[merged mm-stable] mm-alloc_anon_folio-avoid-doing-vma_thp_gfp_mask-in-fallback-cases.patch removed from -mm tree

[merged mm-stable] mm-alloc_anon_folio-avoid-doing-vma_thp_gfp_mask-in-fallback-cases.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: alloc_anon_folio: avoid doing vma_thp_gfp_mask in fallback cases
has been removed from the -mm tree.  Its filename was
     mm-alloc_anon_folio-avoid-doing-vma_thp_gfp_mask-in-fallback-cases.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: Barry Song <v-songbaohua@oppo.com>
Subject: mm: alloc_anon_folio: avoid doing vma_thp_gfp_mask in fallback cases
Date: Fri, 29 Mar 2024 20:37:50 +1300

Fallback rates surpassing 90% have been observed on phones utilizing 64KiB
CONT-PTE mTHP.  In these scenarios, when one out of every 16 PTEs fails to
allocate large folios, the remaining 15 PTEs fallback.  Consequently,
invoking vma_thp_gfp_mask seems redundant in such cases.  Furthermore,
abstaining from its use can also contribute to improved code readability.

Link: https://lkml.kernel.org/r/20240329073750.20012-1-21cnbao@gmail.com
Signed-off-by: Barry Song <v-songbaohua@oppo.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Acked-by: Yu Zhao <yuzhao@google.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Rientjes <rientjes@google.com>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Itaru Kitayama <itaru.kitayama@gmail.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Yin Fengwei <fengwei.yin@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/mm/memory.c~mm-alloc_anon_folio-avoid-doing-vma_thp_gfp_mask-in-fallback-cases
+++ a/mm/memory.c
@@ -4358,6 +4358,9 @@ static struct folio *alloc_anon_folio(st
 
 	pte_unmap(pte);
 
+	if (!orders)
+		goto fallback;
+
 	/* Try allocating the highest of the remaining orders. */
 	gfp = vma_thp_gfp_mask(vma);
 	while (orders) {
_

Patches currently in -mm which might be from v-songbaohua@oppo.com are

mm-add-per-order-mthp-anon_fault_alloc-and-anon_fault_fallback-counters.patch
mm-add-per-order-mthp-anon_swpout-and-anon_swpout_fallback-counters.patch
mm-add-docs-for-per-order-mthp-counters-and-transhuge_page-abi.patch
mm-add-docs-for-per-order-mthp-counters-and-transhuge_page-abi-fix.patch
mm-correct-the-docs-for-thp_fault_alloc-and-thp_fault_fallback.patch