tmpfs: move swap swizzling into shmem

[net-next-2.6.git] / mm / shmem.c

diff --git a/mm/shmem.c b/mm/shmem.c
index 7be94342bf06f29cda7392f7214305dd1fb6dc33..e577adf4ae85530a39175cdba516ef8dadcf7327 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -884,7 +884,9 @@ lost2:
 found:
        idx += offset;
        inode = &info->vfs_inode;
-       if (move_from_swap_cache(page, idx, inode->i_mapping) == 0) {
+       if (add_to_page_cache(page, inode->i_mapping, idx, GFP_ATOMIC) == 0) {
+               delete_from_swap_cache(page);
+               set_page_dirty(page);
                info->flags |= SHMEM_PAGEIN;
                shmem_swp_set(info, ptr + offset, 0);
        }
@@ -972,7 +974,8 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
        BUG_ON(!entry);
        BUG_ON(entry->val);
 
-       if (move_to_swap_cache(page, swap) == 0) {
+       if (add_to_swap_cache(page, swap, GFP_ATOMIC) == 0) {
+               remove_from_page_cache(page);
                shmem_swp_set(info, entry, swap.val);
                shmem_swp_unmap(entry);
                spin_unlock(&info->lock);
@@ -982,6 +985,9 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
                        list_move_tail(&info->swaplist, &shmem_swaplist);
                        spin_unlock(&shmem_swaplist_lock);
                }
+               swap_duplicate(swap);
+               page_cache_release(page);       /* pagecache ref */
+               set_page_dirty(page);
                unlock_page(page);
                return 0;
        }
@@ -1217,13 +1223,15 @@ repeat:
                        SetPageUptodate(filepage);
                        set_page_dirty(filepage);
                        swap_free(swap);
-               } else if (!(error = move_from_swap_cache(
-                               swappage, idx, mapping))) {
+               } else if (!(error = add_to_page_cache(
+                               swappage, mapping, idx, GFP_ATOMIC))) {
                        info->flags |= SHMEM_PAGEIN;
                        shmem_swp_set(info, entry, 0);
                        shmem_swp_unmap(entry);
+                       delete_from_swap_cache(swappage);
                        spin_unlock(&info->lock);
                        filepage = swappage;
+                       set_page_dirty(filepage);
                        swap_free(swap);
                } else {
                        shmem_swp_unmap(entry);