Z:gnu-www-ja-stallman-kth--1e7ab0-Also I think I know how to mak/en

Also I think I know how to make it possible to atomically update any portion of a file. Thus if you want to replace a certain subrange of a file with new data in such a fashion that any attempt to read the file will either see only the old data, or only the new data. I believe I can do that, without any locking even.