On Mon, 14 Sep 2009, David Rientjes wrote: > > On PPC64, the parameters behave differently. I couldn't convince it to > > create more than one NUMA node. On x86-64, the NUMA nodes appeared to > > exist and would be visible on /proc/buddyinfo for example but the sysfs > > directories for the fake nodes were not created so nr_hugepages couldn't > > be examined on a per-node basis for example. > > > > I don't know anything about the ppc64 fake NUMA, but the sysfs node > directories should certainly be created on x86_64. I'll look into it > because that's certainly a bug. Thanks. > This works on my machine just fine. For example, with numa=fake=8: $ ls /sys/devices/system/node has_cpu has_normal_memory node0 node1 node2 node3 node4 node5 node6 node7 online possible $ ls /sys/devices/system/node/node3 cpu4 cpu5 cpu6 cpu7 cpulist cpumap distance meminfo numastat scan_unevictable_pages I don't see how this could differ if bootmem is setting up the nodes correctly, which dmesg | grep "^Bootmem setup node" would reveal. The defconfig disables CONFIG_NUMA_EMU now, though, so perhaps it got turned off by accident in your kernel? Let me know if there's any abnormalities with your particular setup. -- To unsubscribe from this list: send the line "unsubscribe linux-numa" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
