#define CHUNK_SIZE (32*1024)
#define MAX_MAP_SIZE (256*1024)
#define IO_BUFFER_SIZE (4092)
-#define MAX_BLOCK_SIZE ((int32)1 << 29)
+#define MAX_BLOCK_SIZE ((int32)1 << 17)
#define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */
#define IOERR_VANISHED (1<<1)