[Xen-users] Xen and Asterisk/Zapata WORKING!!

[Jason <fearthepenguin@xxxxxxxxxxxxxxxxx>]

Hey guys, I have been off list for awhile, but thought I would post how 
I got asterisk playing well in a DomU with an X100P FXO card.
The first thing I did was to give up trying to get the zaptel modules to 
compile in a DomU.   I never did get that part working. Instead, you 
compile the module in your Dom0, but tell the make program to use the 
sources for DomU. 

My xen sources are in /usr/src/xen-unstable.hg/,  so the sources for 
linux-xen0 and linux-xenU are in that sub directory.   In order to make 
the least number of modifications to the zaptel make files,  you need to 
setup a link in /lib/modules/2.6.16-xenU/build to 
/usr/src/xen-unstable.hg/linux-2.6.16-xenU  (or whatever kernel version 
you are running)
ls -l /lib/modules/2.6.16-xenU/build
lrwxrwxrwx  1 root root 43 Jul 10 19:50 /lib/modules/2.6.16-xenU/build 
-> /usr/src/xen-unstable.hg/linux-2.6.16-xenU/
Now, download the zaptel sources into whatever directory you want on 
your Dom0.  The next part couldn't be easier.  Just cd into the zaptel 
directory and run
make KVERS=2.6.16-xenU  (or again, whatever kernel version you are using)

The modules get made and we are almost done.   Their is most likely a 
cleaner way to do the next part, but it works for me. Still in Dom0, run 
a make install. This will install the modules into your Dom0, but in 
/lib/modules/2.6.16-xenU/misc directory.  copy that directory over to 
the same place on your DomU and viola, zaptel in DomU.  

Don't forget to export the PCI device to DomU (my X100P shows up as 
02:03.0 Communication controller: Motorola: Unknown device 5608) and be 
very sure that you don't try to load that module into Dom0 for some 
reason. I did that and my IRQ rate shot through the roof when my DomU 
booted and locked the box. 

After that, installing asterisk is straight from the book inside DomU.  
I have had no problems with jitter or timing and cpu usage for my home 
(4 phones, very light use) is almost non existent.

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