[asterisk-users] zaptel huge irq problem

[François Delawarde]

Stephen Bosch wrote:
> François Delawarde wrote:
>   
>> aaah...
>>
>> I'm running asterisk in a Xen kernel, but not on a virtual machine
>> (DomU), only on Dom0, so it's "supposed" to be running on the physical
>> server (no PCI frontend device, ...). I had seen possible problems with
>> older versions of Xen, but only with ztdummy timing and on DomU virtual
>> machines. On Xen mailing list, they all advise to use a digium PCI card
>> to remove those problems.
>>     
>
> You "had seen?" Did you have these problems personally, or are you going
> by mailing list postings?
>   
Sorry for not being Scottish anymore, my English is not what it used to 
be a few hundred years ago. I meant that I'm mainly going by mailing 
list postings.
>   
>> I will test and report what happens with a normal kernel, but meanwhile
>> doesn't anyone know of a possible possibility to make it work with this
>> setting playing for example with IRQ priorities or something, or isn't
>> there any hope at all?
>>     
>
> We abandoned Xen (recent versions too!) after serious interrupt problems
> (it doesn't matter if you are in domU or dom0, by the way) that caused
> the entire *system*, with all the VMs, to lock up *hard* whenever we
> started to push significant amounts of data through anywhere, be it an
> Ethernet controller or a SCSI adapter.
>
> It is in need of a lot of work. Their efforts to commercialize it are
> premature. We had to learn this hard way, unfortunately.
>
> If you need virtualization that badly, you might want to consider going
> with VMware Server, which is now freely available. My experience with
> VMware has been better.
>   
Thanks again for your help, and sorry if I was not 'that' convinced on 
your first answer and sent a mail to Xen user mailing list to check if 
they knew that issue (no answer yet). Now I almost believe you a lot. If 
I understand well I have two options, recode Xen or abandon it. I'll 
probably go for the 2nd choice and start looking at other solutions, KVM 
seems to be a good choice and shouldn't interfere much with Asterisk 
(again: as far as mailing lists say).

François.