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=-6.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 B2853C433DB for ; Thu, 7 Jan 2021 17:02:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 82A5022C9F for ; Thu, 7 Jan 2021 17:02:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728684AbhAGRB4 (ORCPT ); Thu, 7 Jan 2021 12:01:56 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:31993 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726650AbhAGRB4 (ORCPT ); Thu, 7 Jan 2021 12:01:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610038829; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=uHtLQ82irY0zw9G0AL7ymoS/HHVkiUCAdKjz4xIDFCA=; b=XXFHgC33NOxSV0tGfCSs4d+naQRzz8XHSNcVgEfCZZd9P8c3adOqfCNYZfPZay3jQTaac2 xDYVf3b8/qkGsIsieTEu5zsXUG56SFsYb3oBoY9jGuOfBCEiyveOw1une7GkK9B9tbl81E ZlfUULIWgyq5G9m+i7ed3kt0mRa6/us= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-172-tA9k7NiUM0q06iIHy0qyAg-1; Thu, 07 Jan 2021 12:00:27 -0500 X-MC-Unique: tA9k7NiUM0q06iIHy0qyAg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E9084107ACE3; Thu, 7 Jan 2021 17:00:25 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-114-198.ams2.redhat.com [10.36.114.198]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 57E6C19C81; Thu, 7 Jan 2021 17:00:23 +0000 (UTC) From: Florian Weimer To: "Theodore Ts'o" Cc: Russell King - ARM Linux admin , 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 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> Date: Thu, 07 Jan 2021 18:00:21 +0100 In-Reply-To: (Theodore Ts'o's message of "Thu, 7 Jan 2021 11:27:22 -0500") Message-ID: <87r1mwy95m.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Theodore Ts'o: > 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. Actually, RHEL 7 should have the fix (internal bug #1362635, curiously we encountered it in the *XFS* CRC calculation code back then). My understanding is that RHEL 7 aarch64 support ceased completely about a month ago, so that shouldn't be an argument against bumping the minimum version requirement to 5.1. Thanks, Florian -- Red Hat GmbH, https://de.redhat.com/ , Registered seat: Grasbrunn, Commercial register: Amtsgericht Muenchen, HRB 153243, Managing Directors: Charles Cachera, Brian Klemm, Laurie Krebs, Michael O'Neill 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 A5A23C433DB for ; Thu, 7 Jan 2021 17:02:52 +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 5D89222C9F for ; 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Thu, 07 Jan 2021 12:00:27 -0500 X-MC-Unique: tA9k7NiUM0q06iIHy0qyAg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E9084107ACE3; Thu, 7 Jan 2021 17:00:25 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-114-198.ams2.redhat.com [10.36.114.198]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 57E6C19C81; Thu, 7 Jan 2021 17:00:23 +0000 (UTC) From: Florian Weimer To: "Theodore Ts'o" Subject: Re: Aarch64 EXT4FS inode checksum failures - seems to be weak memory ordering issues 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> Date: Thu, 07 Jan 2021 18:00:21 +0100 In-Reply-To: (Theodore Ts'o's message of "Thu, 7 Jan 2021 11:27:22 -0500") Message-ID: <87r1mwy95m.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210107_120034_185858_31795EA7 X-CRM114-Status: GOOD ( 20.44 ) 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 , Russell King - ARM Linux admin , "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 * Theodore Ts'o: > 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. Actually, RHEL 7 should have the fix (internal bug #1362635, curiously we encountered it in the *XFS* CRC calculation code back then). My understanding is that RHEL 7 aarch64 support ceased completely about a month ago, so that shouldn't be an argument against bumping the minimum version requirement to 5.1. Thanks, Florian -- Red Hat GmbH, https://de.redhat.com/ , Registered seat: Grasbrunn, Commercial register: Amtsgericht Muenchen, HRB 153243, Managing Directors: Charles Cachera, Brian Klemm, Laurie Krebs, Michael O'Neill _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel