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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,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 555CFC48BE0 for ; Fri, 11 Jun 2021 15:58:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2FF34613EA for ; Fri, 11 Jun 2021 15:58:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230155AbhFKQAa (ORCPT ); Fri, 11 Jun 2021 12:00:30 -0400 Received: from mail-pf1-f180.google.com ([209.85.210.180]:44673 "EHLO mail-pf1-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229935AbhFKQA3 (ORCPT ); Fri, 11 Jun 2021 12:00:29 -0400 Received: by mail-pf1-f180.google.com with SMTP id u18so4776094pfk.11 for ; Fri, 11 Jun 2021 08:58:31 -0700 (PDT) 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=HkaVMicttHWpif94nSMHfmpNValFfWFmY2lqzd1F/tM=; b=iVWSscEg9lP/TSFaYNPBDglj9ekDVC8jkpVOtAp7uNlYHkiiDfc+7sUvF+0q9dAox+ kiadnEz4k8XsOpxqXVwt5+y98CN45p4Io+29DOHjnKIEGPUqofCFXrCRCz7GSydQvPUo uP8/NiivHAqAXtYejbkV/wJ1Hmz56Zi+YWWOrxrVBazQcZCWXksru80VlmSK4EOl+hwc o6MMUDUvvF2min26VPYLNbkUr4y+/3z2sq1x6D0SIeUPOmJKRC/yGWwHbbAcoOYll2mG vSecGnxRvviDFmfJxzNPV46oagqOsEugJUkuB/9xOjqSzLKROCDZ8R9mCr/wzST0ajtT 61ZA== X-Gm-Message-State: AOAM530tRDM5ILhYTZ++drgYbld9vdrxi8lXXWtvmKRvr/M5LCcQ5WGW 6omlGkUa86acNEFI4xa4XR8= X-Google-Smtp-Source: ABdhPJybmppigp3NJuIk1u7epBR3fkml9Rml1nWXfhdshQIWpWfdGiO30eVbOLQTOdQv5p5vDW1rrg== X-Received: by 2002:aa7:921a:0:b029:2cf:b55b:9d52 with SMTP id 26-20020aa7921a0000b02902cfb55b9d52mr8642367pfo.35.1623427111236; Fri, 11 Jun 2021 08:58:31 -0700 (PDT) Received: from [192.168.3.217] (c-73-241-217-19.hsd1.ca.comcast.net. [73.241.217.19]) by smtp.gmail.com with ESMTPSA id v15sm6034254pgf.26.2021.06.11.08.58.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 11 Jun 2021 08:58:30 -0700 (PDT) Subject: Re: [block/mq] 2aa18c32fd: WARNING:at_block/mq-deadline-main.c:#dd_insert_requests To: kernel test robot Cc: Damien Le Moal , Hannes Reinecke , Christoph Hellwig , Ming Lei , Johannes Thumshirn , Himanshu Madhani , LKML , lkp@lists.01.org, lkp@intel.com References: <20210611070434.GA26476@xsang-OptiPlex-9020> From: Bart Van Assche Message-ID: <3e58f0b5-3dbe-b38a-ea2f-2399f5a451f5@acm.org> Date: Fri, 11 Jun 2021 08:58:28 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.2 MIME-Version: 1.0 In-Reply-To: <20210611070434.GA26476@xsang-OptiPlex-9020> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/11/21 12:04 AM, kernel test robot wrote: > caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): In the dmesg output I found the following: kern :warn : [ 100.174333] WARNING: CPU: 0 PID: 1055 at block/mq-deadline-main.c:714 dd_insert_requests+0x1b5/0x300 kern :warn : [ 100.521569] WARNING: CPU: 0 PID: 1055 at block/mq-deadline-main.c:474 dd_dispatch_request+0x280/0x380 So these warnings are triggered by: #if defined(CONFIG_BLK_CGROUP) WARN_ON_ONCE(true); #endif and in both call stacks I found the following: blkdev_issue_discard(). I will take a closer look. Bart.