Re: [Xen-users] xenfs: not registering fielsystem on no-xen platform

[Juergen Gross <jgross@xxxxxxxx>]

On 11/05/16 19:42, jrun wrote:
> On Wed, May 11, 2016 at 06:07:26PM +0200, Juergen Gross wrote:
>> Have a look at http://wiki.xenproject.org/wiki/Compiling_Xen_From_Source
>>
>>
>> Juergen
> 
> i just git pulled xen.git and did
> ./configure --disable-tools --enable-xen
> make dist-xen
> make install-xen
> 
> config was missing under /boot so i did:
> zcat /proc/config.gz > /boot/config-xen
> 
> this is on a machine that's booted with vmliuz-xen and vmliuz-xen has all
> the CONFIG_XEN*'s set to y.
> 
> now grub-mkconfig picks up 20_linux_xen (sorry for long lines).
> #######################################################################
> echo  'Loading Xen xen ...'
> multiboot     /root:intel:com.slackware:amd64/boot/xen.gz placeholder  
> echo  'Loading Linux xen ...'
> module        /root:intel:com.slackware:amd64/boot/vmlinuz-xen placeholder 
> root=/dev/sda ro rootflags=subvol=root:intel:com.slackware:amd64  
> #######################################################################
> 
> picking that menu grub loads the image and then machine restarts
> immediately. any idea?

Not without more data.

Please add the following boot parameters to the hypervisor (the line
in your grub.cfg to load xen.gz):

loglvl=all guest_loglvl=all sync_console noreboot

This will turn on logging on the console and disables a reboot in case
of a crash. You can either add the parameters directly in grub.cfg or
by adding the line

GRUB_CMDLINE_XEN="loglvl=all guest_loglvl=all sync_console noreboot"

to /etc/default/grub and rerun grub-mkconfig.

I hope you will be able to see some messages indicating the reason for
the reboot (which is very likely due to a crash).

In case you have another computer available you might want to setup a
serial console in order to be able to log the console messages on that
other machine. This is a very handy setup for reporting problems. Have a
look at http://wiki.xenproject.org/wiki/Xen_Serial_Console how to do
this.


Juergen

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