I have been fighting with a problem with kvm-86 now for a while and I
wanted to see if this was a known issue or anyone had suggestions as
to where to look. These tests are being run on an Intel Core 2 Quad
Q8400 with 4GB of RAM. The host OS is Ubuntu 9.04 using the
2.6.28-11-server kernel that comes with Ubuntu 9.04. I've narrowed
the problem down to kvm-86 not running 64 bit kernels in 64bit mode.
I have been testing with the stock Ubuntu 9.04 64-bit server kernel
"vmlinuz-2.6.28-11-server". The minimal command I've been able to use
to reproduce this is:
sudo kvm -M pc -cpu qemu64 -kernel /boot/vmlinuz-2.6.28-11-server
-vnc 0.0.0.0:0
With the kernel modules and userland from both kvm-84 and kvm-85
(compiled with the same options which just say --prefix=/usr and
--kerneldir=<my kernel source>) these options work fine and the kernel
starts up. I'm not passing any filesystem so it hangs, but it boots.
With kvm-86 and the same options/configuration, the kernel refuses to
boot with the error message:
"This kernel requires an x86-64 CPU, but only detected an i686 CPU.
Unable to boot - please use a kernel appropriate for your CPU."
it works on all 3 versions when I add the -no-kvm option.
I have also tested this on an AMD Athlon 64 X2 4200+ CPU. On that
machine, all three of the kvm versions tested worked correctly both
with and without the -no-kvm option. I used the same binaries, the
same kernel and same set of modules on both systems, just kvm_intel
loaded on one and kvm_amd on the other.
Is there a known issue with the kvm_intel module in kvm-86 and 64bit
guests? If not, any suggestions as to what I should look at next?
Thanks,
-Josh
--
Josh Wilsdon
LayerBoom Systems
joshw@xxxxxxxxxxxxx
http://layerboom.com
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