kdump: quad core Opteron

[Bernhard Walle]

* Chandru [2008-10-07 18:21]:
>
> kdump on a quad core Opteron blade machine doesn't give a complete 
> vmcore on the system.   All works well until we attempt to copy 
> /proc/vmcore to some target place ( disk , n/w ). The system immediately 
> resets without any OS messages after having copied few mb's of vmcore 
> file.  Problem also occurs with 2.6.27-rc8 and latest kexec-tools.  If 
> we pass 'mem=4G' as boot parameter to the first kernel, then kdump 
> succeeds in copying a readable vmcore to /var/crash.

Maybe extend the copy process to print out the address, and then look
at which address it crashes. Then look in the memory map, maybe there's
something special there.

Regards,
Bernhard
-- 
Bernhard Walle, SUSE Linux Products GmbH, Architecture Development