Re: [Btrfs-devel] btrfs and git-reflog

> Yes, but the potential problem is actually very different:
>
>  - directory contains 'a', 'b' and 'c'
>
> 	* opendir()
> 	* readdir() returns 'a'
> 	  * unlink('a');
> 	* readdir() returns 'c', having skipped 'b'.
>
> This is something that could in theory happen if a directory is indexed 
> using the *position* of a filename in a directory. 'a' was position 1, 'b' 
> was position 2, and 'c' was position 3. After the first readdir(), the 
> file position was 2 (pointing at 'b'), but when we removed 'a', the other 
> entries positions moved down, and now 'b' is at position 1, and 'c' is at 
> position '2'. When we call readdir() the next time, it skips 'b' (because 
> it already returned position 1!), and returns 'c'.
>
> See?