Re: [PATCH net v2] net/mlx5e: SHAMPO, Fix IP length overflow on large HW GRO sessions
Jakub Kicinski <[email protected]>
| Newsgroups | org.kernel.vger.linux-rdma,org.kernel.vger.linux-kernel,org.kernel.vger.netdev |
|---|---|
| Message-ID | <[email protected]> |
On Mon, 17 Aug 2026 14:16:18 -0400 Tianyu Zuo wrote:
> mlx5e_hw_gro_skb_has_enough_space() bounds a HW GRO session by the
> payload held in the skb fragments only. The L3/L4 headers that
> header-data split placed in the linear area are not accounted for, and
> the limit is inclusive of GRO_LEGACY_MAX_SIZE.
This regresses both ipv4-large-rem and ipv6-large-rem on CX7
# # Exception| STDERR: Expected {64896 600 600 }, Total 3 packets
# # Exception| Received {60840 [!=64896]4656 [!=600]600 }, Total 3 packets.
we could have fit another MSS into the aggregate, easily.
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