Kernel panic on FreeBSD 8.0 RELEASE when starting kernel

[Deploy IS INFO]

G VM wrote:
>   Deploy IS INFO wrote:
>  > Hi,
>  >
>  > You can run (in theory) any FreeBSD on a hardware that has HVM
>  > support. You can check that with xm info. You can only run FreeBSD 8
>  > as a PV guest with 32bit arch and hvm-pv with amd64. For the pv or the
>  > hvm-pv mode you have to compile the XEN (for 32bit) or XENHVM (amd64)
>  > kernel config.
>  >
>  > You'll have to install FreeBSD as a hvm guest and after a successful
>  > install you may go on with the above mentioned kernels.
>  >
>  > For pv mode use only 1 vcpu and max 2 for hvm-pv.
>  >
>  > Regards,
>  > Andras
>  >
>  > G VM wrote:
>  >> Justin T. Gibbs wrote:
>  >>> On 1/24/2010 4:54 PM, G VM wrote:
>  >>>
>  >>>> Hi all,
>  >>>>
>  >>>> I wanted to try running FreeBSD as a guest os.
>  >>>>
>  >> I followed the instructions on this url.
>  >> http://www.ita.com.ua/eng/articles.htm?id=34
>  >>
>  >> I am not sure what Xen exactly does. Does it uses the kernel on the
>  >> dom0? Or does it both uses the bsd kernel on the dom0 and a modified
>  >> kernel on domU?
>  >> I do not have a done:
>  >>
>  >> make buildkernel KERNCONF=/XEN
>  >>
>  >> Is this necessary? I thought xen support was included in the kernel.
>  >>
>  >> Do note the instructions I followed. I used those.
>  >> /
>  >>
>  >>
>  >>
>  >> _______________________________________________
>  >> freebsd-xen at freebsd.org mailing list
>  >> http://lists.freebsd.org/mailman/listinfo/freebsd-xen
>  >> To unsubscribe, send any mail to "freebsd-xen-unsubscribe at freebsd.org"
>  >
>  >
> # xm info
> host : backupserver
> release : 2.6.18-164.9.1.el5xen
> version : #1 SMP Tue Dec 15 21:31:37 EST 2009
> machine : x86_64
> nr_cpus : 2
> nr_nodes : 1
> cores_per_socket : 2
> threads_per_core : 1
> cpu_mhz : 2210
> hw_caps :
> 178bf3ff:ebd3fbff:00000000:00000010:00002001:00000000:0
> 000001f:00000000
> virt_caps : hvm
> total_memory : 2046
> free_memory : 512
> node_to_cpu : node0:0-1
> node_to_memory : node0:512
> xen_major : 3
> xen_minor : 4
> xen_extra : .2
> xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
> hvm-3.0-x
> 86_32p hvm-3.0-x86_64
> xen_scheduler : credit
> xen_pagesize : 4096
> platform_params : virt_start=0xffff800000000000
> xen_changeset : unavailable
> cc_compiler : gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)
> cc_compile_by : root
> cc_compile_domain : gitco.tld
> cc_compile_date : Wed Nov 11 21:16:28 CET 2009
> xend_config_format : 4
> 
> So this seems ok.
> 
> My dom0 is x86_64.
> Does this mean I have to use hvm-pv (XENHVM) -> FreeBSD amd64 install?
> Or can I run the i386 pv (XEN) on a 64 bit dom0 too?
> Does this also needs a copy of the compiled kernel to the dom0?
> 
> Do note that the default 8.0-RELEASE cd does panic (this is part of the
> config, when trying to do a normal install to compile the new kernel
> (that is why I used VMware to compile the kernel)):
> ...
> 
> builder = "hvm"
> kernel = "/usr/lib/xen/boot/hvmloader"
> device_model = "/usr/lib64/xen/bin/qemu-dm"
> 
> ...
> 

Hi,

You can any guests arch that fits into the xm info's xen cap line, so a 
32bit pv guest is not a problem for you. We use the following example 
config:

kernel = "/usr/lib/xen/boot/hvmloader"
#kernel = "/path/to/pvkernel"
builder='hvm'
memory = 1024
name = "FreeBSD8"
vif = [ '' ]
disk = [ 'phy:/dev/volgroup/freebsd-lv-rootfs,hda,w', 
'file:/path/to/8.0-RELEASE-amd64-disc1.iso,hdd:cdrom,r' ]
boot="cda"
vnc=1
vncpasswd='ihavepassword'
#vcpus='2'

The commented parts are should be tried only after a succesful install 
and of course the amd64 iso could be an i386 also. Under 3.3.1 Xen it 
works one a X2270 test server and a x2250 prod server.

Regards,
Andras