Re: [PATCH 2/2] selftests/mm: add MADV_COLLAPSE sub-PMD range tests

[Lorenzo Stoakes]

On Fri, May 08, 2026 at 02:23:41PM +0200, David Hildenbrand (Arm) wrote:
> On 5/7/26 09:05, Chen Wandun wrote:
> > Add madv_collapse_range to verify the fix for the spurious -EINVAL
> > returned by madvise_collapse() when the madvised range contains no
> > complete PMD-aligned window.
>
> Do we really need 141 LOC of test to verify a "userspace is being stupid" scenario?
>
> Nothing was really broken, it's just a suboptimal return value, or what am I
> missing?

Agreed, drop this please.

>
> --
> Cheers,
>
> David

Thanks, Lorenzo