Re: Automatic balance after mkfs?

[Austin S Hemmelgarn]

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?

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