hi all,

installed oracle linux 5.1 as DomU guest in Dom0(rhel5, xen 3.0) with storage configured using lvm.

following config file to install guest:

kernel = "/xenImg/oracle51xen/vmlinuz"
ramdisk = "/xenImg/oracle51xen/initrd.img"
memory = 256
name = "oracleos5.1"
vif = [ 'mac=00:16:3e:01:26:33, bridge=xenbr0' ]
disk = [ 'phy:vg01/xenrootvol,xvda,w' ]
extra="askmethod text"

following config file to start guest:
memory = 256
name = "oracleos5.1"
vif = [ 'mac=00:16:3e:01:26:33, bridge=xenbr0' ]
disk = [ 'phy:vg01/xenrootvol,xvda,w' ]
bootloader="/usr/bin/pygrub"

now, when i start guest using second config file, oracle linux has three kernel mentioned:
Enterprise Linux-pae (2.6.18-53.el5PAE)
Enterprise Linux-xen (2.6.18-53.el5xen)
Enterprise Linux-base (2.6.18-53.el5)

only 2(xen) entry work other(1,3), show Error: (22, 'Invalid argument').
Is it mean that only xen kernel can be booted on to a DomU or am i doing something wrong. Am i doing any mistake here or this is limitation of xen.

thanks,
rajnish

This seems now with xen, when we run paravirtualized DomU it has to xen enabled kernel, am i right?

yes, it has to be xen enabled kernel.I don't know doesn't xen enable kernel break some application as its a different kernel.