Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755366Ab0KFOFI (ORCPT ); Sat, 6 Nov 2010 10:05:08 -0400 Received: from pindarots.xs4all.nl ([80.101.128.228]:53596 "EHLO pindarots.xs4all.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754758Ab0KFOFG (ORCPT ); Sat, 6 Nov 2010 10:05:06 -0400 Message-ID: <4CD56087.9000009@xs4all.nl> Date: Sat, 06 Nov 2010 15:04:55 +0100 From: Udo van den Heuvel User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.12) Gecko/20101027 Fedora/3.1.6-1.fc13 Lightning/1.0b3pre Thunderbird/3.1.6 MIME-Version: 1.0 To: Arnd Bergmann CC: Karsten Keil , Greg KH , linux-kernel@vger.kernel.org Subject: Re: known vboxgetty/isdn issue in 2.6.35.3? References: <4C864143.5090803@xs4all.nl> <201009072145.10946.arnd@arndb.de> In-Reply-To: <201009072145.10946.arnd@arndb.de> X-Enigmail-Version: 1.1.2 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: 22535 Lines: 789 On 2010-09-07 21:45, Arnd Bergmann wrote: > Can you send the output of "head -n 20 /proc/*/stack"? If > CONFIG_LOCKDEP gives you more data, that would be even better. My most recent post about this issue, occurring on 2.6.35.7, had a kernel with this: # gzip -dc /proc/config.gz |grep LOCKDEP CONFIG_LOCKDEP_SUPPORT=y CONFIG_LOCKDEP=y # CONFIG_DEBUG_LOCKDEP is not set Stacks below, after occurring on 2.6.35.7: # head -n 20 /proc/*/stack ==> /proc/1077/stack <== [] kjournald+0x171/0x1e2 [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/113/stack <== [] bdi_sync_supers+0x20/0x33 [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/11418/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/115/stack <== [] bdi_forker_task+0x155/0x25f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1179/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_poll+0x3f/0x88 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/117/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/118/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/119/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/11/stack <== [] async_manager_thread+0x92/0xb2 [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/120/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1386/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1451/stack <== [] bdi_writeback_task+0x77/0xd9 [] bdi_start_fn+0x57/0xad [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1485/stack <== [] kjournald+0x171/0x1e2 [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1486/stack <== [] kjournald+0x171/0x1e2 [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1487/stack <== [] kjournald+0x171/0x1e2 [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1488/stack <== [] kjournald+0x171/0x1e2 [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1489/stack <== [] kjournald2+0x15b/0x1cf [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1490/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1491/stack <== [] kjournald2+0x15b/0x1cf [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1492/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1493/stack <== [] kjournald2+0x15b/0x1cf [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1494/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1495/stack <== [] kjournald2+0x15b/0x1cf [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1496/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1497/stack <== [] kjournald2+0x15b/0x1cf [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1498/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1508/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_ppoll+0x87/0xf6 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/1509/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_ppoll+0x87/0xf6 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/1510/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1516/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/1517/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/16758/stack <== [] tty_unthrottle+0x13/0x3a [] reset_buffer_flags+0xd4/0xd9 [] n_tty_flush_buffer+0xd/0x63 [] tty_ldisc_flush+0x1f/0x34 [] isdn_tty_modem_result+0x342/0x37c [] isdn_tty_modem_hup+0x76/0x176 [] isdn_tty_change_speed+0xa2/0xd4 [] isdn_tty_set_termios+0x3d/0x5a [] set_termios+0x318/0x397 [] tty_mode_ioctl+0x178/0x2db [] n_tty_ioctl_helper+0x144/0x154 [] n_tty_ioctl+0x97/0xa0 [] tty_ioctl+0x699/0x6d3 [] vfs_ioctl+0x27/0x91 [] do_vfs_ioctl+0x44b/0x47f [] sys_ioctl+0x41/0x61 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/1692/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/19110/stack <== [] sys_semtimedop+0x6ee/0x828 [] sys_ipc+0x49/0x130 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/19748/stack <== [] sys_epoll_wait+0x145/0x1e3 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/19773/stack <== [] hrtimer_nanosleep+0x82/0xda [] sys_nanosleep+0x44/0x51 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/1/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2002/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2005/stack <== [] do_syslog+0xd3/0x340 [] kmsg_read+0x3b/0x44 [] proc_reg_read+0x6a/0x84 [] vfs_read+0x88/0x110 [] sys_read+0x3b/0x60 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2047/stack <== [] sys_rt_sigsuspend+0x98/0xb1 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/20615/stack <== [] do_wait+0x14d/0x1aa [] sys_wait4+0x87/0xa0 [] sys_waitpid+0x13/0x15 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/20617/stack <== [] sys_epoll_wait+0x145/0x1e3 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/20619/stack <== [] pipe_wait+0x4a/0x62 [] pipe_read+0x279/0x2dc [] do_sync_read+0x89/0xc4 [] vfs_read+0x88/0x110 [] sys_read+0x3b/0x60 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2061/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_poll+0x3f/0x88 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/20792/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/20794/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/20802/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2082/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/20902/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2090/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_poll+0x3f/0x88 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/20947/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/209/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/2103/stack <== [] sys_epoll_wait+0x145/0x1e3 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2106/stack <== [] hrtimer_nanosleep+0x82/0xda [] sys_nanosleep+0x44/0x51 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/210/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/2131/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_poll+0x3f/0x88 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/214/stack <== [] hub_thread+0xb32/0xbb9 [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/2161/stack <== [] hrtimer_nanosleep+0x82/0xda [] sys_nanosleep+0x44/0x51 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2164/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_poll+0x3f/0x88 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2167/stack <== [] pipe_wait+0x4a/0x62 [] pipe_read+0x279/0x2dc [] do_sync_read+0x89/0xc4 [] vfs_read+0x88/0x110 [] sys_read+0x3b/0x60 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2170/stack <== [] hrtimer_nanosleep+0x82/0xda [] sys_nanosleep+0x44/0x51 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/217/stack <== [] serio_thread+0x259/0x27f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/2198/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_poll+0x3f/0x88 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/219/stack <== [] worker_thread+0x97/0x22f [] kthread+0x69/0x6e [] kernel_thread_helper+0x6/0x10 [] 0xffffffff ==> /proc/2220/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2250/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2258/stack <== [] sys_pause+0x13/0x1a [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2270/stack <== [] inet_csk_accept+0x9d/0x197 [] inet_accept+0x20/0x9b [] sys_accept4+0xfb/0x1d2 [] sys_socketcall+0x194/0x1a5 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2295/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2317/stack <== [] hrtimer_nanosleep+0x82/0xda [] sys_nanosleep+0x44/0x51 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2398/stack <== [] hrtimer_nanosleep+0x82/0xda [] sys_nanosleep+0x44/0x51 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2406/stack <== [] hrtimer_nanosleep+0x82/0xda [] sys_nanosleep+0x44/0x51 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2414/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_poll+0x3f/0x88 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2415/stack <== [] unix_stream_recvmsg+0x1f8/0x4bd [] sock_aio_read+0x10b/0x115 [] do_sync_read+0x89/0xc4 [] vfs_read+0x98/0x110 [] sys_read+0x3b/0x60 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2423/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_select+0x4f8/0x533 [] core_sys_select+0x1b7/0x252 [] sys_select+0x68/0x84 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2431/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_poll+0x3f/0x88 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2432/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_poll+0x3f/0x88 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2477/stack <== [] hrtimer_nanosleep+0x82/0xda [] sys_nanosleep+0x44/0x51 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2497/stack <== [] poll_schedule_timeout+0x27/0x3e [] do_sys_poll+0x350/0x3cf [] sys_poll+0x3f/0x88 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2510/stack <== [] hrtimer_nanosleep+0x82/0xda [] sys_nanosleep+0x44/0x51 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2517/stack <== [] n_tty_read+0x395/0x5f3 [] tty_read+0x67/0x9e [] vfs_read+0x88/0x110 [] sys_read+0x3b/0x60 [] sysenter_do_call+0x12/0x2d [] 0xffffffff ==> /proc/2519/stack <== [] n_tty_read+0x395/0x5f3 [