NetBSD domU + pygrub = panic

[Hugo Silva <hugo%barafranca.com@localhost>]

Hello,

While trying to setup a netbsd domU with pygrub, I noticed that my 
5.99.39/amd64 machine immediately panics. This happens every time.


domU configfile: 

----
#kernel = "/usr/pkg/etc/xen/kern/netbsd/5.1_RC4/cacti/netbsd"
bootloader="pygrub"
memory = 1536
name = "cacti"

cpus = "2"
vcpus = 1

vif = [ 'bridge=bridge1' ]

disk = [
   'phy:/dev/mapper/vg0-cacti,0x1,w',
    ]

root = "xbd0"

# use to boot to single user (-s), etc
extra=""
----

Manual copy of the panic follows:

0 rsp ffffa000498a3760
Stopped in pid 296.1 (python 2.6) at netbsd:breakpoint+0x5: leave
breakpoint() at netbsd:breakpoint+0x5
panic() at netbsd:panic+0x28f
kern_assert() at netbsd:kern_assert+0x2d
wapbl_add_buf() at netbsd:wapbl_add_buf+0x36
bdwrite() at netbsd:bdwrite+0xc2
ffs_update() at netbsd:ffs_update+0x1d1
ffs_full_fsync() at netbsd:ffs_full_fsync+0x38f
ffs_fsync() at netbsd:ffs_fsync+0x4b
VOP_FSYNC() at netbsd:VOP_FSYNC+0x34
vinvalbuf() at netbsd:vinvalbuf+0xee
spec_close() at netbsd:spec_close+0x80
VOP_CLOSE() at netbsd:VOP_COSE+0x29
vn_close() at netbsd:vn_close+0x4b
closef() at netbsd:closef+0x6a
fd_close() at netbsd:fd_close+0x211
syscall() at netbsd:syscall+0x92

ds      0x2360
es      0x811d
fs      0x3740
gs      0x967
rdi     0
rsi     0xffffffff809c6000

--db_more--



The USB keyboard doesn't seem to work at this point, and I have no PS/2 
keyboard around.

If it matters, the domU storage runs on lvm on top of a raid-1 (raidframe).

Should it be necessary, I can retrigger the panic with a proper keyboard 
at a later date.

Please advise.