Re: [PATCH bpf-next 8/8] selftests/bpf: switch tests to BTF-defined map definitions

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On Fri, Jun 14, 2019 at 4:23 PM Stanislav Fomichev <sdf@xxxxxxxxxxx> wrote:
>
> On 06/10, Andrii Nakryiko wrote:
> > Switch test map definition to new BTF-defined format.
> Reiterating my concerns on non-RFC version:
>
> Pretty please, let's not convert everything at once. Let's start
> with stuff that explicitly depends on BTF (spinlocks?).

How about this approach. I can split last commit into two. One
converting all the stuff that needs BTF (spinlocks, etc). Another part
- everything else. If it's so important for your use case, you'll be
able to just back out my last commit. Or we just don't land last
commit.

>
> One good argument (aside from the one that we'd like to be able to
> run tests internally without BTF for a while): libbpf doesn't
> have any tests as far as I'm aware. If we don't have 'legacy' maps in the
> selftests, libbpf may bit rot.

I left few legacy maps exactly for that reason. See progs/test_btf_*.c.

>
> (Andrii, feel free to ignore, since we've already discussed that)
>
> > Signed-off-by: Andrii Nakryiko <andriin@xxxxxx>
> > ---


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