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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F34B2C433EF for ; Sat, 14 May 2022 09:49:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231571AbiENJtq (ORCPT ); Sat, 14 May 2022 05:49:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49218 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231552AbiENJtp (ORCPT ); Sat, 14 May 2022 05:49:45 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98D074F441; Sat, 14 May 2022 02:49:23 -0700 (PDT) Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4L0gZx14z1z67Xmk; Sat, 14 May 2022 17:44:25 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml714-chm.china.huawei.com (10.206.15.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Sat, 14 May 2022 11:49:20 +0200 Received: from [10.47.26.143] (10.47.26.143) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2375.24; Sat, 14 May 2022 10:49:19 +0100 Message-ID: <0f274df2-e7e2-bfca-14b5-631fe78fc6da@huawei.com> Date: Sat, 14 May 2022 10:49:18 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.6.1 Subject: Re: [bug report] IOMMU reports data translation fault for fio testing To: Bart Van Assche , , CC: "chenxiang66@hisilicon.com >> Xiang Chen" , "liyihang (E)" References: <2b7d091b-4caf-948f-b41a-29a7fcb9fc2a@huawei.com> From: John Garry In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.47.26.143] X-ClientProxiedBy: lhreml704-chm.china.huawei.com (10.201.108.53) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 14/05/2022 03:28, Bart Van Assche wrote: > On 5/13/22 05:01, John Garry wrote: >> It could be an issue with the SCSI hba driver. > > That seems likely to me. Sure, that would be common wisdom. However the commit before anything related to driver was added for 5.18 is also bad. It could be pre-existing, but that starts to seem unlikely. Or it could still be an IOMMU issue - we already have a performance issue there. This issue can take more than 15 minutes to occur, so is pretty painful to bisect... Thanks, John