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 <redacted>
Link: https://lore.kernel.org/all/CANn89i+ps_CozfOyRnKav0_LUmSekJ9ExB5JkDbTAVf_ss_98g@mail.gmail.com/ (local)
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Reviewed-by: Breno Leitao <leitao@debian.org>