selftests: drv-net: add BIG TCP coverage to TSO test

Browse source

Add IPv4 and IPv6 test cases that exercise GSO packets under BIG TCP
size limits.

1..2
ok 1 tso.big_tcp_ipv4
ok 2 tso.big_tcp_ipv6

Both of them run the existing tx-tcp-segmentation
and tx-tcp6-segmentation tests at the increased TSO maximum.

Additionally, reserve a hugepage and transmit its content using
MSG_ZEROCOPY to produce skb fragments larger than 65536.
Check that the number of retransmissions represents a small
percentage of the total packets sent. Record the number of drops
before and after the send to catch issues with large frag
handling during segmentation.

Signed-off-by: Narcisa Vasile <narcisav.kernel@gmail.com>
Acked-by: Petr Vorel <pvorel@suse.cz>
Link: https://patch.msgid.link/20260921201145.49875-1-narcisav.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Narcisa Vasile 2026-09-21 13:11:45 -07:00 • committed by Jakub Kicinski

parent dbb8d2dc0d

commit 63182028f3

1 changed files with 161 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

161

tools/testing/selftests/drivers/net/hw/tso.py

View file