We have seen several issues recently on powerpc LPARs with memoryless node NUMA configurations, e.g. (an extreme case): numactl --hardware available: 2 nodes (0,3) node 0 cpus: node 0 size: 0 MB node 0 free: 0 MB node 3 cpus: 0 1 2 3 node 3 size: 8142 MB node 3 free: 7765 MB node distances: node 0 3 0: 10 20 3: 20 10 powerpc doesn't set CONFIG_HAVE_MEMORYLESS_NODES, so we are missing out on a lot of the core-kernel support necessary. This series attempts to fix this by enabling the config option, which requires a few other changes as well. 1/3: mm: return NUMA_NO_NODE in local_memory_node if zonelists are not setup 2/3: powerpc: enable CONFIG_HAVE_PERCPU_NUMA_NODE_ID 3/3: powerpc: enable CONFIG_HAVE_MEMORYLESS_NODES I have tested this series with Christoph's patch (currently being discussed): http://www.spinics.net/lists/linux-mm/msg69452.html Thanks, Nish -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>