mm: add docs for per-order mTHP split counters

This commit introduces documentation for mTHP split counters in
transhuge.rst.

[[email protected]: improve the doc as suggested by Ryan]
  Link: https://lkml.kernel.org/r/[email protected]
[[email protected]: tweak Documentation/admin-guide/mm/transhuge.rst]
  Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Mingzhe Yang <[email protected]>
Signed-off-by: Lance Yang <[email protected]>
Reviewed-by: Barry Song <[email protected]>
Reviewed-by: Ryan Roberts <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Bang Li <[email protected]>
Cc: Baolin Wang <[email protected]>
Cc: Yang Shi <[email protected]>
Cc: Zi Yan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions