[Crash-utility] crash failed on vmcore created by kdump at an IA64

[Jay Lan]

Dave Anderson wrote:
> Jay Lan wrote:
> 
>> Jay Lan wrote:
>>> Hi,
>>>
>>> I saved off a vmcore from a kexec'ed crashkernel at an IA64 Altix.
>>>
>>> When i tried to run crash (4.0-3.5) on the vmcore, it failed.
>>> Is there a known issue?
> 
> Not until now...
> 
> And there doesn't look to be anything in 4.0-3.6, -3.7 and 3.8 that
> will help.
> 
>> Mmm, i built the crash binary myself from the src.rpm. It probably
>> picked up mismatched kernel headers?
>>
> 
> No, crash doesn't use any kernel headers.
> 
> It looks to be a loop-hole in the memory-node-gathering code
> for (newer?) CONFIG_DISCONTIG ia64 kernels.
> 
>>> % crash System.map* vmlinuz-2.6.18-kdump vmcore
>>>
> 
> BTW, did you mis-copy the command line above?  crash can't
> use a compressed *vmlinuz* file, unless it's really a renamed ELF
> binary?  

Yes, it is a ELF 64-bit binary.
(jackhammer,160) file vmlinu*
vmlinuz-2.6.18-kdump: ELF 64-bit LSB executable, IA-64 (Intel 64 bit
architecture), version 1 (SYSV), statically linked, not stripped
(jackhammer,161)

>
In any case, if the vmlinux file you're using matches the
> vmcore dumpfile, there's no need to use the System.map file
> argument; doing so prevents several commands from being
> able to use line numbers.
> 
> Anyway, back to the problem at hand...
> 
> What happens if you apply the attached patch?  (it's against
> the current 4.0-3.8 version, but should apply)

Failed at different location.

Thanks,
 - jay


(jackhammer,157) crash vmlinuz-2.6.18-kdump vmcore

crash 4.0-3.5
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crash(26323): unaligned access to 0x60000000001bf1cc, ip=0x400000000026d0f0
crash(26323): unaligned access to 0x60000000001bf1d4, ip=0x400000000026d0f0
crash(26323): unaligned access to 0x60000000001bf1dc, ip=0x400000000026d0f0
crash(26323): unaligned access to 0x60000000001bf1e4, ip=0x400000000026d0f0
crash(26323): unaligned access to 0x60000000001bf1ec, ip=0x400000000026d0f0
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This GDB was configured as "ia64-unknown-linux-gnu"...


crash: invalid structure member offset: zone_zone_mem_map
       FILE: memory.c  LINE: 11401  FUNCTION: dump_memory_nodes()

[./crash] error trace: => 4000000000231c90

  4000000000231c90: OFFSET_verify+336



> Dave
>