Re: [PATCH v1] selftests/mm: add simple VM_PFNMAP tests based on mmap'ing /dev/mem

On 09.05.25 07:35, Dev Jain wrote:

On 09/05/25 3:50 am, David Hildenbrand wrote:

...

Let's test some basic functionality using /dev/mem. These tests will implicitly cover some PAT (Page Attribute Handling) handling on x86.

These tests will only run when /dev/mem access to the first two pages in physical address space is possible and allowed; otherwise, the tests are skipped.

Hi Dev,

Some generic comments:

1. I think you should also update .gitignore?

I wonder if we could add a checkpatch warning for that, it keeps on happening :)

2. You can use ksft_exit_fail_perror() for wherever you want to print

strerror(errno).

Makes sense, thanks!