From: Breno Leitao <leitao@debian.org>
To: Stanislav Fomichev <sdf.kernel@gmail.com>
Cc: netdev@vger.kernel.org, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, andrew+netdev@lunn.ch,
edumazet@kernel.org, horms@kernel.org, corbet@lwn.net,
skhan@linuxfoundation.org, rdunlap@infradead.org,
michael.chan@broadcom.com, pavan.chebbi@broadcom.com,
sdf@fomichev.me, almasrymina@google.com, bobbyeshleman@meta.com,
asml.silence@gmail.com, razor@blackwall.org,
daniel@iogearbox.net, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH net-next v2 1/7] bnxt_en: let the stack segment GSO skbs with too many frags
Date: Wed, 4 Nov 2026 08:47:01 -0800 [thread overview]
Message-ID: <authfGAH67c-_ugm@gmail.com> (raw)
In-Reply-To: <20261103235152.1904727-2-sdf@fomichev.me>
On Tue, Nov 03, 2026 at 03:51:46PM -0800, Stanislav Fomichev wrote:
> With MAX_SKB_FRAGS > TX_MAX_FRAGS, the xmit path linearizes skbs with
> more frags than a packet can have BDs. For GSO skbs, linearizing needs a
> large allocation, can produce a head which doesn't fit in a BD with BIG
> TCP, and always fails for unreadable skbs. Clear the GSO features of
> such skbs in ndo_features_check instead, so that the stack segments
> them. Non-GSO skbs are still linearized.
>
> Suggested-by: Eric Dumazet <edumazet@google.com>
> Link: https://lore.kernel.org/all/CANn89i+ps_CozfOyRnKav0_LUmSekJ9ExB5JkDbTAVf_ss_98g@mail.gmail.com/
> Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Reviewed-by: Breno Leitao <leitao@debian.org>
next prev parent reply other threads:[~2026-11-04 16:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-03 23:51 [PATCH net-next v2 0/7] net: devmem: size TX net_iovs from the dmabuf layout Stanislav Fomichev
2026-11-03 23:51 ` [PATCH net-next v2 1/7] bnxt_en: let the stack segment GSO skbs with too many frags Stanislav Fomichev
2026-11-04 16:47 ` Breno Leitao [this message]
2026-11-03 23:51 ` [PATCH net-next v2 2/7] net: devmem: charge the frag length to TX skb truesize Stanislav Fomichev
2026-11-03 23:51 ` [PATCH net-next v2 3/7] net: devmem: use niov_shift in net_devmem_get_niov_at() Stanislav Fomichev
2026-11-03 23:51 ` [PATCH net-next v2 4/7] net: devmem: add a per-device netmem TX frag size limit Stanislav Fomichev
2026-11-04 15:41 ` Mina Almasry
2026-11-03 23:51 ` [PATCH net-next v2 5/7] bnxt_en: limit netmem TX frags to 32KB Stanislav Fomichev
2026-11-03 23:51 ` [PATCH net-next v2 6/7] net: devmem: size TX net_iovs from the dmabuf sg table Stanislav Fomichev
2026-11-03 23:51 ` [PATCH net-next v2 7/7] selftests: drv-net: devmem: TX from a hugepage-backed dmabuf Stanislav Fomichev
2026-11-04 14:43 ` Dragos Tatulea
2026-11-04 0:14 ` [PATCH net-next v2 0/7] net: devmem: size TX net_iovs from the dmabuf layout Mina Almasry
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