CPU time accounting broken on 8-STABLE machine after a few hours of uptime

[Jeremy Chadwick]

On Wed, Sep 29, 2010 at 12:39:49AM -0700, Don Lewis wrote:
> On 29 Sep, Jeremy Chadwick wrote:
> 
> > Given all the information here, in addition to the other portion of the
> > thread (indicating ntpd reports extreme offset between the system clock
> > and its stratum 1 source), I would say the motherboard is faulty or
> > there is a system device which is behaving badly (possibly something
> > pertaining to interrupts, but I don't know how to debug this on a low
> > level).
> 
> Possible, but I haven't run into any problems running -CURRENT on this
> box with an SMP kernel.
> 
> > Can you boot verbosely and provide all of the output here or somewhere
> > on the web?
> 
> <http://people.freebsd.org/~truckman/AN-M2_HD-8.1-STABLE-verbose.txt>
> 
> > If possible, I would start by replacing the mainboard.  The board looks
> > to be a consumer-level board (I see an nfe(4) controller, for example).
> 
> It's an Abit AN-M2 HD.  The RAM is ECC.  I haven't seen any machine
> check errors in the logs.  I'll run prime95 as soon as I have a chance.

Thanks for the verbose boot.  Since it works on -CURRENT, can you
provide a verbose boot from that as well?  Possibly someone made some
changes between RELENG_8 and HEAD which fixed an issue, which could be
MFC'd.

-- 
| Jeremy Chadwick                                   jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |