From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Song Liu <liu.song.a23@gmail.com>
Cc: Networking <netdev@vger.kernel.org>,
Daniel Borkmann <borkmann@iogearbox.net>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
John Fastabend <john.fastabend@gmail.com>,
makita.toshiaki@lab.ntt.co.jp, brouer@redhat.com
Subject: Re: [bpf-next V1 PATCH 2/8] i40e: implement flush flag for ndo_xdp_xmit
Date: Thu, 31 May 2018 10:47:39 +0200 [thread overview]
Message-ID: <20180531104739.3c3f6e26@redhat.com> (raw)
In-Reply-To: <CAPhsuW6FPfQYdwOgi_w5i6_ym6K3O50cPACR0cXAU6MDDz2Eqg@mail.gmail.com>
On Wed, 30 May 2018 14:58:16 -0700 Song Liu <liu.song.a23@gmail.com> wrote:
> > @@ -3699,6 +3699,9 @@ int i40e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
> > }
> > }
> >
> > + if (unlikely(flags & XDP_XMIT_FLUSH))
> > + i40e_xdp_ring_update_tail(vsi->xdp_rings[queue_index]);
> > +
> > return n - drops;
>
> Do we still flush when drops > 0?
Yes, just as before. Even if all frames are dropped, then it's allowed
to update the tail.
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
next prev parent reply other threads:[~2018-05-31 8:47 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-30 18:00 [bpf-next V1 PATCH 0/8] bpf/xdp: add flags argument to ndo_xdp_xmit and flag flush operation Jesper Dangaard Brouer
2018-05-30 18:00 ` [bpf-next V1 PATCH 1/8] xdp: add flags argument to ndo_xdp_xmit API Jesper Dangaard Brouer
2018-05-30 21:55 ` Song Liu
2018-05-30 18:00 ` [bpf-next V1 PATCH 2/8] i40e: implement flush flag for ndo_xdp_xmit Jesper Dangaard Brouer
2018-05-30 21:58 ` Song Liu
2018-05-31 8:40 ` Jesper Dangaard Brouer
2018-05-31 8:47 ` Jesper Dangaard Brouer [this message]
2018-05-30 18:00 ` [bpf-next V1 PATCH 3/8] ixgbe: " Jesper Dangaard Brouer
2018-05-30 18:00 ` [bpf-next V1 PATCH 4/8] tun: " Jesper Dangaard Brouer
2018-05-30 18:00 ` [bpf-next V1 PATCH 5/8] virtio_net: " Jesper Dangaard Brouer
2018-05-30 18:01 ` [bpf-next V1 PATCH 6/8] xdp: done implementing ndo_xdp_xmit flush flag for all drivers Jesper Dangaard Brouer
2018-05-30 18:01 ` [bpf-next V1 PATCH 7/8] bpf/xdp: non-map redirect can avoid calling ndo_xdp_flush Jesper Dangaard Brouer
2018-05-30 18:01 ` [bpf-next V1 PATCH 8/8] bpf/xdp: devmap " Jesper Dangaard Brouer
2018-05-30 22:06 ` Song Liu
2018-05-31 7:49 ` Jesper Dangaard Brouer
2018-05-30 22:18 ` [bpf-next V1 PATCH 0/8] bpf/xdp: add flags argument to ndo_xdp_xmit and flag flush operation Song Liu
2018-05-31 7:39 ` Jesper Dangaard Brouer
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