From: Stanislav Fomichev <sdf.kernel@gmail.com>
To: netdev-bot+sashiko@kernel.org
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,
saeedm@nvidia.com, tariqt@nvidia.com, mbloch@nvidia.com,
alexanderduyck@fb.com, kernel-team@meta.com, sdf@fomichev.me,
dimitri.daskalakis1@gmail.com, almasrymina@google.com,
dtatulea@nvidia.com, bobbyeshleman@meta.com,
asml.silence@gmail.com, daniel@iogearbox.net,
razor@blackwall.org, leitao@debian.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rdma@vger.kernel.org, linux-kselftest@vger.kernel.org,
leon@kernel.org
Subject: Re: [PATCH net-next v3 1/9] bnxt_en: let the stack segment GSO skbs with too many frags
Date: Mon, 09 Nov 2026 10:29:20 -0800 [thread overview]
Message-ID: <e4def2839d68382fd50e4fe1e6b4f116@gmail.com> (raw)
In-Reply-To: <179418737248.994134.10509157155829463489@kernel.org>
> > +#if (MAX_SKB_FRAGS > TX_MAX_FRAGS)
> > + if (skb_shinfo(skb)->nr_frags > TX_MAX_FRAGS)
> > + features &= ~NETIF_F_GSO_MASK;
> > +#endif
>
> [Severity: Low]
> Should this patch have a Fixes: tag?
>
> Commit b91e82129400 ("bnxt_en: Linearize TX SKB if the fragments exceed
> the max") added the unconditional linearize in bnxt_start_xmit():
[..]
> The commit message describes both problems. Without a Fixes: tag, stable
> kernels that carry b91e82129400 won't pick up this fix.
Will add a Fixes tag, but not sure it's worth the backports..
> [Severity: Low]
> Can the segments that the stack produces here still have more than
> TX_MAX_FRAGS unreadable frags?
[..]
> Could the commit message mention this limitation? Fully closing the gap
> would need a fallback that handles unreadable frags, or a frag limit per
> MSS window at sendmsg time, rather than skb_linearize().
Not sure what's suggested here. The example that's given goes via skb_linearize
and fails cleanly (as expected). Handling this in a better manner is out of
scope?
next prev parent reply other threads:[~2026-11-09 18:29 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-05 22:20 [PATCH net-next v3 0/9] net: devmem: size TX net_iovs from the dmabuf layout Stanislav Fomichev
2026-11-05 22:20 ` [PATCH net-next v3 1/9] bnxt_en: let the stack segment GSO skbs with too many frags Stanislav Fomichev
2026-11-09 1:22 ` netdev-bot+sashiko
2026-11-09 18:29 ` Stanislav Fomichev [this message]
2026-11-05 22:20 ` [PATCH net-next v3 2/9] net: devmem: charge the frag length to TX skb truesize Stanislav Fomichev
2026-11-09 1:22 ` netdev-bot+sashiko
2026-11-09 10:59 ` Breno Leitao
2026-11-05 22:20 ` [PATCH net-next v3 3/9] net: devmem: use niov_shift in net_devmem_get_niov_at() Stanislav Fomichev
2026-11-05 22:20 ` [PATCH net-next v3 4/9] net: devmem: add a per-device netmem TX frag size limit Stanislav Fomichev
2026-11-09 1:22 ` netdev-bot+sashiko
2026-11-09 18:29 ` Stanislav Fomichev
2026-11-05 22:20 ` [PATCH net-next v3 5/9] bnxt_en: set the netmem TX frag size limit to 32KB Stanislav Fomichev
2026-11-09 1:22 ` netdev-bot+sashiko
2026-11-09 18:29 ` Stanislav Fomichev
2026-11-05 22:20 ` [PATCH net-next v3 6/9] eth: fbnic: " Stanislav Fomichev
2026-11-05 22:20 ` [PATCH net-next v3 7/9] net/mlx5e: lift the netmem TX frag size limit Stanislav Fomichev
2026-11-09 1:23 ` netdev-bot+sashiko
2026-11-09 18:29 ` Stanislav Fomichev
2026-11-05 22:20 ` [PATCH net-next v3 8/9] net: devmem: size TX net_iovs from the dmabuf sg table Stanislav Fomichev
2026-11-09 1:23 ` netdev-bot+sashiko
2026-11-09 18:29 ` Stanislav Fomichev
2026-11-05 22:20 ` [PATCH net-next v3 9/9] selftests: drv-net: devmem: TX from a hugepage-backed dmabuf Stanislav Fomichev
2026-11-09 1:23 ` netdev-bot+sashiko
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