I'm seeing this message from rt11 while running a multi-threaded test 
that does lots of nanosleeps

expires:   2147484415/829627357
expired:   768/829627357
      at:  608
interval:  0/0
now:       768/829628059
rem:       2147483647/0
overrun:   0
getoffset: 00000000
lt-ownership_ch/1820[CPU#0]: BUG in check_ktimer_signal at 
kernel/ktimers.c:1229 [<c011b747>] __WARN_ON+0x5f/0x98 (8)
 [<c01329d6>] check_ktimer_signal+0x154/0x166 (48)
 [<c0132aab>] ktimer_nanosleep+0xc3/0xe5 (44)
 [<c0132b04>] ktimer_nanosleep_mono+0x37/0x3c (64)
 [<c03bc0d4>] nanosleep_restart_mono+0x0/0x24 (20)
 [<c0132879>] process_ktimer+0x0/0x9 (64)
 [<c0132ba6>] sys_nanosleep+0x61/0x6b (20)
 [<c0103089>] syscall_call+0x7/0xb (28)
---------------------------
| preempt count: 00000001 ]
| 1-level deep critical section nesting:
----------------------------------------
.. [<c013a343>] .... add_preempt_count+0x18/0x1c
.....[<00000000>] ..   ( <= rest_init+0x3feffde0/0x47)

------------------------------
| showing all locks held by: |  (lt-ownership_ch/1820 [ded3b830,  97]):
------------------------------


expires:   2147484426/564549593
expired:   779/564549593
      at:  608
interval:  0/0
now:       779/564550120
rem:       2147483647/0
overrun:   0
getoffset: 00000000
lt-ownership_ch/1820[CPU#0]: BUG in check_ktimer_signal at 
kernel/ktimers.c:1229 [<c011b747>] __WARN_ON+0x5f/0x98 (8)
 [<c01329d6>] check_ktimer_signal+0x154/0x166 (48)
 [<c0132aab>] ktimer_nanosleep+0xc3/0xe5 (44)
 [<c0132b04>] ktimer_nanosleep_mono+0x37/0x3c (64)
 [<c03bc0d4>] nanosleep_restart_mono+0x0/0x24 (20)
 [<c0132879>] process_ktimer+0x0/0x9 (64)
 [<c0132ba6>] sys_nanosleep+0x61/0x6b (20)
 [<c0103089>] syscall_call+0x7/0xb (28)
---------------------------
| preempt count: 00000001 ]
| 1-level deep critical section nesting:
----------------------------------------
.. [<c013a343>] .... add_preempt_count+0x18/0x1c
.....[<00000000>] ..   ( <= rest_init+0x3feffde0/0x47)

------------------------------
| showing all locks held by: |  (lt-ownership_ch/1820 [ded3b830,  97]):
------------------------------


The system then hangs, although the processor fan really kicks into high 
gear as if the system is really doing something.


The .config file is attached.

David