The patch titled
Subject: mm/thp: update mm_struct's MM_ANONPAGES stat for huge zero pages
has been added to the -mm tree. Its filename is
mm-thp-update-mm_structs-mm_anonpages-stat-for-huge-zero-pages.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-thp-update-mm_structs-mm_anonpages-stat-for-huge-zero-pages.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-thp-update-mm_structs-mm_anonpages-stat-for-huge-zero-pages.patch
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------------------------------------------------------
From: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Subject: mm/thp: update mm_struct's MM_ANONPAGES stat for huge zero pages
Although the zero huge page is being shared across various processes, each
mapping needs to update its mm_struct's MM_ANONPAGES stat by HPAGE_PMD_NR
to be consistent. This just updates the stats in set_huge_zero_page()
after the mapping gets created and in zap_huge_pmd() when mapping gets
destroyed.
Link: https://lkml.kernel.org/r/1621313300-1118-1-git-send-email-anshuman.khandual@xxxxxxx
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Reviewed-by: Zi Yan<ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 2 ++
1 file changed, 2 insertions(+)
--- a/mm/huge_memory.c~mm-thp-update-mm_structs-mm_anonpages-stat-for-huge-zero-pages
+++ a/mm/huge_memory.c
@@ -715,6 +715,7 @@ static void set_huge_zero_page(pgtable_t
if (pgtable)
pgtable_trans_huge_deposit(mm, pmd, pgtable);
set_pmd_at(mm, haddr, pmd, entry);
+ add_mm_counter(mm, MM_ANONPAGES, HPAGE_PMD_NR);
mm_inc_nr_ptes(mm);
}
@@ -1627,6 +1628,7 @@ int zap_huge_pmd(struct mmu_gather *tlb,
spin_unlock(ptl);
} else if (is_huge_zero_pmd(orig_pmd)) {
zap_deposited_table(tlb->mm, pmd);
+ add_mm_counter(tlb->mm, MM_ANONPAGES, -HPAGE_PMD_NR);
spin_unlock(ptl);
} else {
struct page *page = NULL;
_
Patches currently in -mm which might be from anshuman.khandual@xxxxxxx are
mm-thp-update-mm_structs-mm_anonpages-stat-for-huge-zero-pages.patch
mm-define-default-value-for-first_user_address.patch
