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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_PASS autolearn=ham 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 66E87C43381 for ; Mon, 4 Mar 2019 10:26:47 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 3004820823 for ; Mon, 4 Mar 2019 10:26:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="KeKQYULf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3004820823 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-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=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:Reply-To:Cc:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=ONPyWQFnZESLz/drMv5588LDxJ2NxaUkeaCrlWjMjR8=; b=KeKQYULfhPCdbquNgm3ll9jns7 aBXIzlTENEJ6uVVQewyQWDkhi6/ITmapwAWItQ37/ESXw+8D1NyY8+CyObj6u4qOi0Il0ZEHgh2aV WyNseMHnEUC7QelBDAkwPkQB4bvbv/E/Ebg0KNlK6WCMbfM4hh9/Y25rXbBWgwlVbCtpO42rinyp7 9U01M/xmPBL9WYyqp6s7AAeP8gfRoXZ0OVJH2uICTTiiK292xdiQVhMQ/y2MKeKdYNV5p7bbKHHjV 8Z77FQUm391qlDCSR+NkyJZxHSYfqq3Rx/IKzancP7yKb2sJs4IrV3RhD1vY/TH5UHNBiZQ3vNd6C pKHrcBpQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h0kny-00065l-Je; Mon, 04 Mar 2019 10:26:42 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h0knv-00064w-1Y for linux-arm-kernel@lists.infradead.org; Mon, 04 Mar 2019 10:26:40 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 575D4EBD; Mon, 4 Mar 2019 02:26:36 -0800 (PST) Received: from [10.1.27.142] (e121487-lin.cambridge.arm.com [10.1.27.142]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C15843F703; Mon, 4 Mar 2019 02:26:35 -0800 (PST) Subject: Re: Unstable Kernel behavior on an ARM based board To: Embedded Engineer , linux-arm-kernel@lists.infradead.org References: <20190302110112.GA13405@1wt.eu> <20190302113651.zerdonykcvv5ex3e@shell.armlinux.org.uk> <20190302115729.zbowssfwf4j7jf22@shell.armlinux.org.uk> <20190302123907.qoe46qs6qmx7qnjs@shell.armlinux.org.uk> <453072a9-52e2-7591-750f-624ca27e0bbf@gmx.net> From: Vladimir Murzin Message-ID: Date: Mon, 4 Mar 2019 10:26:33 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190304_022639_084525_2123300E X-CRM114-Status: GOOD ( 15.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 On 3/4/19 5:14 AM, Embedded Engineer wrote: > On Sat, Mar 2, 2019 at 8:07 PM Clemens Koller wrote: >> The behaviour looks familiar to me if RAM timing is off. The memory initialization might not be suitable for your PCB design. >> You can try to exercise some in-depth memory tests from within u-boot up to the temperature extremes of your hardware, before you switch over to linux. Checkout "mtest". > > Thanks Clemens, we did consider enabling mtest in our u-boot and using > it but dropped the plan because of the description given on > https://github.com/endlessm/u-boot/blob/master/doc/README.memory-test, > specifically the following statement: > > "This is probably the best known memory test utility in U-Boot. > Unfortunately, it is also the most problematic, and the most useless > one." > You can try in-kernel memtest: - CONFIG_MEMTEST=y - pass memtest in kernel's command line Cheers Vladimir > Do you suggest board redesign is only option left? > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel