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 36EE1C4361B for ; Tue, 8 Dec 2020 21:15:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EBE2B23B03 for ; Tue, 8 Dec 2020 21:15:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729373AbgLHVP3 (ORCPT ); Tue, 8 Dec 2020 16:15:29 -0500 Received: from frasgout.his.huawei.com ([185.176.79.56]:2227 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727660AbgLHVP3 (ORCPT ); Tue, 8 Dec 2020 16:15:29 -0500 Received: from fraeml711-chm.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4CrCXd65Qtz67FSB; Wed, 9 Dec 2020 05:11:29 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml711-chm.china.huawei.com (10.206.15.60) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Tue, 8 Dec 2020 22:14:47 +0100 Received: from [10.210.169.98] (10.210.169.98) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Tue, 8 Dec 2020 21:14:46 +0000 Subject: Re: problem booting 5.10 To: Linus Torvalds , "Martin K. Petersen" CC: Julia Lawall , "James E.J. Bottomley" , Linux Kernel Mailing List , , linux-scsi , Kashyap Desai , Ming Lei References: From: John Garry Message-ID: <9106e994-bb4b-4148-1280-f08f71427420@huawei.com> Date: Tue, 8 Dec 2020 21:14:10 +0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.1.2 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.210.169.98] X-ClientProxiedBy: lhreml719-chm.china.huawei.com (10.201.108.70) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/12/2020 19:19, Linus Torvalds wrote: > On Tue, Dec 8, 2020 at 10:59 AM Martin K. Petersen > wrote: >> >>> So I'm adding SCSI people to the cc, just in case they go "Hmm..". >> >> Only change in this department was: >> >> 831e3405c2a3 scsi: core: Don't start concurrent async scan on same host > > Yeah, I found that one too, and dismissed it for the same reason you > did - it wasn't in rc1. Plus it looked very simple. > > That said, maybe Julia might have misspoken, and rc1 was ok, so I > guess it's possible. The scan_mutex does show up in that "locks held" > list, although I can't see why it would matter. But it does > potentially change timing (so it could expose some existing race), if > nothing else. > > But let's make sure Jens is aware of this too, in case it's some ATA > issue. Not that any of those handful of 5.10 changes look remotely > likely _either_. > > Jens, see > > https://lore.kernel.org/lkml/alpine.DEB.2.22.394.2012081813310.2680@hadrien/ > > if you don't already have the lkml thread locally.. There's not enough > of the dmesg to even really guess what Julia's actual hardware is, > apart from it being a Seagate SATA disk. Julia? What controllers and > disks do you have show up when things work? > > Linus > . > JFYI, About "scsi: megaraid_sas: Added support for shared host tagset for cpuhotplug", we did have an issue reported here already from Qian about a boot hang: https://lore.kernel.org/linux-scsi/fe3dff7dae4494e5a88caffbb4d877bbf472dceb.camel@redhat.com/ And the solution to that specific problem is in: https://lore.kernel.org/linux-block/20201203012638.543321-1-ming.lei@redhat.com/ This issue may be related, so you could test by reverting that megaraid sas commit or setting the driver module param "host_tagset_enable=0" just to see. Thanks, John