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=-3.8 required=3.0 tests=BAYES_00, 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 C45D9C433E6 for ; Thu, 7 Jan 2021 16:28:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9592223403 for ; Thu, 7 Jan 2021 16:28:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728776AbhAGQ2X (ORCPT ); Thu, 7 Jan 2021 11:28:23 -0500 Received: from outgoing-auth-1.mit.edu ([18.9.28.11]:34255 "EHLO outgoing.mit.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728060AbhAGQ2W (ORCPT ); Thu, 7 Jan 2021 11:28:22 -0500 Received: from cwcc.thunk.org (pool-72-74-133-215.bstnma.fios.verizon.net [72.74.133.215]) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 107GRMMv023672 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 7 Jan 2021 11:27:23 -0500 Received: by cwcc.thunk.org (Postfix, from userid 15806) id 3176915C356A; Thu, 7 Jan 2021 11:27:22 -0500 (EST) Date: Thu, 7 Jan 2021 11:27:22 -0500 From: "Theodore Ts'o" To: Russell King - ARM Linux admin Cc: Arnd Bergmann , Will Deacon , linux-toolchains@vger.kernel.org, Mark Rutland , "linux-kernel@vger.kernel.org" , Andreas Dilger , Ext4 Developers List , Linux ARM Subject: Re: Aarch64 EXT4FS inode checksum failures - seems to be weak memory ordering issues Message-ID: References: <20210105154726.GD1551@shell.armlinux.org.uk> <20210106115359.GB26994@C02TD0UTHF1T.local> <20210106135253.GJ1551@shell.armlinux.org.uk> <20210106172033.GA2165@willie-the-truck> <20210106223223.GM1551@shell.armlinux.org.uk> <20210107111841.GN1551@shell.armlinux.org.uk> <20210107124506.GO1551@shell.armlinux.org.uk> <20210107133747.GP1551@shell.armlinux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210107133747.GP1551@shell.armlinux.org.uk> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 07, 2021 at 01:37:47PM +0000, Russell King - ARM Linux admin wrote: > > The gcc bugzilla mentions backports into gcc-linaro, but I do not see > > them in my git history. > > So, do we raise the minimum gcc version for the kernel as a whole to 5.1 > or just for aarch64? Russell, Arnd, thanks so much for tracking down the root cause of the bug! I will note that RHEL 7 uses gcc 4.8. I personally don't have an objections to requiring developers using RHEL 7 to have to install a more modern gcc (since I use Debian Testing and gcc 10.2.1, myself, and gcc 5.1 is so five years ago :-), but I could imagine that being considered inconvenient for some. - Ted 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=-4.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 C0F6BC433DB for ; Thu, 7 Jan 2021 16:29:42 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 57C8522C9F for ; Thu, 7 Jan 2021 16:29:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 57C8522C9F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mit.edu Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=KjeZrcWI8kYiAp86Xy4b8/A+/X+/8Qs+0/dqq9tsqNY=; b=IoFuRI3Ip78VV6t6q/Rcg4Ms6 bvgug1egKqVQ5nV+4ATHmkNdn8qH40SGJmnlzeIUDdmRgVVrNh+r3NvnR8KxP0DLHcRnxQfEHYLEI B9YZikUjj3Y3kv66jDpPWElTPpQocc6c9WInYtZiWY+9QvS9vKy8FYodfVxIstnhOnLjFwAJe8h/d aKcj7+HcYCZHZZ5HaeE1AuhCM/eeyuIJV9i71wFoE9KdTkL5PKQ6ZySzVb9ENluXe78D7WoxWK1MN C9cFe7xqnY1YhmP2ux6VqlIYCbChpK0TI8Ir5y27vvX7L2BYD60QNxdSNJlnEFv+ogzSpZ8qUReKp RnZQCIIkw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kxY8O-0006Fs-VJ; Thu, 07 Jan 2021 16:27:37 +0000 Received: from outgoing-auth-1.mit.edu ([18.9.28.11] helo=outgoing.mit.edu) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kxY8M-0006FN-FL for linux-arm-kernel@lists.infradead.org; Thu, 07 Jan 2021 16:27:35 +0000 Received: from cwcc.thunk.org (pool-72-74-133-215.bstnma.fios.verizon.net [72.74.133.215]) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 107GRMMv023672 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 7 Jan 2021 11:27:23 -0500 Received: by cwcc.thunk.org (Postfix, from userid 15806) id 3176915C356A; Thu, 7 Jan 2021 11:27:22 -0500 (EST) Date: Thu, 7 Jan 2021 11:27:22 -0500 From: "Theodore Ts'o" To: Russell King - ARM Linux admin Subject: Re: Aarch64 EXT4FS inode checksum failures - seems to be weak memory ordering issues Message-ID: References: <20210105154726.GD1551@shell.armlinux.org.uk> <20210106115359.GB26994@C02TD0UTHF1T.local> <20210106135253.GJ1551@shell.armlinux.org.uk> <20210106172033.GA2165@willie-the-truck> <20210106223223.GM1551@shell.armlinux.org.uk> <20210107111841.GN1551@shell.armlinux.org.uk> <20210107124506.GO1551@shell.armlinux.org.uk> <20210107133747.GP1551@shell.armlinux.org.uk> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210107133747.GP1551@shell.armlinux.org.uk> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210107_112734_622979_FE5722E1 X-CRM114-Status: GOOD ( 14.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Arnd Bergmann , "linux-kernel@vger.kernel.org" , Andreas Dilger , linux-toolchains@vger.kernel.org, Ext4 Developers List , Will Deacon , Linux ARM Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jan 07, 2021 at 01:37:47PM +0000, Russell King - ARM Linux admin wrote: > > The gcc bugzilla mentions backports into gcc-linaro, but I do not see > > them in my git history. > > So, do we raise the minimum gcc version for the kernel as a whole to 5.1 > or just for aarch64? Russell, Arnd, thanks so much for tracking down the root cause of the bug! I will note that RHEL 7 uses gcc 4.8. I personally don't have an objections to requiring developers using RHEL 7 to have to install a more modern gcc (since I use Debian Testing and gcc 10.2.1, myself, and gcc 5.1 is so five years ago :-), but I could imagine that being considered inconvenient for some. - Ted _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel