The patch titled Subject: mm-shmem-fix-thp-allocation-and-fallback-loop-v3 has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-shmem-fix-thp-allocation-and-fallback-loop-v3.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

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

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------------------------------------------------------ From: Kairui Song kasong@tencent.com Subject: mm-shmem-fix-thp-allocation-and-fallback-loop-v3 Date: Thu, 23 Oct 2025 14:59:13 +0800

introduce a temporary variable to improve code

Link: https://lkml.kernel.org/r/20251023065913.36925-1-ryncsn@gmail.com Link: https://lore.kernel.org/linux-mm/CAMgjq7DqgAmj25nDUwwu1U2cSGSn8n4-Hqpgottedy... [1] Fixes: e7a2ab7b3bb5d ("mm: shmem: add mTHP support for anonymous shmem") Signed-off-by: Kairui Song kasong@tencent.com Cc: Baolin Wang baolin.wang@linux.alibaba.com Cc: Barry Song baohua@kernel.org Cc: David Hildenbrand david@redhat.com Cc: Dev Jain dev.jain@arm.com Cc: Hugh Dickins hughd@google.com Cc: Liam Howlett liam.howlett@oracle.com Cc: Lorenzo Stoakes lorenzo.stoakes@oracle.com Cc: Matthew Wilcox (Oracle) willy@infradead.org Cc: Nico Pache npache@redhat.com Cc: Ryan Roberts ryan.roberts@arm.com Cc: Zi Yan ziy@nvidia.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

mm/shmem.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/mm/shmem.c~mm-shmem-fix-thp-allocation-and-fallback-loop-v3 +++ a/mm/shmem.c @@ -1882,6 +1882,7 @@ static struct folio *shmem_alloc_and_add struct shmem_inode_info *info = SHMEM_I(inode); unsigned long suitable_orders = 0; struct folio *folio = NULL; + pgoff_t aligned_index; long pages; int error, order;

@@ -1895,9 +1896,10 @@ static struct folio *shmem_alloc_and_add order = highest_order(suitable_orders); while (suitable_orders) { pages = 1UL << order; - folio = shmem_alloc_folio(gfp, order, info, round_down(index, pages)); + aligned_index = round_down(index, pages); + folio = shmem_alloc_folio(gfp, order, info, aligned_index); if (folio) { - index = round_down(index, pages); + index = aligned_index; goto allocated; }

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Patches currently in -mm which might be from kasong@tencent.com are

mm-shmem-fix-thp-allocation-and-fallback-loop.patch mm-shmem-fix-thp-allocation-and-fallback-loop-v3.patch mm-swap-do-not-perform-synchronous-discard-during-allocation.patch mm-swap-rename-helper-for-setup-bad-slots.patch mm-swap-cleanup-swap-entry-allocation-parameter.patch mm-migrate-swap-drop-usage-of-folio_index.patch mm-swap-remove-redundant-argument-for-isolating-a-cluster.patch