kern/175822: FreeBSD 9.1 does not work with Xen 4.0

[Jeroen van der Ham]

>Number:         175822
>Category:       kern
>Synopsis:       FreeBSD 9.1 does not work with Xen 4.0
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Feb 04 11:50:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Jeroen van der Ham
>Release:        9.1
>Organization:
>Environment:
>Description:
I've been trying various things in my current setup with FreeBSD 9.1, but to no avail currently.
I have tried to boot the 9.1 boot-only DVD using XEN HVM on an AMD Opteron system, with kernel 2.6.32 on Dom0, using 4.0.1-2:

kernel = '/usr/lib/xen-4.0/boot/hvmloader'
device_model = '/usr/lib/xen-4.0/bin/qemu-dm'
builder = 'hvm'
memory = 512
shadow_memory = 8
vcpus = 4
cpus = "2-7"
name = "image01"
disk = [
'file:/xen/staging/FreeBSD-9.1-RELEASE-amd64-bootonly.iso,hdc:cdrom,r',
'phy:/dev/xendata/image,hda,w',
]
boot = 'd'
sdl=0
stdvga=0
serial='pty'



This boots, and then goes into a loop printing "pudna: fpcurthread == curthread xx times" when it tries to mount the filesystem.
I have tried the exact same setup with the similar 9.0 DVD, and this boots just fine.
>How-To-Repeat:
Use the above configuration to create a XEN HVM instance. The physical filesystem is not even necessary to trigger the error.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: