From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756726AbZEOMSU (ORCPT ); Fri, 15 May 2009 08:18:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762733AbZEOMPQ (ORCPT ); Fri, 15 May 2009 08:15:16 -0400 Received: from mail-bw0-f174.google.com ([209.85.218.174]:37687 "EHLO mail-bw0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762730AbZEOMPN (ORCPT ); Fri, 15 May 2009 08:15:13 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; b=WQpftSuFEDbK9+Ha1kywmp/jf1TvkKtgwWiKtx8N2RU5k+94yJXOl1IZIHjAsLRevd 9VYOlo9bB64dP6/+jCUxLmnTb1xbu7ew8QDrN7jNn4VYA1sWXWUBRg98CrdGm54jgJ7h nih1ZPK3qJig2LR9BdaSZM17iUNx3fHuMl8XY= MIME-Version: 1.0 Date: Fri, 15 May 2009 08:15:13 -0400 Message-ID: Subject: kernel softlocks From: Michael Di Domenico To: linux-kernel@vger.kernel.org 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 I have a user application that seems to be soft locking the linux kernel, in this case 2.6.18 Can anyone narrow down whether this is a bug in the linux kernel (and perhaps if so, whether is was fixed in a later version) or not? Or what this user application might have done to create this issue if its not a bug? thanks - Michael BUG: soft lockup detected on CPU#33! Call Trace: [] show_stack+0x40/0xa0 sp=e00000ff000b73d0 bsp=e00000ff000b1818 [] dump_stack+0x30/0x60 sp=e00000ff000b75a0 bsp=e00000ff000b1800 [] softlockup_tick+0x240/0x280 sp=e00000ff000b75a0 bsp=e00000ff000b17b8 [] run_local_timers+0x30/0x60 sp=e00000ff000b75b0 bsp=e00000ff000b17a0 [] update_process_times+0x80/0x100 sp=e00000ff000b75b0 bsp=e00000ff000b1770 [] timer_interrupt+0x180/0x360 sp=e00000ff000b75b0 bsp=e00000ff000b1730 [] handle_IRQ_event+0x90/0x120 sp=e00000ff000b75b0 bsp=e00000ff000b16f0 [] __do_IRQ+0x130/0x420 sp=e00000ff000b75b0 bsp=e00000ff000b16a8 [] ia64_handle_irq+0xf0/0x1a0 sp=e00000ff000b75b0 bsp=e00000ff000b1678 [] __ia64_leave_kernel+0x0/0x280 sp=e00000ff000b75b0 bsp=e00000ff000b1678 [] _spin_unlock_irqrestore+0x30/0x60 sp=e00000ff000b7780 bsp=e00000ff000b1660 [] force_sig_info+0x130/0x160 sp=e00000ff000b7780 bsp=e00000ff000b1620 [] ia64_handle_unaligned+0x2d00/0x2d20 sp=e00000ff000b7780 bsp=e00000ff000b1580 [] ia64_prepare_handle_unaligned+0x30/0x60 sp=e00000ff000b7970 bsp=e00000ff000b1580 [] __ia64_leave_kernel+0x0/0x280 sp=e00000ff000b7b80 bsp=e00000ff000b1580 [] exit_robust_list+0x250/0x2e0 sp=e00000ff000b7d50 bsp=e00000ff000b1518 [] do_exit+0x510/0x14a0 sp=e00000ff000b7d60 bsp=e00000ff000b14c0 [] do_group_exit+0x150/0x160 sp=e00000ff000b7d80 bsp=e00000ff000b1488 [] get_signal_to_deliver+0x740/0x7c0 sp=e00000ff000b7d80 bsp=e00000ff000b1438 [] ia64_do_signal+0x90/0xde0 sp=e00000ff000b7d80 bsp=e00000ff000b1350 [] do_notify_resume_user+0x100/0x160 sp=e00000ff000b7e20 bsp=e00000ff000b1320 [] notify_resume_user+0x40/0x60 sp=e00000ff000b7e20 bsp=e00000ff000b12d0 [] skip_rbs_switch+0xe0/0x110 sp=e00000ff000b7e30 bsp=e00000ff000b12d0 BUG: soft lockup detected on CPU#72! Call Trace: [] show_stack+0x40/0xa0 sp=e00000fbe5e3f3d0 bsp=e00000fbe5e39830 [] dump_stack+0x30/0x60 sp=e00000fbe5e3f5a0 bsp=e00000fbe5e39818 [] softlockup_tick+0x240/0x280 sp=e00000fbe5e3f5a0 bsp=e00000fbe5e397d0 [] run_local_timers+0x30/0x60 sp=e00000fbe5e3f5b0 bsp=e00000fbe5e397b8 [] update_process_times+0x80/0x100 sp=e00000fbe5e3f5b0 bsp=e00000fbe5e39788 [] timer_interrupt+0x180/0x360 sp=e00000fbe5e3f5b0 bsp=e00000fbe5e39748 [] handle_IRQ_event+0x90/0x120 sp=e00000fbe5e3f5b0 bsp=e00000fbe5e39708 [] __do_IRQ+0x130/0x420 sp=e00000fbe5e3f5b0 bsp=e00000fbe5e396c0 [] ia64_handle_irq+0xf0/0x1a0 sp=e00000fbe5e3f5b0 bsp=e00000fbe5e39690 [] __ia64_leave_kernel+0x0/0x280 sp=e00000fbe5e3f5b0 bsp=e00000fbe5e39690 [] ia64_spinlock_contention+0x20/0x60 sp=e00000fbe5e3f780 bsp=e00000fbe5e39690 [] _spin_lock_irqsave+0x60/0x80 sp=e00000fbe5e3f780 bsp=e00000fbe5e39688 [] force_sig_info+0x30/0x160 sp=e00000fbe5e3f780 bsp=e00000fbe5e39648 [] ia64_handle_unaligned+0x2d00/0x2d20 sp=e00000fbe5e3f780 bsp=e00000fbe5e395a8 [] ia64_prepare_handle_unaligned+0x30/0x60 sp=e00000fbe5e3f970 bsp=e00000fbe5e395a8 [] __ia64_leave_kernel+0x0/0x280 sp=e00000fbe5e3fb80 bsp=e00000fbe5e395a8 [] handle_futex_death+0x90/0x1a0 sp=e00000fbe5e3fd50 bsp=e00000fbe5e39568 [] exit_robust_list+0x1f0/0x2e0 sp=e00000fbe5e3fd50 bsp=e00000fbe5e39518 [] do_exit+0x510/0x14a0 sp=e00000fbe5e3fd60 bsp=e00000fbe5e394c0 [] do_group_exit+0x150/0x160 sp=e00000fbe5e3fd80 bsp=e00000fbe5e39488 [] get_signal_to_deliver+0x740/0x7c0 sp=e00000fbe5e3fd80 bsp=e00000fbe5e39438 [] ia64_do_signal+0x90/0xde0 sp=e00000fbe5e3fd80 bsp=e00000fbe5e39350 [] do_notify_resume_user+0x100/0x160 sp=e00000fbe5e3fe20 bsp=e00000fbe5e39320 [] notify_resume_user+0x40/0x60 sp=e00000fbe5e3fe20 bsp=e00000fbe5e392d0 [] skip_rbs_switch+0xe0/0x110 sp=e00000fbe5e3fe30 bsp=e00000fbe5e392d0 BUG: soft lockup detected on CPU#104! Call Trace: [] show_stack+0x40/0xa0 sp=e00000fc4b03f7d0 bsp=e00000fc4b039730 [] dump_stack+0x30/0x60 sp=e00000fc4b03f9a0 bsp=e00000fc4b039718 [] softlockup_tick+0x240/0x280 sp=e00000fc4b03f9a0 bsp=e00000fc4b0396d8 [] run_local_timers+0x30/0x60 sp=e00000fc4b03f9b0 bsp=e00000fc4b0396c0 [] update_process_times+0x80/0x100 sp=e00000fc4b03f9b0 bsp=e00000fc4b039690 [] timer_interrupt+0x180/0x360 sp=e00000fc4b03f9b0 bsp=e00000fc4b039650 [] handle_IRQ_event+0x90/0x120 sp=e00000fc4b03f9b0 bsp=e00000fc4b039610 [] __do_IRQ+0x130/0x420 sp=e00000fc4b03f9b0 bsp=e00000fc4b0395c0 [] ia64_handle_irq+0xf0/0x1a0 sp=e00000fc4b03f9b0 bsp=e00000fc4b039590 [] __ia64_leave_kernel+0x0/0x280 sp=e00000fc4b03f9b0 bsp=e00000fc4b039590 [] dispatch_unaligned_handler+0x2a0/0x400 sp=e00000fc4b03fb80 bsp=e00000fc4b039580 [] exit_robust_list+0x1f0/0x2e0 sp=e00000fc4b03fb80 bsp=e00000fc4b039530