Re: NetBSD domU + pygrub = panic

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

Jonathan A. Kollasch wrote:
> On Fri, Oct 22, 2010 at 02:23:32PM +0100, Hugo Silva wrote:
> > 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.
>
>
>  
> > 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
>
> > 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.
>
> This seems somewhat like kern/41189. Try not mounting /dev with -o log.
>
>         Jonathan Kollasch


Hi,

Yes, mounting / with nolog "solves" this problem. Thanks for the hint.


I am still unable, though, to use pygrub with the NetBSD domU:
"Error: Boot loader didn't return any data!"


What I did so far is I created a very simple menu.lst (which probably 
isn't even right, I'm not that familiar with grub; but it should at 
least display the menu) on the domU, stored at /grub/menu.lst (domU fs, 
ofc):

timeout=5
color cyan/blue white/blue

title NetBSD-xen
        root (hd0,0)
        kernel /netbsd -1


On the dom0 domU.conf,
bootloader="pygrub"
bootloader_args="--args=--config-file=/grub/menu.lst"

Has anyone, by any chance, have a working NetBSD domU + PyGrub working 
configuration?