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=-3.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 7C10CC00A89 for ; Mon, 2 Nov 2020 15:19:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 371FF22245 for ; Mon, 2 Nov 2020 15:19:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="XJ9CstI7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726376AbgKBPTI (ORCPT ); Mon, 2 Nov 2020 10:19:08 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:36714 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726348AbgKBPTG (ORCPT ); Mon, 2 Nov 2020 10:19:06 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1604330344; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BvbrY2I55xkY2YSa9P0xoipZGviKjz7sESXGUBs+2p8=; b=XJ9CstI75BfV9NpOwxC8iOhG/cVy2jgUmZ95ie4jilFzLLbKfB8ZWGd30/2enlS7paSbB6 2ZJi989KWtfumPXuDsTb6qnWHP4F3kQoZijHnkuA805k+2tdvdW+EwVyfrKe/XFy07FE7j nbNC5FQy2wxFaNQ1pFV+pSWy/mncQIk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-191-t3mUCsi4Pvy3oaSaZG1aqg-1; Mon, 02 Nov 2020 10:18:59 -0500 X-MC-Unique: t3mUCsi4Pvy3oaSaZG1aqg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B9B0E59; Mon, 2 Nov 2020 15:18:56 +0000 (UTC) Received: from ovpn-112-12.rdu2.redhat.com (ovpn-112-12.rdu2.redhat.com [10.10.112.12]) by smtp.corp.redhat.com (Postfix) with ESMTP id B4D495D98A; Mon, 2 Nov 2020 15:18:53 +0000 (UTC) Message-ID: <193a0440eed447209c48bda042f0e4db102355e7.camel@redhat.com> Subject: Re: [PATCH v8 17/18] scsi: megaraid_sas: Added support for shared host tagset for cpuhotplug From: Qian Cai To: John Garry , axboe@kernel.dk, jejb@linux.ibm.com, martin.petersen@oracle.com, don.brace@microsemi.com, kashyap.desai@broadcom.com, ming.lei@redhat.com, bvanassche@acm.org, dgilbert@interlog.com, paolo.valente@linaro.org, hare@suse.de, hch@lst.de Cc: sumit.saxena@broadcom.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, esc.storagedev@microsemi.com, megaraidlinux.pdl@broadcom.com, chenxiang66@hisilicon.com, luojiaxing@huawei.com, Hannes Reinecke Date: Mon, 02 Nov 2020 10:18:51 -0500 In-Reply-To: <385d5408-6ba2-6bb6-52d3-b59c9aa9c5e5@huawei.com> References: <1597850436-116171-1-git-send-email-john.garry@huawei.com> <1597850436-116171-18-git-send-email-john.garry@huawei.com> <385d5408-6ba2-6bb6-52d3-b59c9aa9c5e5@huawei.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Mon, 2020-11-02 at 14:51 +0000, John Garry wrote: > On 02/11/2020 14:17, Qian Cai wrote: > > [ 251.961152][ T330] INFO: task systemd-udevd:567 blocked for more than > > 122 seconds. > > [ 251.968876][ T330] Not tainted 5.10.0-rc1-next-20201102 #1 > > [ 251.975003][ T330] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" > > disables this message. > > [ 251.983546][ T330] task:systemd-udevd state:D stack:27224 pid: 567 > > ppid: 506 flags:0x00004324 > > [ 251.992620][ T330] Call Trace: > > [ 251.995784][ T330] __schedule+0x71d/0x1b60 > > [ 252.000067][ T330] ? __sched_text_start+0x8/0x8 > > [ 252.004798][ T330] schedule+0xbf/0x270 > > [ 252.008735][ T330] schedule_timeout+0x3fc/0x590 > > [ 252.013464][ T330] ? usleep_range+0x120/0x120 > > [ 252.018008][ T330] ? wait_for_completion+0x156/0x250 > > [ 252.023176][ T330] ? lock_downgrade+0x700/0x700 > > [ 252.027886][ T330] ? rcu_read_unlock+0x40/0x40 > > [ 252.032530][ T330] ? do_raw_spin_lock+0x121/0x290 > > [ 252.037412][ T330] ? lockdep_hardirqs_on_prepare+0x27c/0x3d0 > > [ 252.043268][ T330] ? _raw_spin_unlock_irq+0x1f/0x30 > > [ 252.048331][ T330] wait_for_completion+0x15e/0x250 > > [ 252.053323][ T330] ? wait_for_completion_interruptible+0x320/0x320 > > [ 252.059687][ T330] ? lockdep_hardirqs_on_prepare+0x27c/0x3d0 > > [ 252.065543][ T330] ? _raw_spin_unlock_irq+0x1f/0x30 > > [ 252.070606][ T330] __flush_work+0x42a/0x900 > > [ 252.074989][ T330] ? queue_delayed_work_on+0x90/0x90 > > [ 252.080139][ T330] ? __queue_work+0x463/0xf40 > > [ 252.084700][ T330] ? init_pwq+0x320/0x320 > > [ 252.088891][ T330] ? queue_work_on+0x5e/0x80 > > [ 252.093364][ T330] ? trace_hardirqs_on+0x1c/0x150 > > [ 252.098255][ T330] work_on_cpu+0xe7/0x130 > > [ 252.102461][ T330] ? flush_delayed_work+0xc0/0xc0 > > [ 252.107342][ T330] ? __mutex_unlock_slowpath+0xd4/0x670 > > [ 252.112764][ T330] ? work_debug_hint+0x30/0x30 > > [ 252.117391][ T330] ? pci_device_shutdown+0x80/0x80 > > [ 252.122378][ T330] ? cpumask_next_and+0x57/0x80 > > [ 252.127094][ T330] pci_device_probe+0x500/0x5c0 > > [ 252.131824][ T330] ? pci_device_remove+0x1f0/0x1f0 > > Is CONFIG_DEBUG_TEST_DRIVER_REMOVE enabled? I figure it is, with this call. > > Or please share the .config No. https://cailca.coding.net/public/linux/mm/git/files/master/x86.config > > Cheers, > John > > > [ 252.136805][ T330] really_probe+0x207/0xad0 > > [ 252.141191][ T330] ? device_driver_attach+0x120/0x120 > > [ 252.146428][ T330] driver_probe_device+0x1f1/0x370 > > [ 252.151424][ T330] device_driver_attach+0xe5/0x120 > > [ 252.156399][ T330] __driver_attach+0xf0/0x260 > > [ 252.160953][ T330] bus_for_each_dev+0x117/0x1a0 > > [ 252.165669][ T330] ? subsys_dev_iter_exit+0x10/0x10 > > [ 252.170731][ T330] bus_add_driver+0x399/0x560 > > [ 252.175289][ T330] driver_register+0x189/0x310 > > [ 252.179919][ T330] ? 0xffffffffc05c1000 > > [ 252.183960][ T330] megasas_init+0x117/0x1000 [megaraid_sas] > > [ 252.189713][ T330] do_one_initcall+0xf6/0x510 > > [ 252.194267][ T330] ? perf_trace_initcall_level+0x490/0x490 > > [ 252.199940][ T330] ? kasan_unpoison_shadow+0x30/0x40 > > [ 252.205104][ T330] ? __kasan_kmalloc.constprop.11+0xc1/0xd0 > > [ 252.210859][ T330] ? do_init_module+0x49/0x6c0 > > [ 252.215500][ T330] ? kmem_cache_alloc_trace+0x11f/0x1e0 > > [ 252.220925][ T330] ? kasan_unpoison_shadow+0x30/0x40 > > [ 252.226068][ T330] do_init_module+0x1ed/0x6c0 > > [ 252.230608][ T330] load_module+0x4a59/0x5d20 > > [ 252.235081][ T330] ? layout_and_allocate+0x2770/0x2770 > > [ 252.240404][ T330] ? __vmalloc_node+0x8d/0x100 > > [ 252.245046][ T330] ? kernel_read_file+0x485/0x5a0 > > [ 252.249934][ T330] ? kernel_read_file+0x305/0x5a0 > > [ 252.254839][ T330] ? __x64_sys_fsconfig+0x970/0x970 > > [ 252.259903][ T330] ? __do_sys_finit_module+0xff/0x180 > > [ 252.265153][ T330] __do_sys_finit_module+0xff/0x180 > > [ 252.270216][ T330] ? __do_sys_init_module+0x1d0/0x1d0 > > [ 252.275465][ T330] ? __fget_files+0x1c3/0x2e0 > > [ 252.280010][ T330] do_syscall_64+0x33/0x40 > > [ 252.284304][ T330] entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > [ 252.290054][ T330] RIP: 0033:0x7fbb3e2fa78d > > [ 252.294348][ T330] Code: Unable to access opcode bytes at RIP > > 0x7fbb3e2fa763. > > [ 252.301584][ T330] RSP: 002b:00007ffe572e8d18 EFLAGS: 00000246 ORIG_RAX: > > 0000000000000139 > > [ 252.309855][ T330] RAX: ffffffffffffffda RBX: 000055c7795d90f0 RCX: > > 00007fbb3e2fa78d > > [ 252.317703][ T330] RDX: 0000000000000000 RSI: 00007fbb3ee6c82d RDI: > > 0000000000000006 > > [ 252.325553][ T330] RBP: 00007fbb3ee6c82d R08: 0000000000000000 R09: > > 00007ffe572e8e40 > > [ 252.333402][ T330] R10: 0000000000000006 R11: 0000000000000246 R12: > > 0000000000000000 > > [ 252.341257][ T330] R13: 000055c7795930e0 R14: 0000000000020000 R15: > > 0000000000000000 > > [ 252.349117][ T330]