Re: [PATCH bpf-next v2 10/16] selftests/bpf: add bpf_wq tests

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On Tue, Apr 23, 2024 at 7:56 PM Alexei Starovoitov
<alexei.starovoitov@xxxxxxxxx> wrote:
>
> On Sat, Apr 20, 2024 at 2:10 AM Benjamin Tissoires <bentiss@xxxxxxxxxx> wrote:
> >
> > +
> > +SEC("tc")
> > +/* test that workqueues can be used from an array
> > + */
> > +__retval(0)
> > +long test_call_array_sleepable(void *ctx)
> > +{
> > +       int key = 0;
> > +
> > +       return test_elem_callback(&array, &key);
> > +}
> > +
> > +SEC("syscall")
> > +/* Same test than above but from a sleepable context.
> > + */
>
> I adjusted all these comments to be normal single line comments.
>
> The main thing to follow up is to figure out how to wait for wq
> to finish.
> Since we have this message:
> ./test_progs -t wq
> ...
> #521     wq:OK
> Summary: 2/9 PASSED, 0 SKIPPED, 0 FAILED
> Failed to unload bpf_testmod.ko from kernel: -11
>
> and doing manual "rmmod bpf_testmod"
> after the test run is quite annoying.
>
> Overall great stuff. Thank you for pushing it through.
> Much appreciated!

Hi Benjamin,

I've ended up fixing it as well,
because it was causing CI issues.

See
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=82e38a505c9868e784ec31e743fd8a9fa5ca1084





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