Merge tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:
 "Most of the MM queue. A few things are still pending.

  Liam's maple tree rework didn't make it. This has resulted in a few
  other minor patch series being held over for next time.

  Multi-gen LRU still isn't merged as we were waiting for mapletree to
  stabilize. The current plan is to merge MGLRU into -mm soon and to
  later reintroduce mapletree, with a view to hopefully getting both
  into 6.1-rc1.

  Summary:

   - The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe
     Lin, Yang Shi, Anshuman Khandual and Mike Rapoport

   - Some kmemleak fixes from Patrick Wang and Waiman Long

   - DAMON updates from SeongJae Park

   - memcg debug/visibility work from Roman Gushchin

   - vmalloc speedup from Uladzislau Rezki

   - more folio conversion work from Matthew Wilcox

   - enhancements for coherent device memory mapping from Alex Sierra

   - addition of shared pages tracking and CoW support for fsdax, from
     Shiyang Ruan

   - hugetlb optimizations from Mike Kravetz

   - Mel Gorman has contributed some pagealloc changes to improve
     latency and realtime behaviour.

   - mprotect soft-dirty checking has been improved by Peter Xu

   - Many other singleton patches all over the place"

 [ XFS merge from hell as per Darrick Wong in

   https://lore.kernel.org/all/YshKnxb4VwXycPO8@magnolia/ ]

* tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (282 commits)
  tools/testing/selftests/vm/hmm-tests.c: fix build
  mm: Kconfig: fix typo
  mm: memory-failure: convert to pr_fmt()
  mm: use is_zone_movable_page() helper
  hugetlbfs: fix inaccurate comment in hugetlbfs_statfs()
  hugetlbfs: cleanup some comments in inode.c
  hugetlbfs: remove unneeded header file
  hugetlbfs: remove unneeded hugetlbfs_ops forward declaration
  hugetlbfs: use helper macro SZ_1{K,M}
  mm: cleanup is_highmem()
  mm/hmm: add a test for cross device private faults
  selftests: add soft-dirty into run_vmtests.sh
  selftests: soft-dirty: add test for mprotect
  mm/mprotect: fix soft-dirty check in can_change_pte_writable()
  mm: memcontrol: fix potential oom_lock recursion deadlock
  mm/gup.c: fix formatting in check_and_migrate_movable_page()
  xfs: fail dax mount if reflink is enabled on a partition
  mm/memcontrol.c: remove the redundant updating of stats_flush_threshold
  userfaultfd: don't fail on unrecognized features
  hugetlb_cgroup: fix wrong hugetlb cgroup numa stat
  ...

1 files changed, 25 insertions, 6 deletions

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index bf842b80bde9..be4a77baf784 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1237,6 +1237,13 @@ PAGE_SIZE multiple when read back.
 	the target cgroup. If less bytes are reclaimed than the
 	specified amount, -EAGAIN is returned.
 
+	Please note that the proactive reclaim (triggered by this
+	interface) is not meant to indicate memory pressure on the
+	memory cgroup. Therefore socket memory balancing triggered by
+	the memory reclaim normally is not exercised in this case.
+	This means that the networking layer will not adapt based on
+	reclaim induced by memory.reclaim.
+
   memory.peak
 	A read-only single value file which exists on non-root
 	cgroups.
@@ -1441,6 +1448,24 @@ PAGE_SIZE multiple when read back.
 	  workingset_nodereclaim
 		Number of times a shadow node has been reclaimed
 
+	  pgscan (npn)
+		Amount of scanned pages (in an inactive LRU list)
+
+	  pgsteal (npn)
+		Amount of reclaimed pages
+
+	  pgscan_kswapd (npn)
+		Amount of scanned pages by kswapd (in an inactive LRU list)
+
+	  pgscan_direct (npn)
+		Amount of scanned pages directly  (in an inactive LRU list)
+
+	  pgsteal_kswapd (npn)
+		Amount of reclaimed pages by kswapd
+
+	  pgsteal_direct (npn)
+		Amount of reclaimed pages directly
+
 	  pgfault (npn)
 		Total number of page faults incurred
 
@@ -1450,12 +1475,6 @@ PAGE_SIZE multiple when read back.
 	  pgrefill (npn)
 		Amount of scanned pages (in an active LRU list)
 
-	  pgscan (npn)
-		Amount of scanned pages (in an inactive LRU list)
-
-	  pgsteal (npn)
-		Amount of reclaimed pages
-
 	  pgactivate (npn)
 		Amount of pages moved to the active LRU list