[Xen-users] how to create pv domU use xm

[立新 牛 <nlxswig@xxxxxxxxxxx>]

hi all

      In the past, I always use the hvm domU, now, I want to know how to create the pv domU.

   but I can't understand the configure file of pv which is given by an example int /etc/xen/:

   such as:

=======================================================================================

 #============================================================================

# Python configuration setup for 'xm create'.

# This script sets the parameters used when a domain is created using 'xm create'.

# You use a separate script for each domain you want to create, or

# you can set the parameters for the domain on the xm command line.

#============================================================================

#----------------------------------------------------------------------------

# PV GR UB image file.

kernel = "pv-grub.gz"

# Optional provided menu.lst.

#ramdisk = "/boot/guests/menu.lst"

# Sets path to menu.lst

extra = "(hd0,0)/boot/grub/menu.lst"

# can be a TFTP-served path (DHCP will automatically be run)

# extra = "(nd)/netboot/menu.lst"

# can be configured automatically by GRUB's DHCP option 150 (see grub manual)

# extra = ""

# Initial memory allocation (in megabytes) for the new domain.

#

# WARNING: Creating a domain with insufficient memory may cause out of

#          memory errors. The domain needs enough memory to boot kernel

#          and modules. Allocating less than 32MBs is not recommended.

memory = 128

# A name for your domain. All domains must have different names.

name = "ExampleDomain"

# 128-bit UUID for the domain.  The default behavior is to generate a new UUID

# on each call to 'xm create'.

#uuid = "06ed00fe-1162-4fc4-b5d8-11993ee4a8b9"

# List of which CPUS this domain is allowed to use, default Xen picks

#cpus = ""         # leave to Xen to pick

#cpus = "0"        # all vcpus run on CPU0

#cpus = "0-3,5,^1" # all vcpus run on cpus 0,2,3,5

#cpus = ["2", "3"] # VCPU0 runs on CPU2, VCPU1 runs on CPU3

# Number of Virtual CPUS to use, default is 1

#vcpus = 1

#----------------------------------------------------------------------------

# Define network interfaces.

# By default, no network interfaces are configured.  You may have one created

# with sensible defaults using an empty v if clause:

#

# vif = [ '' ]

#

# or optionally override backend, bridge, ip, mac, script, type, or vifname:

#

# vif = [ 'mac=00:16:3e:00:00:11, bridge=xenbr0' ]

#

# or more than one interface may be configured:

#

# vif = [ '', 'bridge=xenbr1' ]

vif = [ '' ]

#----------------------------------------------------------------------------

# Define the disk devices you want the domain to have access to, and

# what you want them accessible as.

# Each disk entry is of the form phy:UNAME,DEV,MODE

# where UNAME is the device, DEV is the device name the domain will see,

# and MODE is r for read-only, w for read-write.

disk = [ 'phy:hda1,hda1,w' ]

 ...................................................

============== ===================================================================

I can't understand what's the extra = "(hd0,0)/boot/grub/menu.lst" means

whose menu.lst stand for ? dom0 or domU?

if I want to boot from cdrom, what should I do?

on the other side, what modifications should I do on the domU kernel src?

thanks a lot. 

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