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Message-ID: <4602843D.9000306@googlemail.com>
Date: Thu, 22 Mar 2007 14:27:25 +0100
From: Michal Piotrowski <michal.k.k.piotrowski@...il.com>
To: Ingo Molnar <mingo@...e.hu>
CC: Thomas Gleixner <tglx@...utronix.de>,
LKML <linux-kernel@...r.kernel.org>
Subject: 2.6.21-rc4-rt0-kdump (was: Re: [patch] setup_boot_APIC_clock() irq-enable
fix)
Michal Piotrowski napisał(a):
> On 22/03/07, Ingo Molnar <mingo@...e.hu> wrote:
>>
>> * Michal Piotrowski <michal.k.k.piotrowski@...il.com> 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:[<c1610192>] 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:
[<c16af187>] read_from_oldmem+0x73/0x98
[<c19a9cfd>] vmcore_init+0x26c/0xab7
[<c199979b>] init+0xaa/0x287
[<c16044eb>] 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:
----------------------------------------
.. [<c184045a>] .... __spin_lock_irqsave+0x23/0x65
.....[<c1604f8c>] .. ( <= 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 <f3> a5 8b 4d 10 83 e1 03 74 02 f3 a4 e8 cb 10 05 00 89 1c 24 e8
EIP: [<c1610192>] copy_oldmem_page+0x4a/0xd0 SS:ESP 0068:c4d54e18
Kernel panic - not syncing: Attempted to kill init!
[<c160496d>] dump_trace+0x78/0x21a
[<c1604b44>] show_trace_log_lvl+0x35/0x54
[<c16052c4>] show_trace+0x2c/0x2e
[<c160538b>] dump_stack+0x29/0x2b
[<c1618b30>] panic+0x68/0x130
[<c161b67c>] do_exit+0xa1/0x7e3
[<c160516a>] die+0x222/0x24d
[<c1612a3f>] do_page_fault+0x4a1/0x586
[<c1841044>] error_code+0x74/0x7c
[<c1610192>] copy_oldmem_page+0x4a/0xd0
[<c16af187>] read_from_oldmem+0x73/0x98
[<c19a9cfd>] vmcore_init+0x26c/0xab7
[<c199979b>] init+0xaa/0x287
[<c16044eb>] kernel_thread_helper+0x7/0x10
=======================
---------------------------
| preempt count: 00000001 ]
| 1-level deep critical section nesting:
----------------------------------------
.. [<c1618ae6>] .... panic+0x1e/0x130
.....[<c161b67c>] .. ( <= 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/)
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