Re: [PATCH net-next 5/5] selftests: net: add veth BQL stress test

[Jesper Dangaard Brouer <hawk@kernel.org>]

On 24/03/2026 18.47, hawk@kernel.org wrote:
> From: Jesper Dangaard Brouer<hawk@kernel.org>
> 
> Add a selftest that exercises veth's BQL (Byte Queue Limits) code path
> under sustained UDP load. The test creates a veth pair with GRO enabled
> (activating the NAPI path and BQL), attaches a qdisc, optionally loads
> iptables rules in the consumer namespace to slow NAPI processing, and
> floods UDP packets for a configurable duration.
> 
[...]
> 
> Signed-off-by: Jesper Dangaard Brouer<hawk@kernel.org>
> Tested-by: Jonas Köppeler<j.koeppeler@tu-berlin.de>
> ---
>   tools/testing/selftests/net/veth_bql_test.sh  | 784 ++++++++++++++++++
>   .../selftests/net/veth_bql_test_virtme.sh     | 124 +++
>   2 files changed, 908 insertions(+)
>   create mode 100755 tools/testing/selftests/net/veth_bql_test.sh
>   create mode 100755 tools/testing/selftests/net/veth_bql_test_virtme.sh
> 
> diff --git a/tools/testing/selftests/net/veth_bql_test.sh b/tools/testing/selftests/net/veth_bql_test.sh
> new file mode 100755
> index 000000000000..9b5923341040
> --- /dev/null
> +++ b/tools/testing/selftests/net/veth_bql_test.sh

The netdev/shellcheck [0][1] had some review comments.
I will work on addressing these.

[0] 
https://netdev-ctrl.bots.linux.dev/logs/build/1071815/14493217/shellcheck/stdout
[1] https://www.shellcheck.net/

pw-bot: changes-requested

--Jesper