lkml.org 
[lkml]   [2011]   [Nov]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: Crash during vmcore_init
From
On Tue, Nov 15, 2011 at 4:14 PM, Dave Young <dyoung@redhat.com> wrote:
>> On Mon, 2011-11-14 at 13:39 +0000, WANG Cong wrote:
>>> On Tue, 11 Oct 2011 16:39:05 -0700, Tim Hartrick wrote:
>>>
>>>> Kexec,
>>>>
>>>> I have been experiencing the crash below on Ubuntu 10.04 running
>>>> 2.6.32-34-server and 2.6.38-8-server as the crashkernel on X86_64. The
>>>> tools are:
>>>>
>>>> kexec-tools 1:2.0.2-1ubuntu3
>>>> makedumpfile        1.3.7-2
>>>> kdump-tools 1.3.7-2
>>>>
>>>> I would be interested to know if this is a known problem and if so
>>>> whether or not there is a patch in the pipeline to correct the problem.
>>>>
>>>> I will be happy to provide any other details that are required including
>>>> debug builds if necessary.
>>> ....
>>>>
>>>> [    1.322100] ioremap: invalid physical address db74000000000000 [
>
>
> Searching db74000000000000 got several similar cases of this, all are
> about per cpu invalid crash_notes address, is this one more?
>

Why it is per cpu crash_note?

I bet Tim is using i386 machine, and on i386 we have,

kexec/arch/i386/crashdump-x86.c

static int get_crash_notes(int cpu, uint64_t *addr, uint64_t *len)
{
char crash_notes[PATH_MAX];
char line[MAX_LINE];
FILE *fp;
unsigned long vaddr;
int count;

sprintf(crash_notes, "/sys/kernel/crash_notes");
fp = fopen(crash_notes, "r");
if (fp) {
<...>
} else
return get_crash_notes_per_cpu(cpu, addr, len);
}

As long as we have .notes section, /sys/kernel/crash_notes exists.
So I see no reason that is per cpu notes stuff.
--
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/

\
 
 \ /
  Last update: 2011-11-15 14:49    [W:1.322 / U:0.132 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site