Description of problem:
Got the following during shutdown:

Dec  1 15:44:06 localhost kernel: BUG: warning at
kernel/cpu.c:56/unlock_cpu_hotplug() (Tainted: P     )
Dec  1 15:44:06 localhost kernel:  [<c04051db>] dump_trace+0x69/0x1af
Dec  1 15:44:06 localhost kernel:  [<c0405339>] show_trace_log_lvl+0x18/0x2c
Dec  1 15:44:06 localhost kernel:  [<c04058ed>] show_trace+0xf/0x11
Dec  1 15:44:06 localhost kernel:  [<c04059ea>] dump_stack+0x15/0x17
Dec  1 15:44:06 localhost kernel:  [<c043c27c>] unlock_cpu_hotplug+0x46/0x6f
Dec  1 15:44:06 localhost kernel:  [<f8f7e2a7>] do_dbs_timer+0x127/0x16b
[cpufreq_ondemand]
Dec  1 15:44:06 localhost kernel:  [<c0433c38>] run_workqueue+0x83/0xc5
Dec  1 15:44:06 localhost kernel:  [<c0434528>] worker_thread+0xd9/0x10d
Dec  1 15:44:06 localhost kernel:  [<c04369fb>] kthread+0xc0/0xed
Dec  1 15:44:06 localhost kernel:  [<c0404dab>] kernel_thread_helper+0x7/0x10
Dec  1 15:44:06 localhost kernel: DWARF2 unwinder stuck at
kernel_thread_helper+0x7/0x10
Dec  1 15:44:06 localhost kernel: Leftover inexact backtrace:
Dec  1 15:44:06 localhost kernel:  =======================

Sorry for the 'tainted'. This is from VMware.

This is intermittent; haven't be able to reproduce with or without VMware.

Version-Release number of selected component (if applicable):
kernel-2.6.18-1.2849.fc6

How reproducible:
Intermittent

Steps to Reproduce:
1. Shutdown from gnome.
2. The above displays for a second or so on console before normal shutdown messages
3.
  
Actual results:


Expected results:


Additional info: