BUG: warning at kernel/lockdep.c:581/print_infinite_recursion_bug()

BUG: warning at kernel/lockdep.c:581/print_infinite_recursion_bug()

[keith mannthey]

Hello,
  I was booting 2.6.18-rc6-mm2 with some various lock debug config
options on and I tripped over this during boot.  The system is i386
summit. 


BUG: warning at kernel/lockdep.c:581/print_infinite_recursion_bug()
 [<c1004de9>] dump_trace+0x63/0x1ca
 [<c1004f62>] show_trace_log_lvl+0x12/0x25
 [<c10054d2>] show_trace+0xd/0x10
 [<c100558c>] dump_stack+0x16/0x18
 [<c103c15d>] print_infinite_recursion_bug+0x32/0x39
 [<c103c18b>] find_usage_backwards+0x27/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c1bf>] find_usage_backwards+0x5b/0x80
 [<c103c7b8>] check_usage+0x25/0x1fb
 [<c103d4b0>] __lock_acquire+0x81f/0x96c
 [<c103db21>] lock_acquire+0x45/0x64
 [<c12134fb>] _spin_lock+0x19/0x28
 [<c101ef98>] double_rq_lock+0x26/0x2a
 [<c10205c5>] rebalance_tick+0x17a/0x2c2
 [<c1020a17>] scheduler_tick+0x30a/0x322
 [<c102e336>] update_process_times+0x57/0x63
 [<c1017dd3>] smp_apic_timer_interrupt+0x70/0x79
 [<c100493b>] apic_timer_interrupt+0x33/0x38
DWARF2 unwinder stuck at apic_timer_interrupt+0x33/0x38

Leftover inexact backtrace:

 [<c1002c25>] cpu_idle+0xa6/0xbf
 [<c1016efd>] start_secondary+0x3ce/0x3d9
 [<00000000>] 0x0
 [<f7d95fb0>] 0xf7d95fb0
 =======================

Any ideas?  What debug info is needed to sort this locking bug out?


Thanks,
  Keith