Re: [PATCH v6 5/5] selftests/mm: add UFFDIO_MOVE ioctl test

[David Hildenbrand]

> > Further, the tests are closely related to the given kernel version, they are
> > not some completely separate tests.
>
> Note that there's a general desire for the tests to *run* with older
> kernels and use whatever feature test mechanisms exist to skip tests
> that won't run.  That's often needed anyway for configurable things.

Agreed.

> > (3) avoids dirtying the tree as a "make headers_install" would, but it also
> > means that each test that makes use of new uapi has to update the relevant
> > headers (what people working on QEMU are used to).
>
> Note that you can do an out of tree build to avoid dirtying things.

Yes, but apparently the simple "make headers_install" will dirty the kernel.

See (and ideally comment on)

https://lkml.kernel.org/r/20231209020144.244759-1-jhubbard@xxxxxxxxxx

--
Cheers,

David / dhildenb