On Thu, Jun 10, 2021 at 7:24 PM Andrii Nakryiko
[off-list ref] wrote:

On Wed, Jun 9, 2021 at 6:55 AM Jussi Maki [off-list ref] wrote:

quoted

This patchset introduces XDP support to the bonding driver.

Patch 1 contains the implementation, including support for
the recently introduced EXCLUDE_INGRESS. Patch 2 contains a
performance fix to the roundrobin mode which switches rr_tx_counter
to be per-cpu. Patch 3 contains the test suite for the implementation
using a pair of veth devices.

The vmtest.sh is modified to enable the bonding module and install
modules. The config change should probably be done in the libbpf
repository. Andrii: How would you like this done properly?

I think vmtest.sh and CI setup doesn't support modules (not easily at
least). Can we just compile that driver in? Then you can submit a PR
against libbpf Github repo to adjust the config. We have also kernel
CI repo where we'll need to make this change.

Unfortunately the mode and xmit_policy options of the bonding driver
are module params, so it'll need to be a module so the different modes
can be tested. I already modified vmtest.sh [1] to "make
module_install" into the rootfs and enable the bonding module via
scripts/config, but a cleaner approach would probably be to, as you
suggested, update latest.config in libbpf repo and probably get the
"modules_install" change into vmtest.sh separately (if you're happy
with this approach). What do you think?

[1] https://lore.kernel.org/netdev/20210609135537.1460244-1-joamaki@gmail.com/T/#maaf15ecd6b7c3af764558589118a3c6213e0af81 (local)