slowdown of solrais (kvm-88)

Hi,
my OpenSolaris image (64bit, 2009.06) is slowed down with kvm-88.
It was working with kvm-84 - after downgrade Debian/unstable to Debian/testing + recompiling the kernel + kvm-88 it responds verry slowly (for instance booting, character input.) Seams to me something is going wrong with sync (ticks).
Any ideas how to fix it.
best regards,
Oliver

I figured out that the slowdown is related to the -smp switch.
Without the image boots as expected - with -smp 2 I get the slowdown (input of characters for instance).