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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 6D5F0C43441 for ; Tue, 27 Nov 2018 13:08:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3C3C420989 for ; Tue, 27 Nov 2018 13:08:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3C3C420989 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-block-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726410AbeK1AGY (ORCPT ); Tue, 27 Nov 2018 19:06:24 -0500 Received: from mx1.redhat.com ([209.132.183.28]:52760 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726345AbeK1AGY (ORCPT ); Tue, 27 Nov 2018 19:06:24 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3F8B2307EAA6; Tue, 27 Nov 2018 13:08:32 +0000 (UTC) Received: from ming.t460p (ovpn-8-25.pek2.redhat.com [10.72.8.25]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B791560C4C; Tue, 27 Nov 2018 13:08:24 +0000 (UTC) Date: Tue, 27 Nov 2018 21:08:19 +0800 From: Ming Lei To: "chenxiang (M)" Cc: "James E.J. Bottomley" , "Martin K. Petersen" , "linux-scsi@vger.kernel.org" , "linux-block@vger.kernel.org" , John Garry , Linuxarm Subject: Re: DIF/DIX issue related to config CONFIG_SCSI_MQ_DEFAULT Message-ID: <20181127130811.GA2780@ming.t460p> References: <5d9bf51d-1ef9-b948-2168-9e7526d77225@hisilicon.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5d9bf51d-1ef9-b948-2168-9e7526d77225@hisilicon.com> User-Agent: Mutt/1.9.1 (2017-09-22) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Tue, 27 Nov 2018 13:08:32 +0000 (UTC) Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Tue, Nov 27, 2018 at 05:55:45PM +0800, chenxiang (M) wrote: > Hi all, > > There is a issue which may be related to CONFIG_SCSI_MQ_DEFAULT: before we > developed DIF/DIX feature on kernel 4.18 (disable CONFIG_SCSI_MQ_DEFAULT > default), and > it works well. I guess you are testing hisi_sas_v3_hw, does 4.18 work with 'scsi_mod.use_blk_mq=Y'? If yes, you may run 'git bisect' to figure out which commit is the 1st bad one. > But when we switch to kernel 4.19-rc1 and 4.20-rc1, Call > trace as follow occurs when running fio and if disable config > CONFIG_SCSI_MQ_DEFAULT, > then it works well. Also if switch ioengine=libaio to ioengine=psync, it > seems also work well. Do you have any idea or encounter similar issue? I tested scsi-debug via 'dix=1 dif=1', looks everything is fine, are you using direct io or not? > > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > job1: (g=0): rw=rw, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=128 > fio 2.0.5 > Starting 12 processes > [ 629.210506] Unable to handle kernel paging request at virtual address > 0000ffff8027e048 > [ 629.210506] Unable to handle kernel paging request at virtual address > 0000ffff8027e048 > [ 629.226373] Mem abort info: > [ 629.226373] Mem abort info: > [ 629.231952] ESR = 0x96000006 > [ 629.231952] ESR = 0x96000006 > [ 629.238052] Exception class = DABT (current EL), IL = 32 bits > [ 629.238052] Exception class = DABT (current EL), IL = 32 bits > [ 629.249898] SET = 0, FnV = 0 > [ 629.249898] SET = 0, FnV = 0 > [ 629.255998] EA = 0, S1PTW = 0 > [ 629.255998] EA = 0, S1PTW = 0 > [ 629.262272] Data abort info: > [ 629.262272] Data abort info: > [ 629.268023] ISV = 0, ISS = 0x00000006 > [ 629.268023] ISV = 0, ISS = 0x00000006 > [ 629.275690] CM = 0, WnR = 0 > [ 629.275690] CM = 0, WnR = 0 > [ 629.281617] user pgtable: 4k pages, 48-bit VAs, pgdp = 0000000085c91728 > [ 629.281617] user pgtable: 4k pages, 48-bit VAs, pgdp = 0000000085c91728 > [ 629.294857] [0000ffff8027e048] pgd=00000027a8644003, > pud=00000027a85ea003, pmd=0000000000000000 > [ 629.294857] [0000ffff8027e048] pgd=00000027a8644003, > pud=00000027a85ea003, pmd=0000000000000000 > [ 629.312278] Internal error: Oops: 96000006 [#1] PREEMPT SMP > [ 629.312278] Internal error: Oops: 96000006 [#1] PREEMPT SMP > [ 629.323427] Modules linked in: hisi_sas_v3_hw [last unloaded: > hisi_sas_v3_hw] > [ 629.323427] Modules linked in: hisi_sas_v3_hw [last unloaded: > hisi_sas_v3_hw] > [ 629.337713] CPU: 13 PID: 4465 Comm: fio Not tainted > 4.20.0-rc1-15093-ge876dec #1067 > [ 629.337713] CPU: 13 PID: 4465 Comm: fio Not tainted > 4.20.0-rc1-15093-ge876dec #1067 > [ 629.353040] Hardware name: Huawei D06/D06, BIOS Hisilicon D06 UEFI RC0 - > B601 (V6.01) 11/08/2018 > [ 629.353040] Hardware name: Huawei D06/D06, BIOS Hisilicon D06 UEFI RC0 - > B601 (V6.01) 11/08/2018 > [ 629.370633] pstate: 80400009 (Nzcv daif +PAN -UAO) > [ 629.370633] pstate: 80400009 (Nzcv daif +PAN -UAO) > [ 629.380218] pc : deadline_remove_request+0x2c/0xd0 > [ 629.380218] pc : deadline_remove_request+0x2c/0xd0 Could you use gdb to find where 'deadline_remove_request+0x2c' points to? Thanks, Ming