On 2015-06-16 09:13, Holger Hoffstätte wrote:
>
> Forking from the other thread..
>
> On Tue, 16 Jun 2015 12:25:45 +0000, Hugo Mills wrote:
>
>>     Yes. It's an artefact of the way that mkfs works. If you run a
>> balance on those chunks, they'll go away. (btrfs balance start
>> -dusage=0 -musage=0 /mountpoint)
>
> Since I had to explain this very same thing to a new btrfs-using friend
> just yesterday I wondered if it might not make sense for mkfs to issue
> a general balance after creating the fs? It should be simple enough
> (just issue the balance ioctl?) and not have any negative side effects.
>
> Just doing such a post-mkfs cleanup automatically would certainly
> reduce the number of times we have to explain the this. :)
>
> Any reasons why we couldn't/shouldn't do this?
>
Following the same line of thinking, is there any reason we couldn't 
just rewrite mkfs to get rid of this legacy behavior?