From: Jakub Kicinski <kuba@kernel.org>
To: "Alexei Starovoitov" <alexei.starovoitov@gmail.com>
Cc: "Jakub Sitnicki" <jakub@cloudflare.com>,
"Daniel Zahka" <daniel.zahka@gmail.com>, <netdev@vger.kernel.org>,
"Alexei Starovoitov" <ast@kernel.org>,
"Kuniyuki Iwashima" <kuniyu@google.com>,
"Paolo Abeni" <pabeni@redhat.com>,
"Stanislav Fomichev" <sdf@fomichev.me>, <bpf@vger.kernel.org>,
<kernel-team@cloudflare.com>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"John Fastabend" <john.fastabend@gmail.com>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Eduard Zingerman" <eddyz87@gmail.com>,
"Kumar Kartikeya Dwivedi" <memxor@gmail.com>,
"Martin KaFai Lau" <martin.lau@linux.dev>,
"Song Liu" <song@kernel.org>,
"Yonghong Song" <yonghong.song@linux.dev>,
"Jiri Olsa" <jolsa@kernel.org>,
"Emil Tsalapatis" <emil@etsalapatis.com>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Simon Horman" <horms@kernel.org>,
"Jesper Dangaard Brouer" <hawk@kernel.org>,
"Willem de Bruijn" <willemdebruijn.kernel@gmail.com>,
"Florian Westphal" <fw@strlen.de>,
"Jack Wang" <163wangjack@gmail.com>
Subject: Re: [PATCH net-next v2 03/14] bpf: Make BPF skb extension survive packet scrubbing
Date: Fri, 25 Sep 2026 12:18:49 -0700 [thread overview]
Message-ID: <20260925121849.2ac5150b@kernel.org> (raw)
In-Reply-To: <DLNZU9RYL0GW.CHHAJ4R62R9M@gmail.com>
On Fri, 25 Sep 2026 01:07:47 +0000 Alexei Starovoitov wrote:
> > I've implemented Alexei's idea of skb-lifecycle tracepoints that run
> > only when an skb is marked/traced. Currently putting final touches on it
> > before sending it out for the first round of feedback. You can take
> > sneak peek at it on GH [1] to see if it meets your needs.
> >
> > The CPU overhead is lower compared to the skb extension, at least in my
> > local runs, and the kernel changes are simpler, so it seems like a win
> > overall:
> >
> > | | gated skb tps | bpf skb ext |
> > |------------------|------------------|------------------|
> > | **busy** | **+5.44 ± 3.16** | **+8.01 ± 4.75** |
> > | sys | +2.62 ± 2.06 | +3.67 ± 2.76 |
> > | soft | +2.89 ± 1.43 | +3.83 ± 2.10 |
> > | ns/pkt @146k pps | **+≈ 373** | **+≈ 549** |
> >
> > I'll be giving an update on it at LPC [1], if you're attending, and of
> > course will keep you posted here on the ML.
>
> Well, the numbers speak for themselves. I think :)
Instead of improving the existing infra we're adding more BPF-specific
glue and another bit to the skb. Matter of perspective I suppose :/
next prev parent reply other threads:[~2026-09-25 19:18 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-10 14:02 [PATCH net-next v2 00/14] skb extension for BPF metadata Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 01/14] bpf: Introduce per-packet metadata storage for BPF programs Jakub Sitnicki
2026-09-11 10:19 ` Jiayuan Chen
2026-09-10 14:02 ` [PATCH net-next v2 02/14] bpf: Allow access to bpf_sock_ops_kern->skb Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 03/14] bpf: Make BPF skb extension survive packet scrubbing Jakub Sitnicki
2026-09-23 17:46 ` Daniel Zahka
2026-09-24 16:52 ` Jakub Sitnicki
2026-09-25 1:07 ` Alexei Starovoitov
2026-09-25 19:18 ` Jakub Kicinski [this message]
2026-09-25 19:51 ` Alexei Starovoitov
2026-09-25 20:20 ` Jakub Kicinski
2026-09-25 20:27 ` Alexei Starovoitov
2026-09-28 15:52 ` Jakub Sitnicki
2026-09-28 16:14 ` Alexei Starovoitov
2026-09-29 20:32 ` Jakub Sitnicki
2026-09-30 9:00 ` Alexei Starovoitov
2026-10-02 12:37 ` Jakub Sitnicki
2026-09-25 12:03 ` Daniel Zahka
2026-09-25 15:24 ` Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 04/14] selftests/bpf: Add tests for bpf_dynptr_from_skb_ext Jakub Sitnicki
2026-09-11 15:09 ` sashiko-bot
2026-09-10 14:02 ` [PATCH net-next v2 05/14] selftests/bpf: Test skb_ext on cloned skbs Jakub Sitnicki
2026-09-11 15:09 ` sashiko-bot
2026-09-10 14:02 ` [PATCH net-next v2 06/14] selftests/bpf: Test skb_ext survival across veth and GRE Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 07/14] selftests/bpf: Test skb_ext read from cgroup_skb and sk_filter hooks Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 08/14] selftests/bpf: Test skb_ext read from sock_ops and LSM hooks Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 09/14] selftests/bpf: Test skb_ext read from kfree_skb tracepoint Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 10/14] selftests/bpf: Test skb_ext read from netfilter hook Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 11/14] selftests/bpf: Test skb_ext from LWT in, out, and xmit hooks Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 12/14] selftests/bpf: Test skb_ext read from seg6local End.BPF hook Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 13/14] selftests/bpf: Test skb_ext read from sk_skb stream verdict hook Jakub Sitnicki
2026-09-10 14:02 ` [PATCH net-next v2 14/14] selftests/bpf: Use non-trivial test payload in xdp_context tests Jakub Sitnicki
2026-09-10 15:56 ` [PATCH net-next v2 00/14] skb extension for BPF metadata Alexei Starovoitov
2026-09-11 11:33 ` Jakub Sitnicki
2026-09-12 3:32 ` Alexei Starovoitov
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