Received: by 2002:a17:902:be12:: with SMTP id r18mr20238643pls.341.1565389041286; Fri, 09 Aug 2019 15:17:21 -0700 (PDT) X-Google-Smtp-Source: APXvYqyrC8AO8q9Jj2qWXPRz2TlR5+ZSM72dhhZ9wB0jjC3Vtqm01RIoJp7r/xvfjTLhxbcPLPTJ X-Received: by 2002:a17:902:be12:: with SMTP id r18mr20238588pls.341.1565389040186; Fri, 09 Aug 2019 15:17:20 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1565389040; cv=none; d=google.com; s=arc-20160816; b=L8YiVCdxI1lfpLuTwPzTsJa3V3XGGQ+tWjgt8qsPccyAknxiB+e7V39bRpM/rruQJG AiNGZtq3irNu3S4Rod9PuxAjaGFlx7H3VwhiamtsBJuKVu/k2tv1/nfWaLkqnmzGeR1K kIKZ9ZR5eZO8fhBjyx2NvGgZ3zFCYy1DZ79rlR8aWZ4u3nL2+Lw29Pg+o8q9M35JoTCH TN45ar0+xs1UR2xIGL/DP6ul5MiZAvVFMxyEnio6ogqtF47T7gzh1P+btWvdi04zTaYu pqVuc5PVUistw+5UCwZNIrEvvPyZTOomfBfSyoDQD0JqUCstrGloh9GRoUdpaH2ccfpY epPg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:dkim-signature; bh=UBTRxGqqf4dX5g2SlS3jqNIddApVyXkNPQNLT2Ez+0U=; b=oe9TsiU9V4gfef4kteTKSFZSmuBFWi6wWr8FOxQI16KT8MlCMzmRSp5JDDQKMAhqNs EwWcbX17wYrWOBowjWyBDNdEHClVbgkZVTYihCqjcrlirseNB17/ALP69Jd9CLaEz6Fc QhjG+ZEvWvnPLUpPqx8jgCPqqaqxcASjLZEQ8lPcfcq0kPGufHc9iOF+kwwi95HgUIdh 4oFugmNg3RuaiET4O8ZwhDGljykdC9+b8sKl4mOnEcXojsKSkxCwKySd/kijDfgdBuTM 58ZkQjj8SvcMIDeRCsytrIzLze/rXx/MLjfK4G3qNl4mgPF3BnBgNh4iKD54B1Lm/jIU KM7Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=M0Yq6MHA; spf=pass (google.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org Received: from mail.kernel.org (mail.kernel.org. [198.145.29.99]) by mx.google.com with ESMTPS id s24si3444131pgq.372.2019.08.09.15.17.20 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 09 Aug 2019 15:17:20 -0700 (PDT) Received-SPF: pass (google.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) client-ip=198.145.29.99; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=M0Yq6MHA; spf=pass (google.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org Received: from akpm3.svl.corp.google.com (unknown [104.133.8.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8646B20C01; Fri, 9 Aug 2019 22:17:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565389039; bh=sBCc7FSNFhlnRsGYMaaCt24naPV+9JGWf4SdSDBpZSQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=M0Yq6MHAY53t1ncV64OxCpQqedn+WGq7kUdkHQs/u4ha4+lqiISH5b3bRrmIog8Wt o8ciIYK8TbwhCQwuiXofvHPxI9UqaGaq0sdOWGr5Xetzut3rRRFlbp/2r5gMkvzC1m KsxqJdOSCt+CD15CCLeCix6toLaH2Y6YVAvmk3DQ= Date: Fri, 9 Aug 2019 15:17:18 -0700 From: Andrew Morton To: Michal Hocko Cc: Mike Kravetz , linux-mm@kvack.org, linux-kernel@vger.kernel.org, ltp@lists.linux.it, Li Wang , Naoya Horiguchi , Cyril Hrubis , xishi.qiuxishi@alibaba-inc.com, Sasha Levin Subject: Re: [PATCH] hugetlbfs: fix hugetlb page migration/fault race causing SIGBUS Message-Id: <20190809151718.d285cd1f6d0f1cf02cb93dc8@linux-foundation.org> In-Reply-To: <20190809064633.GK18351@dhcp22.suse.cz> References: <20190808000533.7701-1-mike.kravetz@oracle.com> <20190808074607.GI11812@dhcp22.suse.cz> <20190808074736.GJ11812@dhcp22.suse.cz> <416ee59e-9ae8-f72d-1b26-4d3d31501330@oracle.com> <20190808185313.GG18351@dhcp22.suse.cz> <20190808163928.118f8da4f4289f7c51b8ffd4@linux-foundation.org> <20190809064633.GK18351@dhcp22.suse.cz> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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: On Fri, 9 Aug 2019 08:46:33 +0200 Michal Hocko wrote: > > Maybe we should introduce the Fixes-no-stable: tag. That should get > > their attention. > > No please, Fixes shouldn't be really tight to any stable tree rules. It > is a very useful indication of which commit has introduced bug/problem > or whatever that the patch follows up to. We in Suse are using this tag > to evaluate potential fixes as the stable is not reliable. We could live > with Fixes-no-stable or whatever other name but does it really makes > sense to complicate the existing state when stable maintainers are doing > whatever they want anyway? Does a tag like that force AI from selecting > a patch? I am not really convinced. It should work if we ask stable trees maintainers not to backport such patches. Sasha, please don't backport patches which are marked Fixes-no-stable: and which lack a cc:stable tag.