diff options
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 57 |
1 files changed, 22 insertions, 35 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index cc2a99e9cbc8..f904246a8fd5 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3179,7 +3179,6 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long start, unsigned long end, struct page *ref_page) { - int force_flush = 0; struct mm_struct *mm = vma->vm_mm; unsigned long address; pte_t *ptep; @@ -3198,19 +3197,22 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, tlb_start_vma(tlb, vma); mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); address = start; -again: for (; address < end; address += sz) { ptep = huge_pte_offset(mm, address); if (!ptep) continue; ptl = huge_pte_lock(h, mm, ptep); - if (huge_pmd_unshare(mm, &address, ptep)) - goto unlock; + if (huge_pmd_unshare(mm, &address, ptep)) { + spin_unlock(ptl); + continue; + } pte = huge_ptep_get(ptep); - if (huge_pte_none(pte)) - goto unlock; + if (huge_pte_none(pte)) { + spin_unlock(ptl); + continue; + } /* * Migrating hugepage or HWPoisoned hugepage is already @@ -3218,7 +3220,8 @@ again: */ if (unlikely(!pte_present(pte))) { huge_pte_clear(mm, address, ptep); - goto unlock; + spin_unlock(ptl); + continue; } page = pte_page(pte); @@ -3228,9 +3231,10 @@ again: * are about to unmap is the actual page of interest. */ if (ref_page) { - if (page != ref_page) - goto unlock; - + if (page != ref_page) { + spin_unlock(ptl); + continue; + } /* * Mark the VMA as having unmapped its page so that * future faults in this VMA will fail rather than @@ -3246,30 +3250,14 @@ again: hugetlb_count_sub(pages_per_huge_page(h), mm); page_remove_rmap(page, true); - force_flush = !__tlb_remove_page(tlb, page); - if (force_flush) { - address += sz; - spin_unlock(ptl); - break; - } - /* Bail out after unmapping reference page if supplied */ - if (ref_page) { - spin_unlock(ptl); - break; - } -unlock: + spin_unlock(ptl); - } - /* - * mmu_gather ran out of room to batch pages, we break out of - * the PTE lock to avoid doing the potential expensive TLB invalidate - * and page-free while holding it. - */ - if (force_flush) { - force_flush = 0; - tlb_flush_mmu(tlb); - if (address < end && !ref_page) - goto again; + tlb_remove_page_size(tlb, page, huge_page_size(h)); + /* + * Bail out after unmapping reference page if supplied + */ + if (ref_page) + break; } mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); tlb_end_vma(tlb, vma); @@ -3328,7 +3316,7 @@ static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma, address = address & huge_page_mask(h); pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; - mapping = file_inode(vma->vm_file)->i_mapping; + mapping = vma->vm_file->f_mapping; /* * Take the mapping lock for the duration of the table walk. As @@ -4403,7 +4391,6 @@ follow_huge_pud(struct mm_struct *mm, unsigned long address, /* * This function is called from memory failure code. - * Assume the caller holds page lock of the head page. */ int dequeue_hwpoisoned_huge_page(struct page *hpage) { |