Btrfs: update to the right index of defragment

When we use autodefrag, we forget to update the index which indicates the last page we've dirty. And we'll set dirty flags on a same set of pages again and again. Signed-off-by: Liu Bo <[email protected]> Signed-off-by: Chris Mason <[email protected]>
kishon · Mar 29, 2012 · e1f041e · e1f041e
1 parent 66c2689
commit e1f041e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
@@ -1186,6 +1186,9 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
 			if (newer_off == (u64)-1)
 				break;
 
+			if (ret > 0)
+				i += ret;
+
 			newer_off = max(newer_off + 1,
 					(u64)i << PAGE_CACHE_SHIFT);