IBM xSeries 336 dual Xeon hangs on boot when APIC enabled

[John Baldwin]

On Monday 14 August 2006 04:45, Arjan van Leeuwen wrote:
> 2006/8/13, Michael Landin Hostbaek <mich at freebsd.org>:
> >
> > Arjan van Leeuwen (avleeuwen) writes:
> > > I'm trying to boot FreeBSD 6.1-RELEASE/amd64 on an IBM xSeries 336
> > machine
> > > with dual Xeons 3.2GHz installed.
> > >
> > > The installation was successful, but
> > > if I try to boot the SMP kernel, it hangs after detection of SCSI and
> > ATA
> > > devices (possibly when doing the initialization of the mpt0 RAID
> > controller,
> > > or when it tries to start the second CPU?).
> > >
> >
> > I've just had a similar problem with an IBM xSeries 232 - it would not
> > boot with apic enabled.. I chased the problem down to the network
> > adapter (fxp) - and when disabling the planar ethernet in BIOS it would
> > boot with SMP.
> 
> 
> Yes! Indeed, the system boots perfectly well if I disable both network
> adapters (bge, see
> dmesg.boot
>  posted earlier). However, I need at least one functioning network adapter...
> 
> I managed to get both NIC and SMP working by disabling a bunch of stuff
> > in the BIOS, fx both serial ports and also the floppy drive.
> 
> 
> ... and this doesn't seem to work for me.
> 
> So:
> 1) Why does my system hang if I enable the network adapter?
> 2) Why does it only hang if APIC is enabled?
> 
> Arjan

Compile DDB into your SMP kernel.  When it 'hangs', break into ddb and run
'show intrcnt' to see if you are having an interrupt storm.

-- 
John Baldwin