Hi,
i have the following problem:
I got a amd opteron server with 32 (4*8) cpus.

Since kvm is only able to created a virtual machine with 16 cpus, i changed KVM_MAX_VCPUS, MAX_VCPUS and MAX_CPUS
as suggested in
http://www.linux-kvm.org/wiki/images/b/be/KvmForum2008$kdf2008_6.pdf

after compiling everything is shows the right number of maximum cpus in the virt-manager,
but it is still not working.

If i start for example my virtual machine with

kvm -m 4 -smp 30 disk0

i get a segmentation fault.
in the logfile it looks like that:

[ 4440.424512] __ratelimit: 18 callbacks suppressed
[ 4440.424523] kvm[7054]: segfault at 1ae5cf6b0 ip 00000000004092ba sp 00007fff3dbb8dc0 error 4 in kvm[400000+1e1000]

Any idee that is missing or what is wrong?

cheers
cornelius