From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932746AbYEFTxV (ORCPT ); Tue, 6 May 2008 15:53:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760807AbYEFTxE (ORCPT ); Tue, 6 May 2008 15:53:04 -0400 Received: from smtp.enter.net ([216.193.128.24]:3312 "EHLO smtp.enter.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757164AbYEFTxA (ORCPT ); Tue, 6 May 2008 15:53:00 -0400 From: Daniel Hazelton To: Stephen Rothwell Subject: Re: linux-next 5/5 does not boot Date: Tue, 6 May 2008 15:52:54 -0400 User-Agent: KMail/1.9.6 (enterprise 0.20070907.709405) Cc: linux-kernel@vger.kernel.org, linux-next@vger.kernel.org, Ingo Molnar References: <200805052004.33804.dhazelton@enter.net> <20080506153746.0a33d9aa.sfr@canb.auug.org.au> In-Reply-To: <20080506153746.0a33d9aa.sfr@canb.auug.org.au> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200805061552.55692.dhazelton@enter.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday 06 May 2008 01:37:46 Stephen Rothwell wrote: > cc'ing Ingo ... About this error - should I bother trying the 5/6 tree? If I'm going to be stuck with a lock-up during boot I'm wondering if I should try a test before seeing any action on this bug. (I realize I could just turn off the ftrace code, but I am attempting to do some "regular use" testing of the -next tree with new options (well, those that I think might become defaulted to "on") enabled) DRH > On Mon, 5 May 2008 20:04:33 -0400 Daniel Hazelton wrote: > > This may be related to one of the stack dumps I reported earlier as > > occurring when booting the 4/30 linux-next tree... > > > > During two attempted boots of the 5/5 tree using the same config as the > > 4/30 tree the system locked solid at "testing tracer ftrace". > > > > The 4/30 tree produced the following dump (the 5/5 tree locks solid as > > soon as the test is started): > > [ 10.238230] Testing tracer ftrace: <4>------------[ cut here > > ]------------ [ 10.356558] WARNING: at kernel/lockdep.c:2712 > > check_flags+0xfb/0x180() [ 10.356726] Modules linked in: > > [ 10.356915] Pid: 1, comm: swapper Not tainted 2.6.25-next-20080430 #2 > > [ 10.357718] > > [ 10.357722] Call Trace: > > [ 10.357939] [] warn_on_slowpath+0x64/0x90 > > [ 10.358174] [] ? tick_get_tick_sched+0x9/0x30 > > [ 10.358337] [] ? __update_rq_clock+0x68/0x140 > > [ 10.358501] [] ? trace_hardirqs_off+0xd/0x10 > > [ 10.358665] [] ? trace_hardirqs_off+0xd/0x10 > > [ 10.358827] [] ? function_trace_call+0x9e/0xa0 > > [ 10.358992] [] ? ftrace_call+0x5/0x2b > > [ 10.359148] [] ? cpu_clock+0xda/0x190 > > [ 10.359302] [] check_flags+0xfb/0x180 > > [ 10.359457] [] lock_acquire+0x65/0xd0 > > [ 10.359614] [] cpu_clock+0xf9/0x190 > > [ 10.359769] [] ftrace_now+0x9/0x10 > > [ 10.359920] [] trace_function+0xc4/0x260 > > [ 10.360079] [] ? _local_bh_enable+0x63/0xc0 > > [ 10.360240] [] ? sub_preempt_count+0x9/0x90 > > [ 10.360400] [] ? _local_bh_enable+0x63/0xc0 > > [ 10.360561] [] ? sub_preempt_count+0x9/0x90 > > [ 10.360721] [] function_trace_call+0x6c/0xa0 > > [ 10.360883] [] ftrace_call+0x5/0x2b > > [ 10.361038] [] ? sub_preempt_count+0x9/0x90 > > [ 10.361199] [] _local_bh_enable+0x63/0xc0 > > [ 10.361357] [] __do_softirq+0xfe/0x150 > > [ 10.361514] [] call_softirq+0x1c/0x30 > > [ 10.361669] [] do_softirq+0x6a/0xb0 > > [ 10.361823] [] irq_exit+0xa5/0xb0 > > [ 10.361975] [] smp_apic_timer_interrupt+0x9e/0xf0 > > [ 10.362143] [] apic_timer_interrupt+0x6b/0x70 > > [ 10.362301] [] ? > > _spin_unlock_irqrestore+0x68/0x80 > > [ 10.362543] [] ? try_to_wake_up+0xab/0x270 > > [ 10.362704] [] ? ftrace_call+0x5/0x2b > > [ 10.362860] [] ? wake_up_process+0x15/0x20 > > [ 10.362979] [] ? kthread_create+0xa4/0x120 > > [ 10.362979] [] ? do_stop+0x0/0x190 > > [ 10.362979] [] ? mark_held_locks+0x3e/0x80 > > [ 10.362979] [] ? trace_hardirqs_on+0xd/0x10 > > [ 10.362979] [] ? > > trace_hardirqs_on_caller+0xf5/0x1b0 [ 10.362979] [] > > ? lockdep_init_map+0x4b/0x140 [ 10.362979] [] ? > > __spin_lock_init+0x38/0x70 [ 10.362979] [] ? > > init_waitqueue_head+0x24/0x40 [ 10.362979] [] ? > > __ftrace_modify_code+0x0/0xa0 [ 10.362979] [] ? > > __stop_machine_run+0x85/0xf0 [ 10.362979] [] ? > > __ftrace_modify_code+0x0/0xa0 [ 10.362979] [] ? > > __ftrace_modify_code+0x0/0xa0 [ 10.362979] [] ? > > __ftrace_modify_code+0x0/0xa0 [ 10.362979] [] ? > > stop_machine_run+0x33/0x60 [ 10.362979] [] ? > > ftrace_run_update_code+0x20/0x30 [ 10.362979] [] ? > > unregister_ftrace_function+0x14a/0x190 [ 10.362979] > > [] ? tracing_stop_function_trace+0x10/0x20 [ > > 10.362979] [] ? stop_function_trace+0x9/0x20 [ > > 10.362979] [] ? function_trace_ctrl_update+0x17/0x20 [ > > 10.362979] [] ? > > trace_selftest_startup_function+0xae/0x140 > > [ 10.362979] [] ? register_tracer+0x11d/0x1f0 > > [ 10.362979] [] ? init_function_trace+0x10/0x20 > > [ 10.362979] [] ? kernel_init+0x164/0x2f0 > > [ 10.362979] [] ? sub_preempt_count+0x9/0x90 > > [ 10.362979] [] ? _spin_unlock_irq+0x3b/0x60 > > [ 10.362979] [] ? trace_hardirqs_on_thunk+0x3a/0x3f > > [ 10.362979] [] ? > > trace_hardirqs_on_caller+0xf5/0x1b0 [ 10.362979] [] > > ? child_rip+0xa/0x12 > > [ 10.362979] [] ? restore_args+0x0/0x30 > > [ 10.362979] [] ? kernel_init+0x0/0x2f0 > > [ 10.362979] [] ? child_rip+0x0/0x12 > > [ 10.362979] > > [ 10.362979] ---[ end trace 5a5d197966b56a2e ]--- > > [ 10.362979] irq event stamp: 3391956 > > [ 10.362979] hardirqs last enabled at (3391954): [] > > trace_hardirqs_on+0xd/0x10 > > [ 10.362979] hardirqs last disabled at (3391955): [] > > trace_hardirqs_off+0xd/0x10 > > [ 10.362979] softirqs last enabled at (3391956): [] > > __do_softirq+0xfe/0x150 > > [ 10.362979] softirqs last disabled at (3391933): [] > > call_softirq+0x1c/0x30 > > [ 10.376978] kstopmachine used greatest stack depth: 6000 bytes left > > [ 10.377650] PASSED > > > > config for 5/5 tree will be provided on request. Dmesg from 4/30 tree is > > also available. System had not mounted the root drive before the ftrace > > crash, so I have no available logs or dmesg from the 5/5 tree. If asked, > > I will attempt to setup a netconsole and try to capture the logs there. > > > > DRH -- Dialup is like pissing through a pipette. Slow and excruciatingly painful.