On 08/13/2012 12:57 PM, Konrad Rzeszutek Wilk wrote:
On Sun, Aug 12, 2012 at 10:49:15PM -0500, Jerry Amundson wrote:
On Thu, Jun 28, 2012 at 9:22 AM, Pasi Kärkkäinen<pa...@iki.fi>  wrote:
On Wed, Jun 27, 2012 at 10:40:01PM -0500, Jerry Amundson wrote:
On Sat, Jun 9, 2012 at 6:37 AM, Pasi Kärkkäinen<pa...@iki.fi>  wrote:
On Fri, Jun 08, 2012 at 12:00:44AM -0700, sorabh hamirwasia wrote:
    Hi,
    I have installed "Xen" on Fedora16 host using "yum install xen" command
    and it has been installed properly. I can see the changes in
    /etc/grub2.cfg file too. But when I reboot then the entry for Xen is not
    listed in the boot menu. On further analyzing I found that in
    /etc/grub.conf there is no entry related to Xen. Do we need to modify
    grub.conf manually ? If yes then how to do that. ?
    Please help me with this.
You can tweak the Xen hypervisor cmdline options in:
/etc/default/grub file, like this:

GRUB_DEFAULT="Xen"
The only thing I see in fc17 (also) is a
set default="Xen"
line in /boot/grub2/grub.cfg

I've been waiting, hoping, and did a fresh install of Fedora 17, then
"yum install xen", in anticipation (again) of Fedora/Xen/dom0 boot
magic.
Disappointment.

And did you run "grub2-mkconfig -o /boot/grub2/grub.cfg" ?

What's the problem?
FWIW, my original problem, being that the system in question is i686,
was that kernel-PAE had not been installed before xen-hypervisor.
However, even after that the
set default="Xen"
accomplishes nothing as "Xen" does not exactly match the entries put
Whoops. Did putting 'Xen 4.1.2" do it?

Nope, but
set default="Fedora, with Xen hypervisor"
does work.
At first glance, I didn't see how to fix that, but can look if I get time.

The second problem is that the grub menu entries are built from /boot/xen*, but they should not be, as such a list includes xen-syms* (not bootable), and symlinks which just repeat entries. [thought I brought this up or bz'd this before... hmm.]
I hacked together these changes to 20_linux_xen which worked for me

# diff -u 20_linux_xen*
--- 20_linux_xen        2012-08-13 16:45:17.315983439 -0500
+++ 20_linux_xen~       2012-06-18 15:05:32.000000000 -0500
@@ -23,18 +23,6 @@

 . "/usr/share/grub/grub-mkconfig_lib"

-xen_grub_file_is_not_garbage ()
-{
-  if test -f "$1" -a ! -h "$1"; then
-    case "$1" in
-      *-syms-*) return 1 ;;
-    esac
-  else
-    return 1
-  fi
-  return 0
-}
-
 export TEXTDOMAIN=grub
 export TEXTDOMAINDIR="${datarootdir}/locale"

@@ -168,10 +156,7 @@
 if [ "x${linux_list}" = "x" ] ; then
     exit 0
 fi
-xen_try=`for f in /boot/xen*; do
-        if xen_grub_file_is_not_garbage "$f" ; then echo -n "$f " ; fi
-      done`
-xen_list=`for i in $xen_try; do
+xen_list=`for i in /boot/xen*; do
         if grub_file_is_not_garbage "$i" ; then echo -n "$i " ; fi
       done`
 prepare_boot_cache=

--
jerry

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