btrfs: Print Warning only if ENOSPC_DEBUG is enabled

Ashish Samant · kdave · commit 2e3fcb1ccdbe · 2016-03-14T14:59:54.000+01:00
Dont print warning for ENOSPC error unless ENOSPC_DEBUG is enabled. Use
btrfs_debug if it is enabled.

Signed-off-by: Ashish Samant &lt;ashish.samant@oracle.com&gt;
[ preserve the WARN_ON ]
Signed-off-by: David Sterba &lt;dsterba@suse.com&gt;
diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
@@ -650,9 +650,14 @@ static int btrfs_delayed_inode_reserve_metadata(
 			goto out;
 
 		ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes);
-		if (!WARN_ON(ret))
+		if (!ret)
 			goto out;
 
+		if (btrfs_test_opt(root, ENOSPC_DEBUG)) {
+			btrfs_debug(root->fs_info,
+				    "block rsv migrate returned %d", ret);
+			WARN_ON(1);
+		}
 		/*
 		 * Ok this is a problem, let's just steal from the global rsv
 		 * since this really shouldn't happen that often.
