From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
To: Richard Gobert <richardbgobert@gmail.com>,
Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, dsahern@kernel.org, xeb@mail.ru,
shuah@kernel.org, idosch@nvidia.com, amcohen@nvidia.com,
petrm@nvidia.com, jbenc@redhat.com, bpoirier@nvidia.com,
b.galvani@gmail.com, liujian56@huawei.com, horms@kernel.org,
linyunsheng@huawei.com, therbert@google.com,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org
Subject: Re: [PATCH net-next v4 4/4] net: gro: move L3 flush checks to tcp_gro_receive
Date: Tue, 26 Mar 2024 09:40:32 -0400 [thread overview]
Message-ID: <6602d05046526_13d9ab29498@willemb.c.googlers.com.notmuch> (raw)
In-Reply-To: <494e8cac-e87a-4bc4-8a77-1801a703fd86@gmail.com>
Richard Gobert wrote:
> Willem de Bruijn wrote:
> > In v3 we discussed how the flush on network layer differences (like
> > TTL or ToS) currently only affect the TCP GRO path, but should apply
> > more broadly.
> >
> > We agreed that it is fine to leave that to a separate patch series.
> >
> > But seeing this patch, it introduces a lot of churn, but also makes
> > it harder to address that issue for UDP, as it now moves network
> > layer checks directly to the TCP code.
> Currently the logic of flush_id is scattered in tcp_gro_receive and
> {inet,ipv6}_gro_receive with conditionals rewriting ->flush and ->flush_id,
> so IMO the code should be more concise when it's in one place - in addition
> to not doing checks against non relevant packets.
>
> With this patch, the fix will probably be simple, most likely just calling
> gro_network_flush from skb_gro_receive or from the relevant flow in
> udp_gro_receive_segment. Since this bug fix should be simple and it being
> not relevant to the optimization, I'd like to solve it in another series
> and properly test that new flow. Do you agree?
My main concern is moving this code to tcp_offload.c, if it likely
soon will be moved elsewhere again.
next prev parent reply other threads:[~2024-03-26 13:40 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-25 18:25 [PATCH net-next v4 0/4] net: gro: encapsulation bug fix and flush checks improvements Richard Gobert
2024-03-25 18:25 ` [PATCH net-next v4 1/4] net: gro: add p_off param in *_gro_complete Richard Gobert
2024-03-25 18:25 ` [PATCH net-next v4 2/4] selftests/net: add local address bind in vxlan selftest Richard Gobert
2024-03-25 18:25 ` [PATCH net-next v4 3/4] net: gro: add {inner_}network_offset to napi_gro_cb Richard Gobert
2024-03-25 18:25 ` [PATCH net-next v4 4/4] net: gro: move L3 flush checks to tcp_gro_receive Richard Gobert
2024-03-25 18:53 ` Willem de Bruijn
2024-03-26 12:35 ` Richard Gobert
2024-03-26 13:40 ` Willem de Bruijn [this message]
2024-03-26 14:09 ` Richard Gobert
2024-03-26 2:33 ` Jakub Kicinski
2024-03-26 14:14 ` Eric Dumazet
2024-03-26 14:43 ` Richard Gobert
2024-03-26 14:46 ` Eric Dumazet
2024-03-26 15:02 ` Richard Gobert
2024-03-26 15:10 ` Willem de Bruijn
2024-03-26 15:26 ` Richard Gobert
2024-03-26 16:14 ` Paolo Abeni
2024-03-26 17:25 ` Richard Gobert
2024-03-26 18:29 ` Paolo Abeni
2024-03-27 16:07 ` Richard Gobert
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