From: Jakub Kicinski <kubakici@wp.pl>
To: Thomas Graf <tgraf@suug.ch>
Cc: Tom Herbert <tom@herbertland.com>,
"David S. Miller" <davem@davemloft.net>,
Linux Kernel Network Developers <netdev@vger.kernel.org>,
Kernel Team <kernel-team@fb.com>,
Tariq Toukan <tariqt@mellanox.com>,
Brenden Blanco <bblanco@plumgrid.com>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Eric Dumazet <eric.dumazet@gmail.com>,
Jesper Dangaard Brouer <brouer@redhat.com>
Subject: Re: [PATCH RFC 1/3] xdp: Infrastructure to generalize XDP
Date: Wed, 21 Sep 2016 18:26:29 +0100 [thread overview]
Message-ID: <20160921182629.7da23564@jkicinski-Precision-T1700> (raw)
In-Reply-To: <20160921115545.GA12789@pox.localdomain>
On Wed, 21 Sep 2016 13:55:45 +0200, Thomas Graf wrote:
> > I am looking at using this for ILA router. The problem I am hitting is
> > that not all packets that we need to translate go through the XDP
> > path. Some would go through the kernel path, some through XDP path but
>
> When you say kernel path, what do you mean specifically? One aspect of
> XDP I love is that XDP can act as an acceleration option for existing
> BPF programs attached to cls_bpf. Support for direct packet read and
> write at clsact level have made it straight forward to write programs
> which are compatible or at minimum share a lot of common code. They
> can share data structures, lookup functionality, etc.
My very humble dream was that XDP would be transparently offloaded from
cls_bpf if program was simple enough. That ship has most likely sailed
because XDP has different abort behaviour. When possible though, trying
to offload higher-level hooks when the rules don't require access to
full skb would be really cool.
next prev parent reply other threads:[~2016-09-21 17:26 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-20 22:00 [PATCH RFC 0/3] xdp: Generalize XDP Tom Herbert
2016-09-20 22:00 ` [PATCH RFC 1/3] xdp: Infrastructure to generalize XDP Tom Herbert
2016-09-20 22:37 ` Eric Dumazet
2016-09-20 22:40 ` Tom Herbert
2016-09-20 22:44 ` Thomas Graf
2016-09-20 22:49 ` Tom Herbert
2016-09-20 23:09 ` Thomas Graf
2016-09-20 23:18 ` Tom Herbert
2016-09-20 23:43 ` Thomas Graf
2016-09-20 23:59 ` Tom Herbert
2016-09-21 0:13 ` Alexei Starovoitov
2016-09-21 11:55 ` Thomas Graf
2016-09-21 14:19 ` Tom Herbert
2016-09-21 14:48 ` Thomas Graf
2016-09-21 15:08 ` Tom Herbert
2016-09-21 19:56 ` Jesper Dangaard Brouer
2016-09-22 13:14 ` Jesper Dangaard Brouer
2016-09-22 14:46 ` Eric Dumazet
2016-09-21 15:39 ` Alexei Starovoitov
2016-09-21 17:26 ` Jakub Kicinski [this message]
2016-09-20 23:22 ` Daniel Borkmann
2016-09-21 0:01 ` Alexei Starovoitov
2016-09-21 6:39 ` Jesper Dangaard Brouer
2016-09-21 8:42 ` Daniel Borkmann
2016-09-21 15:44 ` Alexei Starovoitov
2016-09-21 17:26 ` Jakub Kicinski
2016-09-21 17:39 ` Tom Herbert
2016-09-21 18:45 ` Jakub Kicinski
2016-09-21 18:50 ` Tom Herbert
2016-09-21 18:54 ` Jakub Kicinski
2016-09-21 18:58 ` Thomas Graf
2016-09-23 11:13 ` Jamal Hadi Salim
2016-09-23 13:00 ` Jesper Dangaard Brouer
2016-09-23 14:26 ` Alexei Starovoitov
2016-09-25 11:32 ` Jamal Hadi Salim
2016-09-23 14:14 ` Tom Herbert
2016-09-25 12:29 ` Jamal Hadi Salim
2016-09-20 22:00 ` [PATCH RFC 2/3] mlx4: Change XDP/BPF to use generic XDP infrastructure Tom Herbert
2016-09-20 22:00 ` [PATCH RFC 3/3] netdevice: Remove obsolete xdp_netdev_command Tom Herbert
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