From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751978AbXCVN14 (ORCPT ); Thu, 22 Mar 2007 09:27:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751949AbXCVN14 (ORCPT ); Thu, 22 Mar 2007 09:27:56 -0400 Received: from nf-out-0910.google.com ([64.233.182.189]:33272 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751978AbXCVN1y (ORCPT ); Thu, 22 Mar 2007 09:27:54 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:user-agent:mime-version:to:cc:subject:references:in-reply-to:x-enigmail-version:content-type:content-transfer-encoding:from; b=p6VhXgYI2qJXS4ujYYARmJsL3YfftNzTnlMjNDG74+1vyUsGhQidkPMgXna3PmsQibhZYCzNWOelyIn2iKFad42JdKlNKgYmpJLaRV8/kbt50pyr4sGHgPMOf5Tx70+bfUCFcIxhyzbS+fSv3B0aFVLZ8t3jgExLpt+JVB0eujw= Message-ID: <4602843D.9000306@googlemail.com> Date: Thu, 22 Mar 2007 14:27:25 +0100 User-Agent: Thunderbird 1.5.0.10 (X11/20070302) MIME-Version: 1.0 To: Ingo Molnar CC: Thomas Gleixner , LKML Subject: 2.6.21-rc4-rt0-kdump (was: Re: [patch] setup_boot_APIC_clock() irq-enable fix) References: <6bffcb0e0703211338i2aa6f933ube53c6604c78e285@mail.gmail.com> <20070322093119.GA19394@elte.hu> <6bffcb0e0703220557h7ff64282qf378623452c07d03@mail.gmail.com> In-Reply-To: <6bffcb0e0703220557h7ff64282qf378623452c07d03@mail.gmail.com> X-Enigmail-Version: 0.94.1.1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Michal Piotrowski Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Michal Piotrowski napisał(a): > On 22/03/07, Ingo Molnar wrote: >> >> * Michal Piotrowski wrote: >> >> > Hi Ingo, >> >> > 2.6.21-rc4-rt0 >> >> > BUG: at kernel/fork.c:1033 copy_process() >> >> thanks Michal - this is a real bug that affects upstream too. Find the >> fix below - i've test-booted it and it fixes the warning. > > Problem is fixed, thanks. BTW. It seems that nobody uses -rt as a crash dump kernel ;) BUG: unable to handle kernel paging request at virtual address f7ebf8c4 printing eip: c1610192 *pde = 00000000 stopped custom tracer. Oops: 0000 [#1] PREEMPT Modules linked in: CPU: 0 EIP: 0060:[] Not tainted VLI EFLAGS: 00010206 (2.6.21-rc4-rt0-kdump #3) EIP is at copy_oldmem_page+0x4a/0xd0 eax: 000008c4 ebx: f7ebf000 ecx: 00000100 edx: 00000246 esi: f7ebf8c4 edi: c4c520fc ebp: c4d54e30 esp: c4d54e18 ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068 preempt:00000001 Process swapper (pid: 1, ti=c4d54000 task=c4d52c20 task.ti=c4d54000) Stack: c17ab7e0 c183f982 c1969658 00000400 00000400 00037ebf c4d54e5c c16af187 00037ebf c4c520fc 00000400 000008c4 00000000 00000000 c4c696e0 00000400 c4c520fc c4d54f94 c19a9cfd c4c520fc 00000400 c4d54f78 00000000 c1840996 Call Trace: [] read_from_oldmem+0x73/0x98 [] vmcore_init+0x26c/0xab7 [] init+0xaa/0x287 [] kernel_thread_helper+0x7/0x10 ======================= l *copy_oldmem_page+0x4a/0xd0 0xc1610148 is in copy_oldmem_page (arch/i386/kernel/crash_dump.c:35). 30 * copying the data to a pre-allocated kernel page and then copying to user 31 * space in non-atomic context. 32 */ 33 ssize_t copy_oldmem_page(unsigned long pfn, char *buf, 34 size_t csize, unsigned long offset, int userbuf) 35 { 36 void *vaddr; 37 38 if (!csize) 39 return 0; --------------------------- | preempt count: 00000001 ] | 1-level deep critical section nesting: ---------------------------------------- .. [] .... __spin_lock_irqsave+0x23/0x65 .....[] .. ( <= die+0x44/0x24d) l *0xc184045a 0xc184045a is in __spin_lock_irqsave (kernel/spinlock.c:122). 