igb network lockups

[Jack Vogel]

I've not heard of this problem, but I think most users do not use ALTQ, and
we (Intel) do not
test using it. Can it be eliminated from the equation?

Jack


On Mon, Feb 25, 2013 at 10:16 AM, Christopher D. Harrison <
harrison at biostat.wisc.edu> wrote:

> I recently have been experiencing network "freezes" and network "lockups"
> on our Freebsd 9.1 systems which are running zfs and nfs file servers.
> I upgraded from 9.0 to 9.1 about 2 months ago and we have been having
> issues with almost bi-monthly.   The issue manifests in the system becomes
> unresponsive to any/all nfs clients.   The system is not resource bound as
> our I/O is low to disk and our network is usually in the 20mbit/40mbit
> range.   We do notice a correlation between temporary i/o spikes and
> network freezes but not enough to send our system in to "lockup" mode for
> the next 5min.   Currently we have 4 igb nics in 2 aggr's with 8 queue's
> per nic and our dev.igb reports:
>
> dev.igb.3.%desc: Intel(R) PRO/1000 Network Connection version - 2.3.4
>
> I am almost certain the problem is with the ibg driver as a friend is also
> experiencing the same problem with the same intel igb nic.   He has
> addressed the issue by restarting the network using netif on his systems.
> According to my friend, once the network interfaces get cleared, everything
> comes back and starts working as expected.
>
> I have noticed an issue with the igb driver and I was looking for thoughts
> on how to help address this problem.
> http://freebsd.1045724.n5.**nabble.com/em-igb-if-transmit-**
> drbr-and-ALTQ-td5760338.html<http://freebsd.1045724.n5.nabble.com/em-igb-if-transmit-drbr-and-ALTQ-td5760338.html>
>
> Thoughts/Ideas are greatly appreciated!!!
>
>     -C
>
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