Hi!
I have attached a patch, which lets me NetBSD/Xen Dom0 boot
with root on nfs.
Just pass bootdev=<dev> ip=... and nfsroot=... to the
dom0 kernel in GRUB
in the same format as in a config file for a DomU.
I don't know, where this "boot device:
<unknown>" comes from, even with bootdev
specified, but at least it works.
If this bootdev is fixed, then booting from nfs is almost
identical with Linux. Linux additionally supports ip=dhcp.
I also had to increase the max length of parseable
commandline in order
to not truncate the string. The ip=... field is already a
long string
and when you have a long nfsroot=... field, then you don't
mount what you want.
Below is a snippet from my boot messages.
Please review and apply the patch.
Tnx,
Christoph
[...]
Kernelized RAIDframe activated
xenbus0: using event channel 16
atapibus0 at atabus4: 2 targets
cd0 at atapibus0 drive 1: <LITE-ON DVD SHD-16P1S, ,
GS05> cdrom removable
cd0: 32-bit data port
cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2
(Ultra/33)
wd0 at atabus4 drive 0: <WDC WD400BB-22JHC0>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 38166 MB, 77545 cyl, 16 head, 63 sec, 512 bytes/sect x
78165360 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5
(Ultra/100)
wd0(viaide1:0:0): using PIO mode 4, Ultra-DMA mode 5
(Ultra/100) (using DMA)
cd0(viaide1:0:1): using PIO mode 4, Ultra-DMA mode 2
(Ultra/33) (using DMA)
Searching for RAID components...
boot device: <unknown>
root device: help
use one of: ex0 cd0[a-p] wd0[a-p] ddb halt reboot
root device: ex0
dump device: none
file system (default generic): nfs
root on ex0
nfs_boot: trying static
nfs_boot: client_addr=192.168.85.12
nfs_boot: gateway=192.168.85.254
nfs_boot: netmask=192.168.85.0
nfs_boot: server=192.168.85.14
nfs_boot:
root=192.168.85.14:/vol/osrc_data/nfsroot/netbsd-i386-fricka
-cegger
root on
192.168.85.14:/vol/osrc_data/nfsroot/netbsd-i386-fricka-cegg
er
root time: 0x467bbb98
warning: no /dev/console
init path (default /sbin/init):
init: copying out path `/sbin/init' 11
Created mfs /dev (433 blocks, 1266 inodes)
ex0: transmit underrun (9000)  20
Thu Jun 21 12:11:43 UTC 2007
Checking for botched superblock upgrades: done.
Starting file system checks:
mount: /: unknown special file or file system.
Setting tty flags.
Setting sysctl variables:
Starting network.
Hostname: fricka
IPv6 mode: host
Configuring network interfaces:.
add net default: gateway 192.168.85.254
Adding interface aliases:
Building databases: dev, utmp, utmpx done
Starting syslogd.
Checking for core dump...
savecore: can't find device 1039/26852
Jun 21 12:11:46 fricka savecore: can't find device
1039/26852
Mounting all filesystems...
mount: realpath /kern: No such file or directory
Clearing temporary files.
Creating a.out runtime link editor directory cache.
Checking quotas: done.
[...]
Starting inetd.
Starting cron.
ex0: transmit underrun (9000) 20
Thu Jun 21 12:11:48 UTC 2007
NetBSD/i386 (fricka) (console)
login:
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