From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751429AbdKUNb1 (ORCPT ); Tue, 21 Nov 2017 08:31:27 -0500 Received: from mga03.intel.com ([134.134.136.65]:56964 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751115AbdKUNbY (ORCPT ); Tue, 21 Nov 2017 08:31:24 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,432,1505804400"; d="scan'208";a="4261221" Date: Tue, 21 Nov 2017 21:31:20 +0800 From: Fengguang Wu To: linux-serial@vger.kernel.org Cc: Greg Kroah-Hartman , Jiri Slaby , Linus Torvalds , Andy Shevchenko , Sean Young , Matthias Brugger , linux-kernel@vger.kernel.org, lkp@01.org Subject: Re: [serial8250_interrupt] RIP: 0010:arch_local_irq_restore+0x2/0x8 Message-ID: <20171121133120.43fe5ak2gct56nmp@wfg-t540p.sh.intel.com> References: <20171121090529.p3bcdz5y5bs5mqk2@wfg-t540p.sh.intel.com> <20171121123357.bw5raz3vqkob2vgz@wfg-t540p.sh.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20171121123357.bw5raz3vqkob2vgz@wfg-t540p.sh.intel.com> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 21, 2017 at 08:33:57PM +0800, Fengguang Wu wrote: >Hello, > >FYI this happens in mainline kernel 4.14.0-02748-gabc36be. >It shows up since v4.13 . Sorry it actually also shows up in 4.10: /pkg/linux/x86_64-rhel-7.2+CONFIG_DEBUG_INFO_REDUCED/gcc-6/c470abd4fde40ea6a0846a2beab642a578c0b8cd/dmesg-vm-lkp-hsw01-4G-1:20171110043200:x86_64-rhel-7.2+CONFIG_DEBUG_INFO_REDUCED:4.10.0:1 [ 19.902933] [ 19.904514] [ 19.904515] [ 21.020567] irq 3: nobody cared (try booting with the "irqpoll" option) [ 21.021466] CPU: 0 PID: 4094 Comm: dmesg Not tainted 4.10.0 #1 [ 21.022276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 21.023584] Call Trace: [ 21.024126] [ 21.025622] dump_stack+0x63/0x8a [ 21.026238] __report_bad_irq+0x35/0xc0 [ 21.026890] note_interrupt+0x234/0x270 [ 21.027548] handle_irq_event_percpu+0x45/0x60 [ 21.028249] handle_irq_event+0x42/0x70 [ 21.028901] handle_edge_irq+0x74/0x140 [ 21.029560] handle_irq+0x73/0x120 [ 21.030177] ? irq_exit+0x6a/0xf0 [ 21.030794] do_IRQ+0x46/0xd0 [ 21.031380] common_interrupt+0x8e/0x8e [ 21.032042] RIP: 0010:_raw_spin_unlock_irqrestore+0x15/0x30 [ 21.032831] RSP: 0018:ffffc90002d9fd28 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffcc [ 21.034081] RAX: 0000000000000001 RBX: ffffffff82362ee8 RCX: 0000000000000000 [ 21.034999] RDX: 00000000000002f9 RSI: 0000000000000286 RDI: 0000000000000286 [ 21.035914] RBP: ffffc90002d9fd28 R08: 0000000000000004 R09: ffff88012e6dfc38 [ 21.036826] R10: 00007ffc8f5bb708 R11: ffff88007f542580 R12: ffff88007fd51c00 [ 21.037742] R13: 0000000000000286 R14: ffffc900031672a0 R15: 0000000000000001 [ 21.038654] [ 21.039171] uart_start+0x73/0xe0 [ 21.039783] uart_flush_chars+0xe/0x10 [ 21.040430] n_tty_write+0x231/0x450 [ 21.041068] ? __wake_up_sync+0x20/0x20 [ 21.041721] tty_write+0x1ab/0x330 [ 21.042346] ? n_tty_open+0xd0/0xd0 [ 21.042972] __vfs_write+0x28/0x140 [ 21.043602] ? security_file_permission+0x3b/0xc0 [ 21.044326] ? rw_verify_area+0x4e/0xb0 [ 21.044977] vfs_write+0xc8/0x1e0 [ 21.045596] SyS_write+0x46/0xa0 [ 21.046207] entry_SYSCALL_64_fastpath+0x1a/0xa9 [ 21.046926] RIP: 0033:0x7f7a0064a720 [ 21.047560] RSP: 002b:00007ffc8f5bb688 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 21.048811] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f7a0064a720 [ 21.049723] RDX: 0000000000000001 RSI: 000000000060c400 RDI: 0000000000000001 [ 21.050636] RBP: 00007f7a00907683 R08: 00007f7a00908760 R09: 00007f7a00907600 [ 21.051554] R10: 00007ffc8f5bb708 R11: 0000000000000246 R12: 0000000000000001 [ 21.052471] R13: 0000000000000001 R14: 00007f7a00907600 R15: 0000000000000001 [ 21.053383] handlers: [ 21.053913] [] serial8250_interrupt [ 21.054662] Disabling IRQ #3 Fengguang