117 { 118 unsigned long flags; 119 120 local_irq_save(flags); 121 preempt_disable(); 122 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); 123 /* 124 * On lockdep we dont want the hand-coded irq-enable of 125 * _raw_spin_lock_flags() code, because lockdep assumes 126 * that interrupts are not re-enabled during lock-acquire: l *0xc1604f8c 0xc1604f8c is in die (arch/i386/kernel/traps.c:477). 472 473 oops_enter(); 474 475 if (die.lock_owner != raw_smp_processor_id()) { 476 console_verbose(); 477 spin_lock_irqsave(&die.lock, flags); 478 die.lock_owner = smp_processor_id(); 479 die.lock_owner_depth = 0; 480 bust_spinlocks(1); 481 } Code: 10 05 00 c1 e3 05 03 1d 60 8e d6 c1 89 1c 24 e8 fc 33 00 00 89 c3 83 7d 18 00 75 2a 8b 4d 10 c1 e9 02 8b 45 14 8d 34 03 8b 7d 0c a5 8b 4d 10 83 e1 03 74 02 f3 a4 e8 cb 10 05 00 89 1c 24 e8 EIP: [] copy_oldmem_page+0x4a/0xd0 SS:ESP 0068:c4d54e18 Kernel panic - not syncing: Attempted to kill init! [] dump_trace+0x78/0x21a [] show_trace_log_lvl+0x35/0x54 [] show_trace+0x2c/0x2e [] dump_stack+0x29/0x2b [] panic+0x68/0x130 [] do_exit+0xa1/0x7e3 [] die+0x222/0x24d [] do_page_fault+0x4a1/0x586 [] error_code+0x74/0x7c [] copy_oldmem_page+0x4a/0xd0 [] read_from_oldmem+0x73/0x98 [] vmcore_init+0x26c/0xab7 [] init+0xaa/0x287 [] kernel_thread_helper+0x7/0x10 ======================= --------------------------- | preempt count: 00000001 ] | 1-level deep critical section nesting: ---------------------------------------- .. [] .... panic+0x1e/0x130 .....[] .. ( <= do_exit+0xa1/0x7e3) l *0xc1618ae6 0xc1618ae6 is in panic (kernel/panic.c:85). 80 * have preempt disabled. Some functions called from here want 81 * preempt to be disabled. No point enabling it later though... 82 */ 83 preempt_disable(); 84 85 bust_spinlocks(1); 86 va_start(args, fmt); 87 vsnprintf(buf, sizeof(buf), fmt, args); 88 va_end(args); 89 printk(KERN_EMERG "Kernel panic - not syncing: %s\n",buf); l *0xc161b67c 0xc161b67c is in do_exit (include/linux/pid_namespace.h:42). 37 kref_put(&ns->kref, free_pid_ns); 38 } 39 40 static inline struct task_struct *child_reaper(struct task_struct *tsk) 41 { 42 return init_pid_ns.child_reaper; 43 } 44 45 #endif /* _LINUX_PID_NS_H */ http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc4-rt0/kdump-console.log http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc4-rt0/kdump-config NOHZ: local_softirq_pending 02 on CPU#1 NOHZ: local_softirq_pending 02 on CPU#0 NOHZ: local_softirq_pending 08 on CPU#0 NOHZ: local_softirq_pending 02 on CPU#1 NOHZ: local_softirq_pending 10 on CPU#0 NOHZ: local_softirq_pending 02 on CPU#0 NOHZ: local_softirq_pending 02 on CPU#1 NOHZ: local_softirq_pending 08 on CPU#0 CPU0 CPU1 0: 304 0 IO-APIC-edge timer 1: 2319 0 IO-APIC-edge i8042 7: 0 0 IO-APIC-edge parport0 8: 1 0 IO-APIC-edge rtc 9: 1 0 IO-APIC-fasteoi acpi 12: 3 0 IO-APIC-edge i8042 14: 738 0 IO-APIC-edge ide0 15: 3050 0 IO-APIC-edge ide1 16: 23802 0 IO-APIC-fasteoi uhci_hcd:usb2, uhci_hcd:usb5 17: 33123 0 IO-APIC-fasteoi eth1 19: 29280 0 IO-APIC-fasteoi libata, uhci_hcd:usb4 20: 2 0 IO-APIC-fasteoi ehci_hcd:usb1 21: 0 0 IO-APIC-fasteoi uhci_hcd:usb3 22: 38572 0 IO-APIC-fasteoi Intel ICH5 NMI: 0 0 LOC: 351305 268386 ERR: 0 MIS: 0 Hibernation is still broken. http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc4-rt0/console.log http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc4-rt0/rt-config Regards, Michal -- Michal K. K. Piotrowski LTG - Linux Testers Group (PL) (http://www.stardust.webpages.pl/ltg/) LTG - Linux Testers Group (EN) (http://www.stardust.webpages.pl/linux_testers_group_en/)