selftests: mm: add mTHP collapse test cases

Added a new command 'mthp_khugepaged' for mTHP collapse, along with the
'-c' parameter to specify the collapse order.  Additionally, added mTHP
collapse test cases for 'collapse_full', 'collapse_empty', and
'collapse_single_mthp' for anonymous folios.  All khugepaged test cases
passed.

Link: https://lore.kernel.org/f260058520214a9611922a96326bc54ba282fb73.1785985999.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Tested-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Acked-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Acked-by: Zi Yan <ziy@nvidia.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions