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    SubjectRe: Crash during vmcore_init
    On Tue, Nov 15, 2011 at 4:14 PM, Dave Young <> 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,


    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.
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      Last update: 2011-11-15 14:49    [W:0.021 / U:11.296 seconds]
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