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=-2.2 required=3.0 tests=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 B81ADC433DF for ; Thu, 9 Jul 2020 11:49:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9DE1A206DF for ; Thu, 9 Jul 2020 11:49:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727780AbgGILtm (ORCPT ); Thu, 9 Jul 2020 07:49:42 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:38260 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726387AbgGILtm (ORCPT ); Thu, 9 Jul 2020 07:49:42 -0400 Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 5895B6936C31BE6C6F6A; Thu, 9 Jul 2020 19:49:40 +0800 (CST) Received: from [10.174.185.226] (10.174.185.226) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.487.0; Thu, 9 Jul 2020 19:49:33 +0800 Subject: Re: [REPORT] possible circular locking dependency when booting a VM on arm64 host To: Salil Mehta CC: Marc Zyngier , Thomas Gleixner , "Linux Kernel Mailing List" , "linux-arm-kernel@lists.infradead.org" , "Zhuangyuzeng (Yisen)" , "Wanghaibin (D)" References: <7225eba7-6e5e-ec7e-953b-d1fef0b1775b@huawei.com> <134ee452eda74f0cbdc10354fe66c48e@huawei.com> From: Zenghui Yu Message-ID: <7c1bb3c1-3f64-8c24-ed59-eb3da7bf6643@huawei.com> Date: Thu, 9 Jul 2020 19:49:33 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <134ee452eda74f0cbdc10354fe66c48e@huawei.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.174.185.226] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020/7/9 18:54, Salil Mehta wrote: > Hi Yuzenghui, > I will try to reproduce it today at our platform. Just one question is it easily > reproducible or is a rare occurrence? Salil, it's 100% reproducible once you start a guest. You don't even need to assign hostdev to the VM. Thanks, Zenghui