Re: Bug in igb driver

Thanks for noting this,  code that is coming has the driver disable LRO
when the stack calls for it, I believe it will solve this problem.

Regards,

Jack


On Tue, Jun 2, 2009 at 9:52 AM, Michael <[e-mail]> wrote:

> Michael wrote:
> > Hello,
> >
> > we encountered problems using igb driver on a Supermicro dual quad-core
> > system (X7DWU).
> > It features an Intel Gigabit dual port controller (82575).
> >
> > The IP forwarding performance was extremely bad (5 kb/s up to 50 kb/s)
> > until we disabled
> > Large Receive Offloading in /etc/sysctl.conf:
> > dev.igb.0.enable_lro=0
> > dev.igb.1.enable_lro=0
> >
> > (changing it using ifconfig -lro and down/up the interfaces didn't help).
> >
> > With the systctl values set as shown above, we get the expected
> > performance ob 50-60 MB/s.
> > We tested this on 7.1-RELEASE, 7.2-RELEASE and 7-STABLE. Right now we're
> > installing
> > 8-CURRENT on the machine to see if it makes a difference.
> >
> > It think it would be worthwhile to list this issue in the 7.2 release
> > errata section (that would've
> > saved us a significant amount of time :).
> >
> > Cheers
> > Michael
> >
> >
> >
> >
> > _______________________________________________
> > [e-mail] mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-bugs
> > To unsubscribe, send any mail to "[e-mail]"
> >
> Turns out that 8/CURRENT of today has the same issues.
> Is this okay as a bug report, or should I file a PR seperately?
>
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