segmentation fault in numa_node_to_cpus_v1

Hi,

I'm trying to run the HotSpot Java VM on an SGI UV 1000 with 4096
cores.  When I enable the NUMA-aware garbage collection algorithm, I
get a segmentation fault as the virtual machine is initializing.  The
sigsegv is occurring at one of the memcpy's in numa_node_to_cpus_v1,
although I'm afraid I can't determine whether libnuma is being called
correctly or incorrectly.  I am testing on a system that has numactl
2.0.5.

Thanks,
--Michael

#6  <signal handler called>
#7  0x00007f4066fb9ad0 in memcpy () from /lib64/libc.so.6
#8  0x00007f40658d4c6a in numa_node_to_cpus_v1 (node=132, buffer=0x40112d40,
   bufferlen=<value optimized out>) at libnuma.c:1203
#9  0x00007f4066a85255 in os::Linux::rebuild_cpu_to_node_map() ()
  from /usr/ue/0/mspiegel/jdk1.6.0_22/jre/lib/amd64/server/libjvm.so
#10 0x00007f4066a8502f in os::Linux::libnuma_init() ()
  from /usr/ue/0/mspiegel/jdk1.6.0_22/jre/lib/amd64/server/libjvm.so
#11 0x00007f4066a86c38 in os::init_2() ()
  from /usr/ue/0/mspiegel/jdk1.6.0_22/jre/lib/amd64/server/libjvm.so
#12 0x00007f4066b81c4d in Threads::create_vm(JavaVMInitArgs*, bool*) ()
  from /usr/ue/0/mspiegel/jdk1.6.0_22/jre/lib/amd64/server/libjvm.so