Commit 0255d491 authored by Mel Gorman's avatar Mel Gorman Committed by Ingo Molnar

mm: Account for a THP NUMA hinting update as one PTE update

A THP PMD update is accounted for as 512 pages updated in vmstat.  This is
large difference when estimating the cost of automatic NUMA balancing and
can be misleading when comparing results that had collapsed versus split
THP. This patch addresses the accounting issue.
Signed-off-by: default avatarMel Gorman <>
Reviewed-by: default avatarRik van Riel <>
Cc: Andrea Arcangeli <>
Cc: Johannes Weiner <>
Cc: Srikar Dronamraju <>
Cc: <>
Signed-off-by: default avatarPeter Zijlstra <>
Link: default avatarIngo Molnar <>
parent 3f926ab9
......@@ -148,7 +148,7 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma,
split_huge_page_pmd(vma, addr, pmd);
else if (change_huge_pmd(vma, pmd, addr, newprot,
prot_numa)) {
pages += HPAGE_PMD_NR;
/* fall through */
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