Re: [PATCH v7 6/6] selftests/mm: add a GUP selftest

[Mike Rapoport]

> Add a new GUP selftest which uses kselftest_harness.h. Cover
> 12 mapping configurations: THP enabled, THP disabled and
> HugeTLB, each across private/shared mappings and with/without
> FOLL_WRITE. Run 7 test cases for every variant: get_user_pages,
> get_user_pages_fast, pin_user_pages, pin_user_pages_fast,
> pin_user_pages_longterm, and DUMP_USER_PAGES_TEST using both
> get and pin.
> 
> Set up 128 default-sized HugeTLB pages once for the HugeTLB variants
> and derive their mapping size from the default huge-page size.
> 
> Sweep four nr_pages_per_call values for each test: 1, 512, 123 and
> all pages. This preserves the coverage previously provided by
> run_gup_matrix(): 12 mapping combinations x 5 GUP/PUP operations x 4
> batch sizes, for 240 ioctl calls. The two dump modes add another 96
> calls.
> 
> Preserve the previous sparse dump coverage with a standalone test for
> pages 0, 19 and 0x1000. In total the selftest reports 85 TAP
> cases and issues 337 ioctls.
> 
> Add the new gup binary to the selftests/mm build, run_vmtests.sh and
> MAINTAINERS.

There's also ksft_gup_test.sh ;-)
Other than that,

Acked-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>

-- 
Sincerely yours,
Mike.