STI, HLT in acpi_cpu_idle_c1

[Don Bowman]

From: Gerrit Nagelhout [mailto:gnagelhout at sandvine.com]
> John Baldwin wrote:
> > The ACPI C1 state is just a normal hlt.  Only states >= C2 are real 
> > ACPI-specific states.  Gerritt, did these lockups start 
> > happening recently 
> > and are these boxes running -current or are they running 5.2.1?
> > 
> > -- 
> 
> These boxes are running -current (from a couple of weeks ago).  I 
> haven't tried running it on 5.2.1 yet.  We haven't run this
> particular application on anything but -current because there is
> not enough driver & disk support on RELENG_4.
> I am now running the test with hlt disabled, and will let you know
> if it locks up again.

The problem has been there from 5.2.1 Periodically
have done cvs update and repeated.