[kvm-devel] kvm 35 and 36 segfault when smp 2 or more

[Gianluca C. <gia...@gm...>]

System is a quadcore intel with Fedora 7 x86_64
tried with latest ok kernel 2.6.22.4-65.fc7 and the one in testing:
2.6.22.5-71.fc7
tried with latest kvm 24 in F7, then with kvm-35 in testing then compiling
kvm-36 (with same .spec of fedora one)
qemu-kvm -cdrom F-7.90-x86_64-rescuecd.iso -boot d -smp 1
is ok (also without smp switch at all that should be the same)
with -smp 2
I get
kvm_create_vcpu: Invalid argument
kvm_get_msrs FAILED: Invalid argument
kvm_set_msrs FAILED: Invalid argument
Segmentation fault
and in dmesg
Sep  5 00:04:20 localhost kernel: qemu-kvm[3655]: segfault at
0000000000000000 r
ip 00000000004de19d rsp 00000000409fff90 error 6

with -smp 3 one more kvm_create_vcpu: Invalid argument error and
qemu-kvm[4102]: segfault at 0000000000000000 rip 00000000004de19d rsp
0000000041400f90 error 6

the same for example with x86 winxp iso img
qemu-system-x86_64 works ok and if I go in console and do "info cpus"
I can find
* cpu#0: pc=0x000000000000e84
  cpu#1: pc=0x0000000000010009 (halted)

any hints on having kvm smp guest working?

BTW: in one thread of this list I saw that, if I understood right, it should
be safe now not to use --with-patched-kernel with kernels greater than
2.6.22 (as mine is) and that this was valid when kvm was only in -mm tree
In Fedora spec the configure step is yet
./configure --with-patched-kernel --qemu-cc=gcc34 --kerneldir=$(pwd)/kernel
--prefix=%{_prefix}

and my failing kvm rpms are configured this way
but if I use instead
./configure  --qemu-cc=gcc34  --prefix=%{_prefix}
I finally get a message like
error: Installed (but unpackaged) files found:
with the compiled kvm kernel modules in the list.....
so it seems that it tries to overwrite your kernel ones...??? but shouldn't
they be ok????
or I don't understand

and if I use
./configure --qemu-cc=gcc34 --kerneldir=$(pwd)/kernel --prefix=%{_prefix}

the build process goes in an infinite loop (forks I presume) where if I
don't press Ctrl-C in time, the system freezes and I have to manually press
power switch to shutdown....
Thanks for your help,
Gianluca