netdev - Re: [PATCHv3 bpf-next] samples/bpf: add xdp program on egress for xdp_redirect

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Message-ID: <20201208111145.GF277949@localhost.localdomain>
Date:   Tue, 8 Dec 2020 19:11:45 +0800
From:   Hangbin Liu <liuhangbin@...il.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        Daniel Borkmann <daniel@...earbox.net>,
        John Fastabend <john.fastabend@...il.com>,
        Yonghong Song <yhs@...com>,
        Toke Høiland-Jørgensen <toke@...hat.com>
Subject: Re: [PATCHv3 bpf-next] samples/bpf: add xdp program on egress for
 xdp_redirect_map

On Tue, Dec 08, 2020 at 11:39:14AM +0100, Jesper Dangaard Brouer wrote:
> > +	/* If -X supplied, load 2nd xdp prog on egress.
> > +	 * If not, just load dummy prog on egress.
> > +	 */
> 
> The dummy prog need to be loaded, regardless of 2nd xdp prog on egress.

Thanks for this remind, Now I know why the pkts are dropped with I do perf
test on physical NICs.

Regards
Hangbin