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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 27327C55189 for ; Wed, 22 Apr 2020 11:36:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D53E320784 for ; Wed, 22 Apr 2020 11:36:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="r3V2XHXq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726863AbgDVLgv (ORCPT ); Wed, 22 Apr 2020 07:36:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726517AbgDVLgv (ORCPT ); Wed, 22 Apr 2020 07:36:51 -0400 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:3201:214:fdff:fe10:1be6]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1B5FC03C1A8 for ; Wed, 22 Apr 2020 04:36:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=DChLa/dPBSszzKMIV61f+9s61HKeSO67ObxSI6JlPU8=; b=r3V2XHXqI6RG5O+1BgLr3gSap hyx2fsVOKps1Kn2fQjSbmo468UxGjQJ4dawkeVHzd7n7L/8nzG+iCSYFPjFKoV0f63v29Us0zsCjb u+BJN0M6ZyRmCMRNyUpvgb/i/xsDx43MWMIhkYljBf+qp2z/QMZsMluPIU3ad/8r5280VCDNCrKTi XVLGe7JZ9g7ZsXOqPDdHX+QSahrkWfr2UkXNloROBhvzFgRc4JX5o5WzteVpFqY/atfW/pRhW0JWV VILml7ApKHZqKf/Rf6YIthDZRJ+OiBPw6cMzPfDlORcL4HunRPnJF/GdJponAnKmADiJQvTG0nZVK vU3uTfqAQ==; Received: from shell.armlinux.org.uk ([2002:4e20:1eda:1:5054:ff:fe00:4ec]:49576) by pandora.armlinux.org.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jRDgF-0007qA-Ao; Wed, 22 Apr 2020 12:36:39 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1jRDg7-00087J-L4; Wed, 22 Apr 2020 12:36:31 +0100 Date: Wed, 22 Apr 2020 12:36:31 +0100 From: Russell King - ARM Linux admin To: alpha_one_x86 , huziji@marvell.com, linux-mmc@vger.kernel.org, ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: linux-arm-kernel@lists.infradead.org Subject: Re: 2 bug repport Message-ID: <20200422113631.GN25745@shell.armlinux.org.uk> References: <408ebea1-725d-2f8e-7d26-a2cb4d7754d3@first-world.info> <20200422082836.GL25745@shell.armlinux.org.uk> <5a67104f-1286-2cb0-d01e-8aa61c9f7e48@first-world.info> <20200422111025.GM25745@shell.armlinux.org.uk> <50004568-09e5-719b-ec4a-c09882767a6a@first-world.info> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <50004568-09e5-719b-ec4a-c09882767a6a@first-world.info> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Adding back those who *need* to be copied. Please be more careful with your replies. As I said, those others are for your benefit, not for mine, as they are more likely going to be able to help you. Thanks for confirming that it is indeed a regression with 5.6 kernels. Over to the Adrian/Ulf/others now... On Wed, Apr 22, 2020 at 07:15:18AM -0400, alpha_one_x86 wrote: > Hi, > > On multiple hardware I had tested 4.20, 5.6.6, again 4.20, 5.6.6, again > 4.20. > > The problem is only with 5.6.6, never with 4.20 > > On 2020-04-22 07:10, Russell King - ARM Linux admin wrote: > > On Wed, Apr 22, 2020 at 07:00:11AM -0400, alpha_one_x86 wrote: > > > Hi, > > > > > > It's regression because on the kernel 4.20 all is working. > > PLEASE do not drop the Cc list. The Cc list is for YOUR benefit. > > > > You can't say that without going back and checking. > > > > SD cards are flash media, and they fail in weird and stupid ways. > > Flash media itself only has a limited number of write cycles before > > the memory irrevocerably fails. SD cards have firmware on them to > > manage the flash media to perform wear leveling. Firmware can be > > buggy and cause problems. I've had SD cards become completely > > inaccessible because of a firmware failure. > > > > So, after finding a problem on a later kernel with SD cards, you > > need to confirm the regression by checking whether the previously > > working kernel continues to behave correctly (indicating a kernel > > regression) or whether it behaves the same (indicating a failure of > > the SD card.) > > > > If you're not willing to do that, I'm afraid we will have to discount > > your bug report since it doesn't contain the information necessary to > > make a proper evaluation of what may be going on. > > > > > Cheers, > > > > > > On 2020-04-22 04:28, Russell King - ARM Linux admin wrote: > > > > On Wed, Apr 22, 2020 at 03:03:57AM -0400, alpha_one_x86 wrote: > > > > > Hi, > > > > > > > > > > On mcbin platform I have uSD problem, repported but no reply on linux kernel > > > > > bugzilla, https://bugzilla.kernel.org/show_bug.cgi?id=207083 > > > > > > > > > > Any idea what patch try? > > > > I think that's a question for the MMC people. > > > > > > > > If you go back to your working 4.20 kernel, does the problem go away? > > > > If so, it sounds like a regression in the MMC subsystem. If not, I > > > > wonder if it could be the uSD card going bad. > > > > > > > > However, I suspect the former. I've seen one instance here where a > > > > Clearfog GT8k (Armada 8040 based just like the mcbin) running 5.6 with > > > > the rootfs on eMMC completely lost the ability to talk to the eMMC to > > > > the point that the machine had to be power cycled to recover it - > > > > merely rebooting did not. I don't know the cause - the initial failure > > > > had vanished from the kernel logs, and because the eMMC was no longer > > > > accessible, the rsyslog files did not contain the details either. > > > > I've since setup remote logging, and I'm currently waiting for it to > > > > happen again. I couldn't say if _that_ is a regression because I > > > > haven't been using the GT8k until very recently, and I tend not to use > > > > eMMC/uSD on the Macchiatobin that runs 24x7. > > > > > > > -- > > > alpha_one_x86/BRULE Herman > > > Main developer of Supercopier/Ultracopier/CatchChallenger, Esourcing and server management > > > IT, OS, technologies, research & development, security and business department > > > > -- > alpha_one_x86/BRULE Herman > Main developer of Supercopier/Ultracopier/CatchChallenger, Esourcing and server management > IT, OS, technologies, research & development, security and business department > -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up 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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 6A8B9C55185 for ; 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Wed, 22 Apr 2020 12:36:39 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1jRDg7-00087J-L4; Wed, 22 Apr 2020 12:36:31 +0100 Date: Wed, 22 Apr 2020 12:36:31 +0100 From: Russell King - ARM Linux admin To: alpha_one_x86 , huziji@marvell.com, linux-mmc@vger.kernel.org, ulf.hansson@linaro.org, adrian.hunter@intel.com Subject: Re: 2 bug repport Message-ID: <20200422113631.GN25745@shell.armlinux.org.uk> References: <408ebea1-725d-2f8e-7d26-a2cb4d7754d3@first-world.info> <20200422082836.GL25745@shell.armlinux.org.uk> <5a67104f-1286-2cb0-d01e-8aa61c9f7e48@first-world.info> <20200422111025.GM25745@shell.armlinux.org.uk> <50004568-09e5-719b-ec4a-c09882767a6a@first-world.info> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <50004568-09e5-719b-ec4a-c09882767a6a@first-world.info> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200422_043657_403998_3076D6DD X-CRM114-Status: GOOD ( 27.64 ) 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: linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Adding back those who *need* to be copied. Please be more careful with your replies. As I said, those others are for your benefit, not for mine, as they are more likely going to be able to help you. Thanks for confirming that it is indeed a regression with 5.6 kernels. Over to the Adrian/Ulf/others now... On Wed, Apr 22, 2020 at 07:15:18AM -0400, alpha_one_x86 wrote: > Hi, > > On multiple hardware I had tested 4.20, 5.6.6, again 4.20, 5.6.6, again > 4.20. > > The problem is only with 5.6.6, never with 4.20 > > On 2020-04-22 07:10, Russell King - ARM Linux admin wrote: > > On Wed, Apr 22, 2020 at 07:00:11AM -0400, alpha_one_x86 wrote: > > > Hi, > > > > > > It's regression because on the kernel 4.20 all is working. > > PLEASE do not drop the Cc list. The Cc list is for YOUR benefit. > > > > You can't say that without going back and checking. > > > > SD cards are flash media, and they fail in weird and stupid ways. > > Flash media itself only has a limited number of write cycles before > > the memory irrevocerably fails. SD cards have firmware on them to > > manage the flash media to perform wear leveling. Firmware can be > > buggy and cause problems. I've had SD cards become completely > > inaccessible because of a firmware failure. > > > > So, after finding a problem on a later kernel with SD cards, you > > need to confirm the regression by checking whether the previously > > working kernel continues to behave correctly (indicating a kernel > > regression) or whether it behaves the same (indicating a failure of > > the SD card.) > > > > If you're not willing to do that, I'm afraid we will have to discount > > your bug report since it doesn't contain the information necessary to > > make a proper evaluation of what may be going on. > > > > > Cheers, > > > > > > On 2020-04-22 04:28, Russell King - ARM Linux admin wrote: > > > > On Wed, Apr 22, 2020 at 03:03:57AM -0400, alpha_one_x86 wrote: > > > > > Hi, > > > > > > > > > > On mcbin platform I have uSD problem, repported but no reply on linux kernel > > > > > bugzilla, https://bugzilla.kernel.org/show_bug.cgi?id=207083 > > > > > > > > > > Any idea what patch try? > > > > I think that's a question for the MMC people. > > > > > > > > If you go back to your working 4.20 kernel, does the problem go away? > > > > If so, it sounds like a regression in the MMC subsystem. If not, I > > > > wonder if it could be the uSD card going bad. > > > > > > > > However, I suspect the former. I've seen one instance here where a > > > > Clearfog GT8k (Armada 8040 based just like the mcbin) running 5.6 with > > > > the rootfs on eMMC completely lost the ability to talk to the eMMC to > > > > the point that the machine had to be power cycled to recover it - > > > > merely rebooting did not. I don't know the cause - the initial failure > > > > had vanished from the kernel logs, and because the eMMC was no longer > > > > accessible, the rsyslog files did not contain the details either. > > > > I've since setup remote logging, and I'm currently waiting for it to > > > > happen again. I couldn't say if _that_ is a regression because I > > > > haven't been using the GT8k until very recently, and I tend not to use > > > > eMMC/uSD on the Macchiatobin that runs 24x7. > > > > > > > -- > > > alpha_one_x86/BRULE Herman > > > Main developer of Supercopier/Ultracopier/CatchChallenger, Esourcing and server management > > > IT, OS, technologies, research & development, security and business department > > > > -- > alpha_one_x86/BRULE Herman > Main developer of Supercopier/Ultracopier/CatchChallenger, Esourcing and server management > IT, OS, technologies, research & development, security and business department > -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel