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

[Willem de Bruijn]

On Tue, Jun 18, 2019 at 1:15 PM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Tue, Jun 18, 2019 at 09:47:59AM -0700, David Miller wrote:
> > From: Willem de Bruijn <willemdebruijn.kernel@xxxxxxxxx>
> > Date: Tue, 18 Jun 2019 12:37:33 -0400
> >
> > > Specific to the above test, I can add a check command testing
> > > setsockopt SO_ZEROCOPY  return value. AFAIK kselftest has no explicit
> > > way to denote "skipped", so this would just return "pass". Sounds a
> > > bit fragile, passing success when a feature is absent.
> >
> > Especially since the feature might be absent because the 'config'
> > template forgot to include a necessary Kconfig option.
>
> That is what the "skip" response is for, don't return "pass" if the
> feature just isn't present.  That lets people run tests on systems
> without the config option enabled as you say, or on systems without the
> needed userspace tools present.

I was not aware that kselftest had this feature.

But it appears that exit code KSFT_SKIP (4) will achieve this. Okay,
I'll send a patch and will keep that in mind for future tests.