Unbalanced LACP link

[hiren panchasara]

On 03/17/15 at 12:34P, Adrian Chadd wrote:
> On 17 March 2015 at 11:33, Jason Wolfe <nitroboost at gmail.com> wrote:
> > On Mon, Mar 16, 2015 at 2:43 AM, Hans Petter Selasky <hps at selasky.org> wrote:
> >> On 03/16/15 10:37, Vitalii Duk wrote:
> >>>
> >>> I've changed use_flowid to 0 and it helped! But isn't it setting
> >>> significant? In a description it says "Shift flowid bits to prevent
> >>> multiqueue collisions".
> >>
> >>
> >> Hi,
> >>
> >> Maybe your ethernet hardware is not properly setting the m_flowid ...
> >>
> >> --HPS
> >>
> >
> > Flip use_flowid back to 1 and try setting
> > net.link.lagg.default_flowid_shift / net.link.lagg.X.flowid_shift to 0
> > as Hiren suggested.  r260179 added this shift, which has caused us
> > balancing issues with the i350/igb.
> >
> > https://svnweb.freebsd.org/base?view=revision&revision=260179
> >
> > Based on Adrian's comment about igb/ixgbe not setting the 'full
> > flowid' under normal conditions, does that mean this shift should be 0
> > by default to ensure we don't break balancing for devices that only
> > set the CPU/MSIX queue?
> 
> Or we can just see if there's anything wrong with putting the full 32
> bit RSS flowid in received packets that have them.

It'd be nice to have but for now I am proposing following to fix a known
broken case because of an optimization:
https://reviews.freebsd.org/D2098

Cheers,
Hiren
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