Re: 4.19: udpgso_bench_tx: setsockopt zerocopy: Unknown error 524

[Willem de Bruijn]

On Tue, Jun 18, 2019 at 7:27 AM Naresh Kamboju
<naresh.kamboju@xxxxxxxxxx> wrote:
>
> selftests: net: udpgso_bench.sh failed on 4.19, 4.14, 4.9 and 4.4 branches.
> PASS on stable branch 5.1, mainline and next.
> This failure is started happening on 4.19 and older kernel branches after
> kselftest upgrade to version 5.1

Does version 5.1 here mean running tests from Linux 5.1, against older kernels?

> Is there any possibilities to backport ?
>
> Error:
> udpgso_bench_tx: setsockopt zerocopy: Unknown error 524

MSG_ZEROCOPY for UDP was added in commit b5947e5d1e71 ("udp:
msg_zerocopy") in Linux 5.0.

The selftest was expanded with this feature in commit db63e489c7aa
("selftests: extend zerocopy tests to udp"), also in Linux 5.0.

Those tests are not expected to pass on older kernels.