diff options
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 29 |
1 files changed, 11 insertions, 18 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 08ac5c7fa91..450f5241b5a 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -34,9 +34,8 @@ * anon_vma->lock * mm->page_table_lock * zone->lru_lock (in mark_page_accessed) - * swap_list_lock (in swap_free etc's swap_info_get) + * swap_lock (in swap_duplicate, swap_info_get) * mmlist_lock (in mmput, drain_mmlist and others) - * swap_device_lock (in swap_duplicate, swap_info_get) * mapping->private_lock (in __set_page_dirty_buffers) * inode_lock (in set_page_dirty's __mark_inode_dirty) * sb_lock (within inode_lock in fs/fs-writeback.c) @@ -290,8 +289,6 @@ static int page_referenced_one(struct page *page, pte_t *pte; int referenced = 0; - if (!get_mm_counter(mm, rss)) - goto out; address = vma_address(page, vma); if (address == -EFAULT) goto out; @@ -442,22 +439,19 @@ int page_referenced(struct page *page, int is_locked, int ignore_token) void page_add_anon_rmap(struct page *page, struct vm_area_struct *vma, unsigned long address) { - struct anon_vma *anon_vma = vma->anon_vma; - pgoff_t index; - BUG_ON(PageReserved(page)); - BUG_ON(!anon_vma); inc_mm_counter(vma->vm_mm, anon_rss); - anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON; - index = (address - vma->vm_start) >> PAGE_SHIFT; - index += vma->vm_pgoff; - index >>= PAGE_CACHE_SHIFT - PAGE_SHIFT; - if (atomic_inc_and_test(&page->_mapcount)) { - page->index = index; + struct anon_vma *anon_vma = vma->anon_vma; + + BUG_ON(!anon_vma); + anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON; page->mapping = (struct address_space *) anon_vma; + + page->index = linear_page_index(vma, address); + inc_page_state(nr_mapped); } /* else checking page index and mapping is racy */ @@ -518,8 +512,6 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma) pte_t pteval; int ret = SWAP_AGAIN; - if (!get_mm_counter(mm, rss)) - goto out; address = vma_address(page, vma); if (address == -EFAULT) goto out; @@ -532,6 +524,8 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma) * If the page is mlock()d, we cannot swap it out. * If it's recently referenced (perhaps page_referenced * skipped over this mm) then we should reactivate it. + * + * Pages belonging to VM_RESERVED regions should not happen here. */ if ((vma->vm_flags & (VM_LOCKED|VM_RESERVED)) || ptep_clear_flush_young(vma, address, pte)) { @@ -767,8 +761,7 @@ static int try_to_unmap_file(struct page *page) if (vma->vm_flags & (VM_LOCKED|VM_RESERVED)) continue; cursor = (unsigned long) vma->vm_private_data; - while (get_mm_counter(vma->vm_mm, rss) && - cursor < max_nl_cursor && + while ( cursor < max_nl_cursor && cursor < vma->vm_end - vma->vm_start) { try_to_unmap_cluster(cursor, &mapcount, vma); cursor += CLUSTER_SIZE; |