Hi All,

I have installed Fedora 16.

[root@RSJ boot]# uname -a
Linux RSJ 3.1.0-7.fc16.i686 #1 SMP Tue Nov 1 21:00:16 UTC 2011 i686 i686 i386 GNU/Linux
[root@RSJ boot]#

Then:
1. yum intsall xen

xen got install successfully but it could not update grub entry with xen.

2. [root@RSJ boot]# xl info
libxl: error: libxl.c:56:libxl_ctx_init Is xenstore daemon running?
failed to stat /var/run/xenstored.pid: No such file or directory
cannot init xl context
[root@RSJ boot]#

3. Then i manually updated the grub [entry = /etc/grub.d/20_linux_xen], now grub.conf:
----------------/etc/grub2/grub.conf--------------------------------
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub2-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
load_env
fi
set default="${saved_entry}"
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi

function savedefault {
if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
fi
}

function load_video {
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
}

set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Fedora Linux, with Linux 3.1.0-7.fc16.i686' --class fedora --class gnu-linux --class gnu --class os {
        load_video
        set gfxpayload=keep
        insmod gzio
        insmod part_msdos
        insmod ext2
        set root='(hd0,msdos6)'
        search --no-floppy --fs-uuid --set=root a61dbabc-0d61-41cd-a2c9-3857ae9ee060
        echo    'Loading Linux 3.1.0-7.fc16.i686 ...'
        linux   /vmlinuz-3.1.0-7.fc16.i686 root=/dev/mapper/vg_rsj-lv_root ro rd.md=0 rd.dm=0 rd.lvm.lv=vg_rsj/lv_root KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.luks=0 rd.lvm.lv=vg_rsj/lv_swap LANG=en_US.UTF-8
        echo    'Loading initial ramdisk ...'
        initrd /initramfs-3.1.0-7.fc16.i686.img
}
menuentry 'Fedora Linux, with Linux 3.1.0-7.fc16.i686 (recovery mode)' --class fedora --class gnu-linux --class gnu --class os {
        load_video
        set gfxpayload=keep
        insmod gzio
        insmod part_msdos
        insmod ext2
        set root='(hd0,msdos6)'
        search --no-floppy --fs-uuid --set=root a61dbabc-0d61-41cd-a2c9-3857ae9ee060
        echo    'Loading Linux 3.1.0-7.fc16.i686 ...'
        linux   /vmlinuz-3.1.0-7.fc16.i686 root=/dev/mapper/vg_rsj-lv_root ro single rd.md=0 rd.dm=0 rd.lvm.lv=vg_rsj/lv_root KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.luks=0 rd.lvm.lv=vg_rsj/lv_swap LANG=en_US.UTF-8
        echo    'Loading initial ramdisk ...'
        initrd /initramfs-3.1.0-7.fc16.i686.img
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
menuentry 'Fedora Linux, with Xen 4.1.2 and Linux 3.1.0-7.fc16.i686' --class fedora --class gnu-linux --class gnu --class os {
        load_video
        set gfxpayload=keep
        insmod gzio
        insmod part_msdos
        insmod ext2
        set root='(hd0,msdos6)'
        search --no-floppy --fs-uuid --set=root a61dbabc-0d61-41cd-a2c9-3857ae9ee060
        echo    'Loading Xen 4.1.2 ...'
        multiboot /xen-4.1.2.gz placeholder
        echo    'Loading Linux 3.1.0-7.fc16.i686 ...'
        module /vmlinuz-3.1.0-7.fc16.i686 placeholder root=/dev/mapper/vg_rsj-lv_root ro rd.md=0 rd.dm=0 rd.lvm.lv=vg_rsj/lv_root KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.luks=0 rd.lvm.lv=vg_rsj/lv_swap LANG=en_US.UTF-8
        echo    'Loading initial ramdisk ...'
        module /initramfs-3.1.0-7.fc16.i686.img
}
menuentry 'Fedora Linux, with Linux 3.1.0-7.fc16.i686 (recovery mode)' --class fedora --class gnu-linux --class gnu --class os {
        load_video
        set gfxpayload=keep
        insmod gzio
        insmod part_msdos
        insmod ext2
        set root='(hd0,msdos6)'
        search --no-floppy --fs-uuid --set=root a61dbabc-0d61-41cd-a2c9-3857ae9ee060
        echo    'Loading Linux 3.1.0-7.fc16.i686 ...'
        linux   /vmlinuz-3.1.0-7.fc16.i686 root=/dev/mapper/vg_rsj-lv_root ro single rd.md=0 rd.dm=0 rd.lvm.lv=vg_rsj/lv_root KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.luks=0 rd.lvm.lv=vg_rsj/lv_swap LANG=en_US.UTF-8
        echo    'Loading initial ramdisk ...'
        initrd /initramfs-3.1.0-7.fc16.i686.img
}
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Windows NT/2000/XP (loader) (on /dev/sda1)" --class windows --class os {
        insmod part_msdos
        insmod ntfs
        set root='(hd0,msdos1)'
        search --no-floppy --fs-uuid --set=root 9C78AAFE78AAD5F4
        drivemap -s (hd0) ${root}
        chainloader +1
}
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

### BEGIN /etc/grub.d/90_persistent ###
### END /etc/grub.d/90_persistent ###

--------------------------------------------------------------------------

After reboot and booting with XEN kernel, it show:
elf_xen_note_check: ERROR: Will only load images built for the generic
loader or Linux images
******************************************
Panic on CPU0
Could not set up DOM0 guest OS
*** ***************************************

Is linux kernel 3.1.0-7.fc16.i686 comes with XEN kernel modules compiled ?
What is going wrong, any pointers ?

Regards,
Raj