diff options
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index b54044c21076..2b44ac11178f 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1380,6 +1380,15 @@ out_unlocked: return ret; } +static inline void zap_deposited_table(struct mm_struct *mm, pmd_t *pmd) +{ + pgtable_t pgtable; + + pgtable = pgtable_trans_huge_withdraw(mm, pmd); + pte_free(mm, pgtable); + atomic_long_dec(&mm->nr_ptes); +} + int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr) { @@ -1421,6 +1430,8 @@ int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, atomic_long_dec(&tlb->mm->nr_ptes); add_mm_counter(tlb->mm, MM_ANONPAGES, -HPAGE_PMD_NR); } else { + if (arch_needs_pgtable_deposit()) + zap_deposited_table(tlb->mm, pmd); add_mm_counter(tlb->mm, MM_FILEPAGES, -HPAGE_PMD_NR); } spin_unlock(ptl); @@ -1607,6 +1618,12 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd, if (!vma_is_anonymous(vma)) { _pmd = pmdp_huge_clear_flush_notify(vma, haddr, pmd); + /* + * We are going to unmap this huge page. So + * just go ahead and zap it + */ + if (arch_needs_pgtable_deposit()) + zap_deposited_table(mm, pmd); if (vma_is_dax(vma)) return; page = pmd_page(_pmd); |