Received: by 2002:a05:6a10:1d13:0:0:0:0 with SMTP id pp19csp2395245pxb; Mon, 23 Aug 2021 20:43:55 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxTTvlhEAyRtXL4gqu4oVLyd0P6FDbWbQETOo/oZ+0NMHVDMSfGTtX76x2m636zoFZlWe4m X-Received: by 2002:aa7:de85:: with SMTP id j5mr39986119edv.147.1629776635551; Mon, 23 Aug 2021 20:43:55 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1629776635; cv=none; d=google.com; s=arc-20160816; b=CBpmAorzKK41S6e5z3ArHX1FZEyyhFoF31u4IYMvGc/gsxWXqRODtS+T4iDGWkgBnI YjTjo3DfLAV8ngFiYq7+k9fG0r8PKeESxXXb1XJZjovCuPyGnSlPAcO3fkiwwX4IuNqA RUCNzaFW/tjPCOs71mCTvO6P7p1tCjwyarFF25kaHjyTHzV72Sm8zdbWl2bdaCWYNTfF gkE7hPN6WfYovm2YDuLbZl6ozGT1ek2IUG7eSOlnhZ96HgBI31jQ8+mbKtMDFoY8zOPK MnQrndEIpPGfXS0sPFtne6DDi1BlrswZ8RPLycbGGs1BX+jBlTn+Ac858Q0ECEGIfjTT tCJQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:from:references :cc:to:subject; bh=1IJpqO4B3Z7N5/PXofpZnmMF7pO3llTR5i+tE5urGjs=; b=pU3F9QUwJ6+Br6nqYFy1qzWpnqjZTPB0aUVznGg+oU9gLcJTNeE8ngyeDdrhxUWSxg SRSUuET7+BBJCnXl6Sllxw6UGIQgzgT5Ep/ET4edJkoSi1RDxPnZKyaTDlmJwOnx5UTF gnhtRyFTJvuRafcuLQe8uVUt2V8tPMxOs/TZMiixo/PKzVOsxhhMczWtzdbMyaOe/msv 1x31wnBhQpa9HayepCWAz6xMqR/pStrfYHbVGK3n/Kf4x2ub2MY8oEbM8uZDgfUT1+H5 1d0nio7X7lq56O2A+XCQ+S8fMvxCn/rQzfjIEFaA7h5OrnOPjUIy2e+yo3IXBwqxZ+v2 Wn+Q== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id go42si3659941ejc.294.2021.08.23.20.43.32; Mon, 23 Aug 2021 20:43:55 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234107AbhHXDl4 (ORCPT + 99 others); Mon, 23 Aug 2021 23:41:56 -0400 Received: from mail-pl1-f178.google.com ([209.85.214.178]:39861 "EHLO mail-pl1-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232605AbhHXDly (ORCPT ); Mon, 23 Aug 2021 23:41:54 -0400 Received: by mail-pl1-f178.google.com with SMTP id m17so4365184plc.6; Mon, 23 Aug 2021 20:41:11 -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=1IJpqO4B3Z7N5/PXofpZnmMF7pO3llTR5i+tE5urGjs=; b=JxYBKsYHUUpwSEiUWHeZE8sHZC1fawckWA8P007Ib6ZEzUZ7l6l4rS7Ct4hSQnDCKx D3lfjMAWUyXT69h2eyz2xu6+uZjfcWd554YjmZlx8pshbgMrcOxk0zNzxl7a7/0yLk+i htfDaiLkgtzma0bEMG+GbqgawaSGqW1Vg9Z7eSE2vkykgWSJUdVBcfLhWydCGrMVbYNq x1Hz/MsnpgPcHDIA+dZN+aB5riRhK0XES4DUAG7ElQu+ogvNCykIQsDHSDhHEdOpZCtH UcFMnxquVB3+YXtBfFYYYTEdrj1ot042/irl1fS52ePW3RcLVT/QfU/u6WzNfRnPCJQW IPqA== X-Gm-Message-State: AOAM530huPzEYKmjylnkTZcYCEyWP4on9g929jG03cvbJx6qePGJ+rPF 2bn8zo+Yz3M4tpiPbjb7LPs= X-Received: by 2002:a17:90a:4417:: with SMTP id s23mr1982741pjg.23.1629776470945; Mon, 23 Aug 2021 20:41:10 -0700 (PDT) Received: from ?IPv6:2601:647:4000:d7:68:8a8:39ff:312? ([2601:647:4000:d7:68:8a8:39ff:312]) by smtp.gmail.com with ESMTPSA id a20sm637453pjh.46.2021.08.23.20.41.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Aug 2021 20:41:10 -0700 (PDT) Subject: Re: [PATCH v3] scsi: core: Fix hang of freezing queue between blocking and running device To: Li Jinlin , jejb@linux.ibm.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: john.garry@huawei.com, qiulaibin@huawei.com, linfeilong@huawei.com, wubo40@huawei.com References: <20210824025921.3277629-1-lijinlin3@huawei.com> From: Bart Van Assche Message-ID: Date: Mon, 23 Aug 2021 20:41:08 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <20210824025921.3277629-1-lijinlin3@huawei.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 8/23/21 7:59 PM, Li Jinlin wrote: > We found a hang issue, the test steps are as follows: > 1. blocking device via scsi_device_set_state() > 2. dd if=/dev/sda of=/mnt/t.log bs=1M count=10 > 3. echo none > /sys/block/sda/queue/scheduler > 4. echo "running" >/sys/block/sda/device/state Reviewed-by: Bart Van Assche