Debian 5.0 host, qemu-kvm 0.12.4, unable to use -smp > 1

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We just upgraded our KVM host system from KVM-72 to qemu-kvm 0.12.4
(debian lenny backports).  We are now unable to start any VMs that use
-smp option with values > 1 (-smp 1 works, -smp 2 doesn't).
Everything else is the same (nothing in the guests was changed,
nothing else on the host was changed).

Hardware:
  Tyan h2000M motherboard
  2x dual-core AMD Opteron 2200-series CPUs @ 2 GHz
  16 GB DDR2 SDRAM
  3Ware 9550SXU-12ML RAID controller
  12x 500 GB SATA harddrives in RAID6
  Intel PRO/1000MT quad-port gigabit NIC (bonded into kvmbr0)

  Debian 5.0 (Lenny) amd64

Everything was working great with KVM-72 with the exception of virtio
block device drivers (memory leak).

We have several Debian/Ubuntu and Windows XP/2003 VMs running on here
with various amounts of RAM.  And 1 VM that was running with -smp 2
that is now running with -smp 1.

I've tested -smp 1,cores=2 and it will boot, but only shows 1 CPU.
Using any value other than 1 for -smp causes the kvm process to start
(shows in ps output) but never run (no CPU usage in top, no VNC
connection, no errors, just nothing).

Not sure how to diagnose this one.  Any ideas?


-- 
Freddie Cash
fjwcash@xxxxxxxxx
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