+ mm-documentation-clarify-where-the-mthp-stats-live.patch added to mm-new branch

The patch titled
     Subject: mm: Documentation: clarify where the mTHP stats live
has been added to the -mm mm-new branch.  Its filename is
     mm-documentation-clarify-where-the-mthp-stats-live.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-documentation-clarify-where-the-mthp-stats-live.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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------------------------------------------------------
From: "Nico Pache (Red Hat)" <[email protected]>
Subject: mm: Documentation: clarify where the mTHP stats live
Date: Tue, 04 Aug 2026 13:25:05 -0600

The note about khugepaged counters references /proc/vmstat for the PMD
case, but never mentions where the mTHPs stats can be found (i.e.:
/sys/kernel/mm/transparent_hugepage/hugepages-<size>kB/stats/) Add a small
addition to this section for clarity.

Also fix a missing period while we are at it.

Link: https://lore.kernel.org/[email protected]
Signed-off-by: Nico Pache (Red Hat) <[email protected]>
Reviewed-by: Baolin Wang <[email protected]>
Suggested-by: Lorenzo Stoakes <[email protected]>
Acked-by: David Hildenbrand (Arm) <[email protected]>
Cc: Barry Song <[email protected]>
Cc: Dev Jain <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Lance Yang <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Ryan Roberts <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Usama Arif <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Zi Yan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 Documentation/admin-guide/mm/transhuge.rst |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/Documentation/admin-guide/mm/transhuge.rst~mm-documentation-clarify-where-the-mthp-stats-live
+++ a/Documentation/admin-guide/mm/transhuge.rst
@@ -224,7 +224,7 @@ khugepaged will be automatically started
 (either of the per-size anon control or the top-level control are set
 to "always" or "madvise"), and it'll be automatically shutdown when
 all THP sizes are disabled (when both the per-size anon control and the
-top-level control are "never")
+top-level control are "never").
 
 process THP controls
 --------------------
@@ -301,7 +301,9 @@ being replaced by a PMD mapping, or (2)
 hugepage of various sizes (PMD-sized or mTHP). Each may happen independently,
 or together, depending on the type of memory and the failures that occur.
 As such, this value should be interpreted roughly as a sign of progress,
-and counters in /proc/vmstat consulted for more accurate accounting)::
+and counters in /proc/vmstat consulted for more accurate accounting.
+Per-order mTHP collapse statistics are also available under
+/sys/kernel/mm/transparent_hugepage/hugepages-<size>kB/stats/)::
 
 	/sys/kernel/mm/transparent_hugepage/khugepaged/pages_collapsed
 
_

Patches currently in -mm which might be from [email protected] are

mm-khugepaged-refactor-per-scan-state-clearing-into-collapse_control_init_scan.patch
mm-khugepaged-extract-young-page-check-into-pte_is_referenced-helper.patch
mm-khugepaged-introduce-a-count_collapse_event-helper.patch
mm-khugepaged-fix-outdated-comments.patch
mm-khugepaged-refactor-the-pte-state-checks-into-a-helper.patch
mm-khugepaged-unmap-pte-before-releasing-vma-write-lock.patch
mm-documentation-clarify-where-the-mthp-stats-live.patch