+ mm-huge_memory-add-the-missing-folio_test_pmd_mappable-for-thp-split-statistics-v2.patch added to mm-unstable branch

+ mm-huge_memory-add-the-missing-folio_test_pmd_mappable-for-thp-split-statistics-v2.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm-huge_memory-add-the-missing-folio_test_pmd_mappable-for-thp-split-statistics-v2
has been added to the -mm mm-unstable branch.  Its filename is
     mm-huge_memory-add-the-missing-folio_test_pmd_mappable-for-thp-split-statistics-v2.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-huge_memory-add-the-missing-folio_test_pmd_mappable-for-thp-split-statistics-v2.patch

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

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------------------------------------------------------
From: Baolin Wang <baolin.wang@linux.alibaba.com>
Subject: mm-huge_memory-add-the-missing-folio_test_pmd_mappable-for-thp-split-statistics-v2
Date: Mon, 22 Apr 2024 15:33:43 +0800

check the THP earlier in case the folio is split, per Lance

Link: https://lkml.kernel.org/r/b99f8cb14bc85fdb6ab43721d1331cb5ebed2581.1713771041.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lance Yang <ioworker0@gmail.com>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/huge_memory.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/mm/huge_memory.c~mm-huge_memory-add-the-missing-folio_test_pmd_mappable-for-thp-split-statistics-v2
+++ a/mm/huge_memory.c
@@ -2934,6 +2934,7 @@ int split_huge_page_to_list_to_order(str
 	XA_STATE_ORDER(xas, &folio->mapping->i_pages, folio->index, new_order);
 	struct anon_vma *anon_vma = NULL;
 	struct address_space *mapping = NULL;
+	bool is_thp = folio_test_pmd_mappable(folio);
 	int extra_pins, ret;
 	pgoff_t end;
 	bool is_hzp;
@@ -3112,7 +3113,7 @@ out_unlock:
 		i_mmap_unlock_read(mapping);
 out:
 	xas_destroy(&xas);
-	if (folio_test_pmd_mappable(folio))
+	if (is_thp)
 		count_vm_event(!ret ? THP_SPLIT_PAGE : THP_SPLIT_PAGE_FAILED);
 	return ret;
 }
_

Patches currently in -mm which might be from baolin.wang@linux.alibaba.com are

mm-page_alloc-fix-freelist-movement-during-block-conversion-fix.patch
mm-page_alloc-consolidate-free-page-accounting-fix-3.patch
mm-record-the-migration-reason-for-struct-migration_target_control.patch
mm-hugetlb-make-the-hugetlb-migration-strategy-consistent.patch
docs-hugetlbpagerst-add-hugetlb-migration-description.patch
mm-factor-out-the-numa-mapping-rebuilding-into-a-new-helper.patch
mm-support-multi-size-thp-numa-balancing.patch
mm-support-multi-size-thp-numa-balancing-v3.patch
mm-huge_memory-add-the-missing-folio_test_pmd_mappable-for-thp-split-statistics.patch
mm-huge_memory-add-the-missing-folio_test_pmd_mappable-for-thp-split-statistics-v2.patch
mm-page_alloc-use-the-correct-thp-order-for-thp-pcp.patch
mm-set-pageblock_order-to-hpage_pmd_order-in-case-with-config_hugetlb_page-but-thp-enabled.patch
mm-page_alloc-allowing-mthp-compaction-to-capture-the-freed-page-directly.patch