[PATCH V12] mm/debug: Add tests validating architecture page table helpers

[Qian Cai]

> On Jan 28, 2020, at 7:10 AM, Mike Rapoport <rppt at linux.ibm.com> wrote:
> 
> Aren't x86 and arm64 not decent enough?
> Even if this test could be used to detect regressions only on these two
> platforms, the test is valuable.

The question is does it detect regressions good enough? Where is the list of past bugs that it had found?

It is an usual deal for unproven debugging features remain out of tree first and keep gathering unique bugs it found and then justify for a mainline inclusion with enough data.