Btrfs: fix btrfs_destroy_marked_extents

So we're forcing the eb's to have their ref count set to 1 so invalidatepage
works but this breaks lots of things, for example root nodes, and is just
plain wrong, we don't need to just evict all of this stuff.  Also drop the
invalidatepage altogether and add a page_cache_release().  With this patch
we no longer hang when trying to access the root nodes after an aborted
transaction and we no longer leak memory.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 19b4db70dcb1e4147aec84bcae2634635bbb6861..5a3bf323e2bd435224ec7ce0ec6a91ada2d343e6 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3524,11 +3524,9 @@ static int btrfs_destroy_marked_extents(struct btrfs_root *root,
                             &(&BTRFS_I(page->mapping->host)->io_tree)->buffer,
                                               offset >> PAGE_CACHE_SHIFT);
                        spin_unlock(&dirty_pages->buffer_lock);
-                       if (eb) {
+                       if (eb)
                                ret = test_and_clear_bit(EXTENT_BUFFER_DIRTY,
                                                         &eb->bflags);
-                               atomic_set(&eb->refs, 1);
-                       }
                        if (PageWriteback(page))
                                end_page_writeback(page);
 
@@ -3542,8 +3540,8 @@ static int btrfs_destroy_marked_extents(struct btrfs_root *root,
                                spin_unlock_irq(&page->mapping->tree_lock);
                        }
 
-                       page->mapping->a_ops->invalidatepage(page, 0);
                        unlock_page(page);
+                       page_cache_release(page);
                }
        }