process segfaults when returning to home node.

Hi all,
  We've installed the latest patches to 2.6.15.6 and we're testing with the simple awk script.
awk 'BEGIN { for(i=0;i<100000;i++) for(j=0;j<100000;j++);}'
The script migrates away fine but when migrating home it seg faults.

dmesg on the home node:

Badness in local_bh_enable at kernel/softirq.c:140
 [<c012252f>]
 [<c02c4e94>]
 [<c029dade>]
 [<c029a0cc>]
 [<c02fe749>]
 [<c01fa9b2>]
 [<c023efe3>]
 [<c0241a87>]
 [<c0131720>]
 [<c011d720>]
 [<c01e582f>]
 [<c01e5910>]
 [<c01e82de>]
 [<c01e7aed>]
 [<c01e7aed>]
 [<c0104885>]
 [<c0104afc>]
 [<c011d9df>]
 [<c0118261>]
 [<c0117ea0>]
 [<c01043cf>]
 [<c01e7ad9>]
 [<c014f725>]
 [<c01e5c15>]
 [<c01e60a9>]
 [<c01e6922>]
 [<c01e6a07>]
 [<c01e6a27>]
 [<c01e4e55>]
 [<c01e4f9f>]
 [<c01e7d9a>]
 [<c01164a4>]
 [<c01042fc>]
 [<c02fe865>]
 [<c02fd421>]
 [<c02fdf5e>]
 [<c02fe749>]
 [<c01315dc>]
 [<c01e570d>]
 [<c0119da0>]
 [<c0119da0>]
 [<c01e5741>]
 [<c01e7ecf>]
 [<c01e4464>]
 [<c0103f65>]


repeated over and over again.

dmesg on the other node:

[OM] receiving new process
mig_do_recv(): got default
[OMBUG] mig_do_receive: failed
[OMBUG] mig_handle_migration: failed
[OM] receiving new process
[OM] starting process(7037)
remote_do_comm(): got DEP_COMING_HOME
sock_sendmsg: sent 2140 of 4096
sock_sendmsg: sent -32 of 8
[OMBUG] mig_send_pages: failed (addr: 00364000)
[OMBUG] mig_do_send: failed
sock_sendmsg: sent -32 of 8
[OMBUG] task_remote_expel: failed
remote_do_comm(): got default
[OMBUG] remote_do_comm: failed

relevant section in .config:

CONFIG_M586=y
...
# CONFIG_HPET_TIMER is not set
# CONFIG_SMP is not set
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set


help?
thanks,
Matt


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