Re: [kvm-devel] still seeing network freezes with rtl8139 nic

[david a. <da...@ci...>]

I noted in my original post that if I increase the weight parameter in the
driver to have it pull more packets on each poll before taking it break then it
takes longer to freeze.

I have looked at a newer version of the 8139cp driver. Very few changes to the
poll function; most of them seem to be accommodating changes to the
netdevice/napi api. I'll take a closer look at it today.

david


Avi Kivity wrote:
> Avi Kivity wrote:
>> david ahern wrote:
>>> Almost 7 hours and the uniprocessor case is still chugging along.
>>>
>>>   
>>
>> How long does it usually take to hang?
>>
>> How do I go about reproducing this? apachebench (host) against httpd
>> (guest) doesn't seem to trigger it.
>>
> 
> ab (on host) against httpd (on guest) reproduces within a few minutes.
> 
> uniprocessor guest: works
> smp guest: fails
> smp guest with one offlined cpu: works
> smp guest with httpd pinned to cpu 0: works
> 
> so it's either a guest driver smp problem, or an ioapic problem.
>