+ xarray-honor-xa_flags_account-in-xas_split_alloc.patch added to mm-new branch

The patch titled
     Subject: xarray: honor XA_FLAGS_ACCOUNT in xas_split_alloc()
has been added to the -mm mm-new branch.  Its filename is
     xarray-honor-xa_flags_account-in-xas_split_alloc.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/xarray-honor-xa_flags_account-in-xas_split_alloc.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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------------------------------------------------------
From: Zi Yan <[email protected]>
Subject: xarray: honor XA_FLAGS_ACCOUNT in xas_split_alloc()
Date: Thu, 30 Jul 2026 22:18:01 -0400

XArray operations that allocate xa_nodes, such as xas_nomem() and
xas_alloc(), add __GFP_ACCOUNT when the array has XA_FLAGS_ACCOUNT set. 
This charges the allocated memory and avoids the workingset convergence
issue described by commit 7b785645e8f13 ("mm: fix page cache convergence
regression").

xas_split_alloc() does not have that flag. Add it when necessary.

Link: https://lore.kernel.org/20260730-add-gfp_account-to-xas_split_alloc-v2-2-5a56c2361d85@nvidia.com
Fixes: 6b24ca4a1a8d4 ("mm: Use multi-index entries in the page cache")
Signed-off-by: Zi Yan <[email protected]>
Cc: Baolin Wang <[email protected]>
Cc: Barry Song <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Dev Jain <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Lance Yang <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Cc: Ryan Roberts <[email protected]>
Cc: William Kucharski <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 lib/xarray.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/lib/xarray.c~xarray-honor-xa_flags_account-in-xas_split_alloc
+++ a/lib/xarray.c
@@ -1053,6 +1053,9 @@ void xas_split_alloc(struct xa_state *xa
 	if (xas->xa_shift + XA_CHUNK_SHIFT > order)
 		return;
 
+	if (xas->xa->xa_flags & XA_FLAGS_ACCOUNT)
+		gfp |= __GFP_ACCOUNT;
+
 	do {
 		struct xa_node *node;
 
_

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

mm-percpu-km-clear-page-private-before-free-them.patch
mm-compaction-stop-recording-free-page-order-in-page-private.patch
mm-huge_memory-add-page-private-check-back-in-__split_folio_to_order.patch
mm-page_alloc-make-sure-tail_page-private-is-zero-at-page-free-time.patch
mm-page_alloc-remove-set_page_private-in-prep_compound_tail.patch
mm-huge_memory-use-folios-memcg-inside-__folio_split.patch
xarray-honor-xa_flags_account-in-xas_split_alloc.patch