The patch titled
Subject: mm/huge_memory.c.c: use zap_deposited_table() more
has been added to the -mm tree. Its filename is
mm-huge_memory-use-zap_deposited_table-more.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-huge_memory-use-zap_deposited_table-more.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-huge_memory-use-zap_deposited_table-more.patch
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------------------------------------------------------
From: "Oliver O'Halloran" <oohall@xxxxxxxxx>
Subject: mm/huge_memory.c.c: use zap_deposited_table() more
Depending on the flags of the PMD being zapped there may or may not be a
deposited pgtable to be freed. In two of the three cases this is open
coded while the third uses the zap_deposited_table() helper. This patch
converts the others to use the helper to clean things up a bit.
Link: http://lkml.kernel.org/r/20170411174233.21902-2-oohall@xxxxxxxxx
Cc: Reza Arbab <arbab@xxxxxxxxxxxxxxxxxx>
Cc: Balbir Singh <bsingharora@xxxxxxxxx>
Cc: linux-nvdimm@xxxxxxxxxxx
Cc: Oliver O'Halloran <oohall@xxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff -puN mm/huge_memory.c~mm-huge_memory-use-zap_deposited_table-more mm/huge_memory.c
--- a/mm/huge_memory.c~mm-huge_memory-use-zap_deposited_table-more
+++ a/mm/huge_memory.c
@@ -1615,8 +1615,7 @@ int zap_huge_pmd(struct mmu_gather *tlb,
if (is_huge_zero_pmd(orig_pmd))
tlb_remove_page_size(tlb, pmd_page(orig_pmd), HPAGE_PMD_SIZE);
} else if (is_huge_zero_pmd(orig_pmd)) {
- pte_free(tlb->mm, pgtable_trans_huge_withdraw(tlb->mm, pmd));
- atomic_long_dec(&tlb->mm->nr_ptes);
+ zap_deposited_table(tlb->mm, pmd);
spin_unlock(ptl);
tlb_remove_page_size(tlb, pmd_page(orig_pmd), HPAGE_PMD_SIZE);
} else {
@@ -1625,10 +1624,7 @@ int zap_huge_pmd(struct mmu_gather *tlb,
VM_BUG_ON_PAGE(page_mapcount(page) < 0, page);
VM_BUG_ON_PAGE(!PageHead(page), page);
if (PageAnon(page)) {
- pgtable_t pgtable;
- pgtable = pgtable_trans_huge_withdraw(tlb->mm, pmd);
- pte_free(tlb->mm, pgtable);
- atomic_long_dec(&tlb->mm->nr_ptes);
+ zap_deposited_table(tlb->mm, pmd);
add_mm_counter(tlb->mm, MM_ANONPAGES, -HPAGE_PMD_NR);
} else {
if (arch_needs_pgtable_deposit())
_
Patches currently in -mm which might be from oohall@xxxxxxxxx are
mm-huge_memory-use-zap_deposited_table-more.patch
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