system locks up with vr driver on alix board

[YongHyeon PYUN]

On Tue, Aug 16, 2011 at 06:39:51PM -0700, Ask Bj??rn Hansen wrote:
> 
> On Aug 16, 2011, at 17:29, YongHyeon PYUN wrote:
> 
> Hi -- thank you for asking.   It's frustrating to have such an obscure and unlikely problem and I apologies for taking your time with it!
> 
> > Could you show me full dmesg and ifconfig output?
> 
> Included below from a happy system.
> 
> I setup some scripts to monitor those things every second and print out diffs on the console and will post again next time it hangs/crashes/whatever is happening with any data.
> 
> > It would also be interesting to know whether vr(4) spewed some logs.
> 
> Where would they have gone?   I didn't see anything in messages (via syslog) or dmesg earlier, for what it's worth.
> 

I thought vr(4) have showed some abnormal messages and it would
have been logged via syslog. Initially I suspected link flips and
TX/RX MAC restart failure triggered by the flips but it seems you
don't see this kind of issue.

> > How many PPS or interrupts do you see from vr interface under high
> > network load?
> 
> Honestly I'm not sure.  I only know how to see the interrupt busy percentage from top …    Is there a cheap way to get those numbers?    If so then I'll log them every second or two and see if it catches anything.
> 

Apart from systat or vmstat, you could get rough PPS with
"netstat -ndI vr0 -w 1"
> 
>   - ask
> 
> gw-b.dev# ifconfig -a

[...]

It seems vlan3 is not configured(i.e. just cloned). Apart from that
all looks normal.