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_MED,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 7FCE2C07E85 for ; Thu, 29 Nov 2018 17:11:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 472FA20863 for ; Thu, 29 Nov 2018 17:11:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="zbjqn2NX" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 472FA20863 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730439AbeK3ERC (ORCPT ); Thu, 29 Nov 2018 23:17:02 -0500 Received: from mail-it1-f193.google.com ([209.85.166.193]:37626 "EHLO mail-it1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728362AbeK3ERB (ORCPT ); Thu, 29 Nov 2018 23:17:01 -0500 Received: by mail-it1-f193.google.com with SMTP id b5so4805577iti.2 for ; Thu, 29 Nov 2018 09:10:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=509fG5ohW0ABAHddsQVvEAUx3iqSoPz8t3CRL4oZu+0=; b=zbjqn2NXiUU5F/wbdNdZPpSgPc2cV36l0Axm+1tzGlshg07I+PK+iOMGRB2f06sZZK ZM/5uAsbnqSQbu3gdWRy3ZUMrFVHbDvsnXzsIDG3n2F6R5sqRGogOM9nL5laAxrdXKIN aj5ahnXNP/insuVrL4+IpNFeK5g65M0VxMXH0RQLGwK7Vslf1HKxRMo0H/k8T0cLkS9K Qq8JNKN0RatWksm0GoAV5ix0wWNlfSBXOj5t7oYMO4+t9Fx2as1GJ2kgROwwE7Qj/ab3 qzjb15F53eT11PgcPnpLJi54UK5iX2vuUZXrmiXTAUGwSB3y3aiSII/0QQSjWNycutxQ HPbg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=509fG5ohW0ABAHddsQVvEAUx3iqSoPz8t3CRL4oZu+0=; b=sPg7ds8DNWq5yOnt0VdrxliDq4dXbD3fTRJ+bXerRsrEXSwVqqf6UiOEwCgCl56cY5 cD844TjkoRPxJRkSDN0YMlcZW+dkcJlw3I+EnEzcbSLhS4Q7FJX4ThOqFMSOQSs+baie 7dKbTPZvDit4tHJtUupTMqzfE00mhCiItl+OtqhLMzXTPbBZkv0/D/c8YKvLsUc1hzOH LeDVoyUazg4f6GPeDR4sbE8BKcKf1sXlOftkrpy2NVg2mwLmcuHyst6Sk8ohLeki8bn8 SNtQdrur/2sQNsRdxgfNZHfyx1Gj6U7JksXCssIa79qJvgW7fiVuQmYGacIX/tKUzesJ r8Ag== X-Gm-Message-State: AA+aEWbTUY7GSowtfRpkxL3iwzef9k5HverQ7/kwfwGqJ8B7uNd14R9M bt20xGhYmFF6jFE+vPa3rcs9kg== X-Google-Smtp-Source: AFSGD/WzBTigcgiAWbi4E4fkWzUKOACs1rlJFDtdpHkIRN0EDWaUUGSVbiDvYoAXJMrFZMC4vu+QJw== X-Received: by 2002:a02:7e95:: with SMTP id g21mr1932112jae.114.1543511457266; Thu, 29 Nov 2018 09:10:57 -0800 (PST) Received: from [192.168.1.56] ([216.160.245.98]) by smtp.gmail.com with ESMTPSA id k4sm899605ion.61.2018.11.29.09.10.55 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 29 Nov 2018 09:10:56 -0800 (PST) Subject: Re: [LKP] [block] 9d037ad707: BUG:unable_to_handle_kernel To: Christoph Hellwig , kernel test robot Cc: LKML , Jens Axboe , lkp@01.org References: <20181129092031.GF21676@shao2-debian> <20181129170535.GA28147@lst.de> From: Jens Axboe Message-ID: Date: Thu, 29 Nov 2018 10:10:55 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <20181129170535.GA28147@lst.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/29/18 10:05 AM, Christoph Hellwig wrote: > On Thu, Nov 29, 2018 at 05:20:31PM +0800, kernel test robot wrote: >> FYI, we noticed the following commit (built with gcc-7): >> >> commit: 9d037ad707ed6069fbea4e38e6ee37e027b13f1d ("block: remove req->timeout_list") >> https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git mq-perf > > This looks very odd. How could we introduce a new BUG with the removal > of an unused structure member? Someone else reported a t10 pi issue, I'm guessing it's a latent bug and the struct size changing is causing it to trigger weirdly on this one. That's the only explanation, as it can't possibly be this specific commit. -- Jens Axboe