From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753316AbYLIJAB (ORCPT ); Tue, 9 Dec 2008 04:00:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752143AbYLII7w (ORCPT ); Tue, 9 Dec 2008 03:59:52 -0500 Received: from mail-qy0-f11.google.com ([209.85.221.11]:53490 "EHLO mail-qy0-f11.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752060AbYLII7v (ORCPT ); Tue, 9 Dec 2008 03:59:51 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=mjBvbZEis6ZnvfvxC33hWsEAfhWveS8GJsIh0nPCy7MVPUVQoADZK8PqoOuZP9JA05 swWWPM1d6V1HnurIbGalx3ME3cc5CinYQSYzQyyw2vTmMeqe75ugA0UEnjr8KHp+49ci jhpO5vxZkbtY6rWNCGITxqy+ZUbDia2No3EmY= Message-ID: Date: Tue, 9 Dec 2008 09:59:50 +0100 From: "=?ISO-8859-1?Q?Fr=E9d=E9ric_Weisbecker?=" To: "Ingo Molnar" Subject: Re: [crash] Re: [PATCH 1/3] tracing/function-graph-tracer: introduce __notrace_funcgraph to filter special functions Cc: "Steven Rostedt" , "Linux Kernel" In-Reply-To: <20081209023822.GA3602@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <4939E600.804@gmail.com> <20081208141406.GA14856@elte.hu> <20081208155018.GB405@elte.hu> <20081209023822.GA3602@elte.hu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2008/12/9 Ingo Molnar : > > * Ingo Molnar wrote: > >> yes - but there's a few pending regressions right now delaying the >> reintegration. > > one of them is a new type of ftrace crash that started triggering in > tip/master: > > [ 3.610253] initcall init_stack_trace+0x0/0x12 returned 0 after 105468 usecs > [ 3.616017] calling init_function_trace+0x0/0x12 @ 1 > [ 3.620014] Testing tracer function: <1>BUG: unable to handle kernel paging request at ffffffffffffff89 > [ 3.648007] IP: [] save_rest+0x9/0x70 > [ 3.648007] PGD 203067 PUD 204067 PMD 0 > [ 3.648007] Thread overran stack, or stack corrupted > [ 3.648007] Oops: 0000 [#1] SMP > [ 3.648007] last sysfs file: > [ 3.648007] CPU 0 > [ 3.648007] Pid: 0, comm: swapper Not tainted 2.6.28-rc7-tip-01358-g7c567b4-dirty #6311 > [ 3.648007] RIP: 0010:[] [] save_rest+0x9/0x70 > [ 3.648007] RSP: 0018:ffffffff816fde40 EFLAGS: 00010296 > [ 3.648007] RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 0000000000000003 > [ 3.648007] RDX: 0000000000000000 RSI: ffffffff80218b1c RDI: ffffffff80218acc > [ 3.648007] RBP: ffffffff816fde88 R08: ffffffff8025e538 R09: 0000000000000001 > [ 3.648007] R10: ffffffff80242084 R11: 0000000000000000 R12: 0000000000000001 > [ 3.648007] R13: ffffffff8177f3a0 R14: ffffffff81782390 R15: 0000000000092f70 > [ 3.648007] FS: 0000000000000000(0000) GS:ffffffff816f1b00(0000) knlGS:0000000000000000 > [ 3.648007] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b > [ 3.648007] CR2: ffffffffffffff89 CR3: 0000000000201000 CR4: 00000000000006e0 > [ 3.648007] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 3.648007] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > [ 3.648007] Process swapper (pid: 0, threadinfo ffffffff816fc000, task ffffffff8150d4a0) > [ 3.648007] Stack: > [ 3.648007] ffffffff802112d6 0000000000000000 0000000000000003 0000000000000000 > [ 3.648007] ffffffff816fc010 0000000000000003 ffffffff8025e538 0000000000000001 > [ 3.648007] ffffffff80218ad1 ffffffff816fde98 ffffffff80218b1c ffffffff816fdec8 > [ 3.648007] Call Trace: > [ 3.648007] [] ? ftrace_call+0x5/0x2b > [ 3.648007] [] ? __atomic_notifier_call_chain+0x0/0x87 > [ 3.648007] [] ? constant_test_bit+0x9/0x26 > [ 3.648007] [] need_resched+0x23/0x2d > [ 3.648007] [] poll_idle+0x33/0x42 > [ 3.648007] [] ? atomic_notifier_call_chain+0xf/0x11 > [ 3.648007] [] ? stop_critical_timings+0x9/0x21 > [ 3.648007] [] cpu_idle+0xac/0xe0 > [ 3.648007] [] rest_init+0x66/0x68 > [ 3.648007] [] start_kernel+0x47d/0x488 > [ 3.648007] [] ? early_idt_handler+0x0/0x73 > [ 3.648007] [] x86_64_start_reservations+0xae/0xb2 > [ 3.648007] [] x86_64_start_kernel+0x137/0x146 > [ 3.648007] Code: 00 00 00 75 0b 58 65 48 8b 24 25 30 00 00 00 50 e8 78 6e c7 00 c3 66 66 66 90 66 66 66 90 66 66 66 90 4c 8b 5c 24 38 48 89 5c 24 <38> 48 89 6c 24 30 4c 89 64 24 28 4c 89 6c 24 20 4c 89 74 24 18 > [ 3.648007] RIP [] save_rest+0x9/0x70 > [ 3.648007] RSP > [ 3.648007] CR2: ffffffffffffff89 > [ 3.648007] ---[ end trace 5a5d197966b56a2e ]--- > [ 3.648007] Kernel panic - not syncing: Attempted to kill the idle task! > [ 3.648007] Pid: 0, comm: swapper Tainted: G D 2.6.28-rc7-tip-01358-g7c567b4-dirty #6311 > > Full crashlog and config attached. > > Ingo > Ok I will try this config this evening. Thanks.