A 4xopteron from Sun with 32GB spits lots vm traces. They were not there with SL 9.3 kernel before. The system seem to run stable anyway so far.
The traces appears with kernel-default (IIRC) and kernel-xen.

One example trace:

Badness in vmap_pte_range at mm/vmalloc.c:97

Call Trace: <ffffffff80161f9b>{map_vm_area+836} <ffffffff80101ff8>{init_level4_pgt+4088}
       <ffffffff8016273e>{__vmalloc_area_node+257} <ffffffff802ccbf6>{get_insn_slot+113}
       <ffffffff802cae24>{arch_prepare_kprobe+9} <ffffffff802cc462>{__register_kprobe+435}
       <ffffffff8045fd65>{init_kprobes+44} <ffffffff801081f1>{init+471}
       <ffffffff8010b35e>{child_rip+8} <ffffffff802702ce>{dev_queue_xmit+353}
       <ffffffff8010b356>{child_rip+0}