Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753566AbYGIRiu (ORCPT ); Wed, 9 Jul 2008 13:38:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750885AbYGIRin (ORCPT ); Wed, 9 Jul 2008 13:38:43 -0400 Received: from rv-out-0506.google.com ([209.85.198.230]:51114 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750792AbYGIRim (ORCPT ); Wed, 9 Jul 2008 13:38:42 -0400 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=Pr7pGAWgIq/ThQBOvBmsgdI8SyFnZVuwWg1kNUt+JE8sFb0OmEPLiR1mjSqpsgZ4iy 9QpgK4Y/lJpxBkmbxkb1B25mkKoIiOaW3XQtCdkn2HUeapwjGjKcrY3SjiwHqxhhX6wI 3wXVvzqwkOtio7Sk0C7iDfUpHQl3smVoYgZLk= Message-ID: <86802c440807091038m6c14f165xede8b2b0316d0225@mail.gmail.com> Date: Wed, 9 Jul 2008 10:38:41 -0700 From: "Yinghai Lu" To: akataria@vmware.com Subject: Re: [PATCH 05/05] x86: Rename paravirtualized TSC functions Cc: "Ingo Molnar" , "Thomas Gleixner" , "the arch/x86 maintainers" , "Daniel Hecht" , LKML In-Reply-To: <1215624603.3930.8.camel@alok-dev1> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1214937816.20191.34.camel@promb-2n-dhcp368.eng.vmware.com> <20080709061336.GG9760@elte.hu> <86802c440807090020q516b6332qf8e0d65918e7001e@mail.gmail.com> <1215624603.3930.8.camel@alok-dev1> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4056 Lines: 90 On Wed, Jul 9, 2008 at 10:30 AM, Alok Kataria wrote: > On Wed, 2008-07-09 at 00:20 -0700, Yinghai Lu wrote: >> On Tue, Jul 8, 2008 at 11:13 PM, Ingo Molnar wrote: >> > >> > * Alok Kataria wrote: >> > > >> got >> calling ixgb_init_module+0x0/0x76 >> Intel(R) PRO/10GbE Network Driver - version 1.0.126-k4 >> Copyright (c) 1999-2006 Intel Corporation. >> vendor=1022 device=7458 >> ACPI: PCI Interrupt 0000:0c:01.0[A] -> GSI 56 (level, low) -> IRQ 56 >> ixgb: eth18: ixgb_probe: Intel(R) PRO/10GbE Network Connection >> BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 >> IP: [] hrtick_start_fair+0x89/0x173 >> PGD 0 >> Oops: 0000 [1] SMP >> CPU 4 >> Modules linked in: >> Pid: 103, comm: events/4 Not tainted 2.6.26-rc9-tip-00026-geae1aa0-dirty #240 >> RIP: 0010:[] [] >> hrtick_start_fair+0x89/0x173 >> RSP: 0018:ffff88082481fbd0 EFLAGS: 00010046 >> RAX: 0000000000000000 RBX: ffff880824828000 RCX: 0000000000000006 >> RDX: ffff88084423e700 RSI: ffff880824828000 RDI: ffff88084423e700 >> RBP: ffff88082481fc00 R08: 0000000000000000 R09: 0000000000000000 >> R10: 0000000000000000 R11: 0000000000000000 R12: ffff88084423e700 >> R13: ffff880844239700 R14: ffff880824828000 R15: 0000000000000c1a >> FS: 0000000000000000(0000) GS:ffff881024c39600(0000) knlGS:0000000000000000 >> CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b >> CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000006e0 >> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 >> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 >> Process events/4 (pid: 103, threadinfo ffff88082481e000, task ffff880824814230) >> Stack: ffff880844248118 000000005c0ee9e3 ffff880844239700 ffff88082490d878 >> ffff88084423e700 0000000000000000 ffff88082481fc40 ffffffff80256591 >> ffff88082481fc30 ffffffff80516fc5 000000005c0ee9e3 ffff88082490d840 >> Call Trace: >> [] dequeue_task_fair+0x5f/0x7e >> [] ? __first_cpu+0x26/0x49 >> [] dequeue_task+0xce/0xf0 >> [] deactivate_task+0x31/0x50 >> [] pull_task+0x2c/0x78 >> [] load_balance_fair+0x18d/0x277 >> [] schedule+0x3db/0x962 >> [] ? vmstat_update+0x0/0x5e >> [] ? schedule_delayed_work+0x31/0x48 >> [] worker_thread+0xbb/0x114 >> [] ? autoremove_wake_function+0x0/0x63 >> [] ? worker_thread+0x0/0x114 >> [] kthread+0x61/0xa4 >> [] ? schedule_tail+0x36/0x81 >> [] child_rip+0xa/0x11 >> [] ? kthread+0x0/0xa4 >> [] ? child_rip+0x0/0x11 >> >> >> Code: c3 80 e8 86 04 01 00 80 3d 76 52 c0 00 00 0f 89 e1 00 00 00 41 >> f6 84 24 70 08 00 00 04 0f 85 d2 00 00 00 49 8b 84 24 a8 08 00 00 <48> >> 8b 00 83 b8 c0 00 00 00 00 0f 84 ba 00 00 00 49 83 7d 10 01 >> RIP [] hrtick_start_fair+0x89/0x173 >> RSP >> CR2: 0000000000000000 >> ---[ end trace c05d5c1f5b126388 ]--- >> >> yesterday tip/mater with tip/x86/modules >> tip-history-2008-07-08_16.08_Tue works well. >> >> others traps merge seems not to cause the problem.. >> > > Hi Yinghai, > > Are we sure that these patches cause this null pointer dereference ? > The panic in scheduler seems to be totally disconnected to the changes > that these patches make. The only scheduler bit that we touch is the > sched_clock thingy....but that too looks harmless to me. > > Can you please bisect and see if the first patch in the series is the > problem ? tries last night, it seems pgtable related patches cause that. YH -- 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/