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

[Gleb Natapov <gleb@redhat.com>]

On Wed, Aug 11, 2010 at 07:29:22AM -0700, Freddie Cash wrote:
> 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).
>
KVM-72 is too old for recent qemu-kvm userspace. Unfortunately our
backwards compatibility does not go so far.

> 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@gmail.com
> --
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--
			Gleb.