Extend documentation (was: Re: Issue getting my first Xen domU up)

[Rodney W. Grimes]

> Adding Benedict who wrote the Xen handbook documentation, and
> hopefully would be able to fix it :).
> 
> On Tue, Feb 05, 2019 at 08:18:05PM +0000, Marcin Cieslak wrote:
> > On Tue, 5 Feb 2019, Eric Bautsch wrote:
> > 
> > > And yes, the qemu-dm-titania.log would have been the place to look. I feel
> > > pretty stupid. It says:
> > 
> > Don't feel stupid. I am using Xen with Dom0 on FreeBSD for months now
> > and I didn't know where the qemu logs go - I was able to figure out
> > the problem by staring at the configuration file for a long time.
> > 
> > Therefore your question was very helpful also for me - thanks!
> 
> It seems there's one piece missing in the handbook which I didn't
> realize, the if_tap module needs to be loaded for QEMU to work.
> 
> I suggest the following is added to the handbook:
> 
> ```
> sysrc -f /boot/loader.conf if_tap_load="YES"
> ```
> 
> And then I've also realized the following line:
> 
> ```
> sysrc -f /boot/loader.conf hw.pci.mcfg=0
> ```
> 
> Is only needed for Xen 4.7, but not for Xen 4.11.
> 
> Finally it might be interesting to add a reference to the location of
> the Xen logs. This should likely be added at the end of the document,
> I think something along the lines of:
> 
> ```
> Xen toolstack related logs can be found at /var/log/xen/ be sure to
> check the contents of that directory if experiencing issues.
> ```

Is there a troubleshooting section in the handbook?
If not there should be, and this would defanitly be mentioned
in that section.  

> 
> Sorry to bother you Benedict, but do you think you could make the
> following changes?
> 
> Thanks, Roger.

-- 
Rod Grimes                                                 rgrimes at freebsd.org