I'm trying to get suspend/resume working properly on my Thinkpad X60.
This is a dual-core machine, so its running in SMP mode.

Now that I have a set of patches to make AHCI resume properly, I'm
getting a crash on the second suspend.  I can't get an actual listing of
the oops, but I have a set of screenshots if anyone needs more details.

The gist is that there's a BUG_ON failing at arch/i386/kernel/nmi.c:174
(BUG_ON(counter > NMI_MAX_COUNTER_BITS)), in release_evntsel_nmi.  The
backtrace is:

     release_evntsel_nmi
     stop_apci_nmi_watchdog
     on_each_cpu
     disable_lapic_nmi_watchdog
     lapic_nmi_suspend
     sysdev_suspend
     device_power_down
     suspend_enter
     enter_state
     state_store
     subsys_attr_store
     sysfs_write_file
     vfs_write
     sys_write
     sysenter_past_esp

This happens after all the devices have suspended themselves; then
there's a longish pause (several seconds), and the oops appears.  The
first suspend is very quick.

Everything works as expected when I disable nmi watchdog with
nmi_watchdog=0 on the kernel command line.

dmesg after a single successful suspend/resume cycle attached.
(resent without .config to get under linux-kernel's size limit; mail if 
you want a copy)

     J