Re: [PATCH v4 2/2] selftests/mm: Smoke test UFFD_FEATURE_WP_UNPOPULATED

[David Hildenbrand]

On 20.03.23 15:43, Peter Xu wrote:
> On Mon, Mar 20, 2023 at 11:25:43AM +0100, David Hildenbrand wrote:
> > On 09.03.23 23:37, Peter Xu wrote:
> > > Enable it by default on the stress test, and add some smoke tests for the
> > > pte markers on anonymous.
> >
> > Would it make sense to make kernel support optional and test both paths --
> > once with the feature enabled (if available on the kernel we're testing) and
> > once with the feature disabled?
>
> Yeah, I think the current uffd selftest is not friendly to old kernels so I
> made it simple - IOW the test should fail already on old kernels AFAIK.
> Maybe I can prepare some patches this week or next to cleanup some parts of
> it.

Some people to tend to run upstream selftests on older kernels, but I 
guess this is not high priority. Can always be added on top.

--
Thanks,

David / dhildenb