netdev - Re: [PATCH intel-net 0/5] i40e: ice: ixgbe: ixgbevf: igb: add correct exception tracing for XDP

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Date:   Mon, 10 May 2021 10:57:28 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Magnus Karlsson <magnus.karlsson@...il.com>
Cc:     "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "Karlsson, Magnus" <magnus.karlsson@...el.com>,
        "Fijalkowski, Maciej" <maciej.fijalkowski@...el.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        brouer@...hat.com, Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>
Subject: Re: [PATCH intel-net 0/5] i40e: ice: ixgbe: ixgbevf: igb: add
 correct exception tracing for XDP

On Mon, 10 May 2021 08:06:00 +0200
Magnus Karlsson <magnus.karlsson@...il.com> wrote:

> On Sat, May 8, 2021 at 12:58 AM Nguyen, Anthony L
> <anthony.l.nguyen@...el.com> wrote:
> >
> > On Fri, 2021-04-23 at 12:04 +0200, Magnus Karlsson wrote:  
> > > Add missing exception tracing to XDP when a number of different errors
> > > can occur. The support was only partial. Several errors where not
> > > logged which would confuse the user quite a lot not knowing where and
> > > why the packets disappeared.
> > >
> > > This patch set fixes this for all Intel drivers with XDP support.
> > >
> > > Thanks: Magnus  
> >
> > This doesn't apply anymore with the 5.13 patches. It looks like your
> > "optimize for XDP_REDIRECT in xsk path" patches are conflicting with
> > some of these. Did you want to rework them?  
> 
> I will rebase them and resubmit.

Thanks for working on this Magnus, highly appreciated.  This should
help end-users troubleshoot these kind of 'exception' packet drops.

We have people that will look at updating the sample/bpf/ programs
(that does XDP redirect) to report on these exception errors/drops.

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer