diff options
| -rw-r--r-- | include/linux/huge_mm.h | 2 | ||||
| -rw-r--r-- | mm/huge_memory.c | 11 | ||||
| -rw-r--r-- | mm/memory.c | 2 |
3 files changed, 12 insertions, 3 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 6ab47af..b31cb7d 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -11,7 +11,7 @@ extern int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, extern int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, pmd_t *pmd, pmd_t orig_pmd); -extern struct page *follow_trans_huge_pmd(struct mm_struct *mm, +extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, unsigned int flags); diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 08a943b..3a8d6b7 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -971,11 +971,12 @@ out_unlock: return ret; } -struct page *follow_trans_huge_pmd(struct mm_struct *mm, +struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, unsigned int flags) { + struct mm_struct *mm = vma->vm_mm; struct page *page = NULL; assert_spin_locked(&mm->page_table_lock); @@ -998,6 +999,14 @@ struct page *follow_trans_huge_pmd(struct mm_struct *mm, _pmd = pmd_mkyoung(pmd_mkdirty(*pmd)); set_pmd_at(mm, addr & HPAGE_PMD_MASK, pmd, _pmd); } + if ((flags & FOLL_MLOCK) && (vma->vm_flags & VM_LOCKED)) { + if (page->mapping && trylock_page(page)) { + lru_add_drain(); + if (page->mapping) + mlock_vma_page(page); + unlock_page(page); + } + } page += (addr & ~HPAGE_PMD_MASK) >> PAGE_SHIFT; VM_BUG_ON(!PageCompound(page)); if (flags & FOLL_GET) diff --git a/mm/memory.c b/mm/memory.c index 45bb6d2..fb135ba 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1528,7 +1528,7 @@ struct page *follow_page(struct vm_area_struct *vma, unsigned long address, spin_unlock(&mm->page_table_lock); wait_split_huge_page(vma->anon_vma, pmd); } else { - page = follow_trans_huge_pmd(mm, address, + page = follow_trans_huge_pmd(vma, address, pmd, flags); spin_unlock(&mm->page_table_lock); goto out; |
