zfsonlinux/zfs — comment on commit 12d06bac9b22b11d8a322dfea4bdb50b106c254f
File:  line 0
By behlendorf:

I believe this behavior was modeled after what the lvm2 packages do. Now I'm not a packaging guru (for any distro) so I'm not 100% sure if that's right or wrong but that's the history.