[Crash-utility] How to open 32 bit dom0 kdump....

[LI, Feng]

Sorry about the confusion, I don't have any domU guest running...

My grub menu.lst is,
        kernel /boot/xen.gz watchdog=0 dom0_mem=1024M
lowmem_emergency_pool=16M crashkernel=128M at 32M nmi=dom0
        module /boot/vmlinuz-2.6.27.42-0.1.1.xs5.6.0.44.111158xen ro
ramdisk_size=250000 nmi_watchdog=0 xencons=off console=rcons0
        module /boot/initrd-5.6.0-31188p.img

xen.gz is 64 bit one,  while dom0 kernel is 32bit...

I am using echo c > /proc/sysrq-trigger to generate the kernel dump.

When I tried to open the kernel dump,

*[debugger at crash HV_crash]$ crash32 vmlinux-2.6.27
vmcore-2010-09-02-22-30-38*

crash32 5.0.3

……………….

This program has absolutely no warranty.  Enter "help warranty" for details.



WARNING: machine type mismatch:

         crash utility: X86

         vmcore-2010-09-02-22-30-38: X86_64



crash32: vmcore-2010-09-02-22-30-38: not a supported file format





*[debugger at crash HV_crash]$ crash64 vmlinux-2.6.27
vmcore-2010-09-02-22-30-38*

crash64 5.0.3

………………….

WARNING: machine type mismatch:

         crash utility: X86_64

         vmlinux-2.6.27: X86



crash64: vmlinux-2.6.27: not a supported file format



Thanks Dave.





On Fri, Sep 10, 2010 at 3:17 PM, Dave Anderson <anderson at redhat.com> wrote:

>
> ----- "Feng LI" <funglee at gmail.com> wrote:
>
> > Hey you all,
> >
> > I am a kind of new to xen kernel dump analysis. Right now I have a
> > fishy problem. I have generated vmcore dump from dom0 which is 32 bit
> > PAE linux kernel running over 64 bit XEN kernel.
> >
> > BUT, I have diverticulitis to open the vmcore file. If I open it with
> > crash32, crash32 would complain that vmcore is 64 bit image, while
> > crash64 would complain dom0 kernel image is 32 bit.
> >
> > Could any body solve my problem ?
> > Thanks in advance for any help and suggestions.
>
> Can you explain again what your setup is?  I don't understand what
> you mean when you say that you "have generated vmcore dump from dom0
> which is 32 bit PAE linux kernel running over 64 bit XEN kernel".
>
> What crashed -- the 64-bit dom0 kernel or the 32-bit domU guest kernel?
>
> Dave
>
> >
> > Yours
> > Kevin F LI
>
> --
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> Crash-utility at redhat.com
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>
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