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Date: Wed, 9 Aug 2006 00:11:38 +0200
From: "Michal Piotrowski" <michal.k.k.piotrowski@gmail.com>
To: "Andrew Morton" <akpm@osdl.org>
Subject: Re: mm snapshot broken-out-2006-08-08-00-59.tar.gz uploaded
Cc: linux-kernel@vger.kernel.org, "Andi Kleen" <ak@muc.de>,
       "Jan Beulich" <jbeulich@novell.com>
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On 08/08/06, Andrew Morton <akpm@osdl.org> wrote:
> On Tue, 8 Aug 2006 23:19:09 +0200
> "Michal Piotrowski" <michal.k.k.piotrowski@gmail.com> wrote:
>
> > >  You
> > > can look these things up in gdb or using addr2line, provided you have
> > > CONFIG_DEBUG_INFO=y.
> > >
> > >
> >
> > (gdb) list *0xc047d609
> > 0xc047d609 is in start_kernel (/usr/src/linux-work1/init/main.c:577).
> > 572             cpuset_init_early();
> > 573             mem_init();
> > 574             kmem_cache_init();
> > 575             setup_per_cpu_pageset();
> > 576             numa_policy_init();
> > 577             if (late_time_init)
> > 578                     late_time_init();
> > 579             calibrate_delay();
> > 580             pidmap_init();
> > 581             pgtable_cache_init();
>
> hm.
>
> - Try to get the full oops record,

BUG: unable to handle kernel paging request at virtual address 01020304
printing eip:
c041b95c
*pde= 00000000
Oops: 0000 [#1]
4K_STACK PREEMPT SMP
last sysfs file:
Modules linked in:
CPU 0
EIP: 0060: [<c041b95c>] Not tainted VLI
EFLAGS: 00010202
EIP is at kmem_cache_init+0x389/0x3f0
[..]
Call Trace:
[<c0104063>] show_stack_log_lvl+0x8c/0x97
[<c010422b>] show_registers+0x181/0x215
[<c0104481>] die+0x1c2/0x2dd
[<c0117419>] do_page_fault+0x410/0x4f3
[<c02f40a1>] error_code+0x39/0x40
[<c040b604>] start_kernel+0x21f/0x39d
[<c0100210>] 0xc0100210
[..]
EIP: [<c041b95c>] kmem_cache_init+0x389/0x3f0 SS:ESP0068:c0409fc4
<0> Kernel panic - not syncing: Attempted to kill idle task!

(gdb) list *0xc041b95c
0xc041b95c is in kmem_cache_init (/usr/src/linux-work1/mm/slab.c:714).
709                             lockdep_set_class(&l3->list_lock,
&on_slab_l3_key);
710                             alc = l3->alien;
711                             if (!alc)
712                                     continue;
713                             for_each_node(r) {
714                                     if (alc[r])
715                                             lockdep_set_class(&alc[r]->lock,
716                                                  &on_slab_alc_key);
717                             }
718                     }

> find out what the faulting address is
>   ("unable to handle kernel paging request at virtual address xxxx") and
>   see if that lines up with any symbol in .vmlinux.

Did you mean "list 01020304"?

>
> - Might be something bad in numa_policy_init().  I assume you don't have
>   CONFIG_NUMA=y ;)

No, I don't.

>
>
> This'll be hard to diagnose without a full oops trace.
>

Regards,
Michal

-- 
Michal K. K. Piotrowski
LTG - Linux Testers Group
(http://www.stardust.webpages.pl/ltg/wiki/)
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