Just a heads-up to those who may be running with bleeding-edge upstream kernels that have this commit: commit bf0dea23a9c094ae869a88bb694fbe966671bf6d Author: Joonsoo Kim <iamjoonsoo.kim(a)lge.com&gt; Date: Thu Oct 9 15:26:27 2014 -0700 mm/slab: use percpu allocator for cpu cache This change will cause the crash session to fail during initialization if the target kernel is configured with CONFIG_SLAB. I haven't tried it, but it looks like it would fail with an invalid structure member offset message w/respect to "kmem_cache_s_array". To work around it, you could try using the --no_kmem_cache command line option. Since RHEL and Fedora use CONFIG_SLUB, it wouldn't be an issue with those distributions. Dave