Just a head's up... While tinkering around with a 2.6.22-8 kernel, after applying Ken'ichi's patch to handle to the initialization-time fatal error: crash: invalid size request: 0 type: "__per_cpu_offset" it gets past that problem, but then fails like this: crash: invalid structure member offset: kmem_cache_s_c_num FILE: memory.c LINE: 7042 FUNCTION: kmem_cache_init() [./crash] error trace: 8084dda => 80983a8 => 80ac45e => 8132074 8132074: OFFSET_verify+118 80ac45e: kmem_cache_init+416 80983a8: vm_init+10365 8084dda: main_loop+144 This problem is due to the replacement of the venerable kmalloc slab subsystem in mm/slab.c with the new CONFIG_SLUB in mm/slub.c. There's also the potential of CONFIG_SLOB in mm/slob.c, but it appears that CONFIG_SLUB will be the kmalloc subsystem of the future. This initialization-time failure can be worked around by using the "--no_kmem_cache" command line option. In the short term, I will fix it such that CONFIG_SLUB kernels will be recognized, and kmem_cache_init() will not be called. This obviously breaks "kmem -s", and that command option will need to be completely re-done to deal with this new subsystem. Also, now that the CFS scheduler has been put into place, the "runq" command no longer works. Like "kmem -s" for CONFIG_SLUB, that command will require a new implementation. Dave