Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933263Ab2JaUKg (ORCPT ); Wed, 31 Oct 2012 16:10:36 -0400 Received: from mail-qc0-f174.google.com ([209.85.216.174]:40527 "EHLO mail-qc0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760350Ab2JaUKc (ORCPT ); Wed, 31 Oct 2012 16:10:32 -0400 Message-ID: <509185A3.1020105@gmail.com> Date: Wed, 31 Oct 2012 16:10:11 -0400 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121024 Thunderbird/16.0.1 MIME-Version: 1.0 To: Jiri Slaby CC: Jiri Slaby , gregkh@linuxfoundation.org, alan@linux.intel.com, linux-kernel@vger.kernel.org, Dave Jones Subject: Re: [PATCH 21/21] TTY: move tty buffers to tty_port References: <1350592007-9216-1-git-send-email-jslaby@suse.cz> <1350592007-9216-22-git-send-email-jslaby@suse.cz> <50897E98.5080502@gmail.com> <50911F67.3040303@suse.cz> <5091448D.3@suse.cz> In-Reply-To: <5091448D.3@suse.cz> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2888 Lines: 53 On 10/31/2012 11:32 AM, Jiri Slaby wrote: > On 10/31/2012 04:30 PM, Sasha Levin wrote: >> On Wed, Oct 31, 2012 at 8:53 AM, Jiri Slaby wrote: >>> On 10/25/2012 08:02 PM, Sasha Levin wrote: >>>> Fuzzing with trinity inside a KVM tools (lkvm) guest with -next kernel >>>> uncovered the following warning: >>> >>> I cannot reproduce that :(. Do you still see it? >> >> Yes, it reproduces pretty easily while fuzzing. > > What is your exact setup? I tried trinity with 100 000 syscalls inside > KVM with an LDEP-enabled kernel. How many serial ports do you have in > the guest? Any USB serials in there? btw, I'm also seeing the following lockups, don't know if it's related: [ 2283.070569] INFO: task trinity-child20:9161 blocked for more than 120 seconds. [ 2283.071775] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2283.074673] trinity-child20 D ffff8800276cb000 5424 9161 6364 0x00000000 [ 2283.076018] ffff880059d9da58 0000000000000002 0000000000000002 0000000000000000 [ 2283.077393] ffff880059d7b000 ffff880059d9dfd8 ffff880059d9dfd8 ffff880059d9dfd8 [ 2283.078763] ffff8800276cb000 ffff880059d7b000 ffff880059d9da78 ffff88001a095180 [ 2283.084144] Call Trace: [ 2283.085039] [] schedule+0x55/0x60 [ 2283.086748] [] schedule_preempt_disabled+0x13/0x20 [ 2283.089000] [] __mutex_lock_common+0x36d/0x5a0 [ 2283.090658] [] ? tty_lock_nested+0x73/0x80 [ 2283.091691] [] ? tty_lock_nested+0x73/0x80 [ 2283.092779] [] mutex_lock_nested+0x3f/0x50 [ 2283.093875] [] tty_lock_nested+0x73/0x80 [ 2283.094872] [] tty_lock+0xb/0x10 [ 2283.095443] [] tty_open+0x270/0x5f0 [ 2283.096181] [] chrdev_open+0xf8/0x1d0 [ 2283.097054] [] do_dentry_open+0x1fc/0x310 [ 2283.098015] [] ? cdev_put+0x20/0x20 [ 2283.098943] [] finish_open+0x4a/0x60 [ 2283.099935] [] do_last+0xb87/0xe70 [ 2283.100910] [] ? link_path_walk+0x70/0x900 [ 2283.101553] [] path_openat+0xc2/0x500 [ 2283.102282] [] ? _raw_spin_unlock_irqrestore+0x84/0xb0 [ 2283.103506] [] do_filp_open+0x3c/0xa0 [ 2283.104282] [] ? __alloc_fd+0x1e1/0x200 [ 2283.105278] [] do_sys_open+0x11c/0x1c0 [ 2283.106519] [] sys_open+0x1c/0x20 [ 2283.107241] [] sys_creat+0x11/0x20 [ 2283.107975] [] tracesys+0xe1/0xe6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/