[merged mm-stable] mm-compaction-stop-recording-free-page-order-in-page-private.patch removed from -mm tree

[merged mm-stable] mm-compaction-stop-recording-free-page-order-in-page-private.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/compaction: stop recording free page order in page->private
has been removed from the -mm tree.  Its filename was
     mm-compaction-stop-recording-free-page-order-in-page-private.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Zi Yan <ziy@nvidia.com>
Subject: mm/compaction: stop recording free page order in page->private
Date: Thu, 09 Jul 2026 14:06:02 -0400

Commit 733aea0b3a7bb ("mm/compaction: add support for >0 order folio
memory compaction.") stores isolated free pages in an array indexed by
free page orders, it is no longer needed to store the order in each page's
->private field.  And there is no code using the stored order.  Stop doing
that.

It also prepares for an upcoming change that ensures subpage->private is
zero at page free time and the removal of set_page_private(0) from
prep_compound_tail().

Link: https://lore.kernel.org/20260709-keep-subpage-private-zero-at-free-v3-2-7e4fe155f5b9@nvidia.com
Signed-off-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Brendan Jackman <brendan.jackman@linux.dev>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/compaction.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/mm/compaction.c~mm-compaction-stop-recording-free-page-order-in-page-private
+++ a/mm/compaction.c
@@ -645,7 +645,6 @@ static unsigned long isolate_freepages_b
 		isolated = __isolate_free_page(page, order);
 		if (!isolated)
 			break;
-		set_page_private(page, order);
 
 		nr_scanned += isolated - 1;
 		total_isolated += isolated;
@@ -1618,7 +1617,6 @@ static void fast_isolate_freepages(struc
 		/* Isolate the page if available */
 		if (page) {
 			if (__isolate_free_page(page, order)) {
-				set_page_private(page, order);
 				nr_isolated = 1 << order;
 				nr_scanned += nr_isolated - 1;
 				total_isolated += nr_isolated;
@@ -1847,7 +1845,6 @@ again:
 		size >>= 1;
 
 		list_add(&freepage[size].lru, &cc->freepages[start_order]);
-		set_page_private(&freepage[size], start_order);
 	}
 	dst = (struct folio *)freepage;
 
_

Patches currently in -mm which might be from ziy@nvidia.com are

mm-huge_memory-use-folios-memcg-inside-__folio_split.patch
xarray-honor-xa_flags_account-in-xas_split_alloc.patch