[Crash-utility] Problem with using crash 4.0-2.21 on ppc

Hi I tried crash 4.0-2.21 on a 2.6.16-rc4 kernel on a ppc64 machine(Power5). Trying to analyse vmcore(from kdump) gave me the following error: crash: pglist_data.node_mem_map structure member does not exist. crash: certain memory-related commands will fail or display invalid data crash: cannot determine idle task addresses from init_tasks[] or runqueues[] crash: cannot resolve "init_task_union" But I was able to run it ok on a live system. Any thoughts on what could be going wrong? Or am I missing something? Thanks Rachita