Re: [PATCH v2 0/7] btrfs-progs: Support for BG_TREE feature

David Sterba
2019-10-14T15:17:14Z

On Tue, Oct 08, 2019 at 12:49:29PM +0800, Qu Wenruo wrote:
> This patchset can be fetched from github:
> https://github.com/adam900710/btrfs-progs/tree/bg_tree
> Which is based on v5.2.2 tag.
>
> This patchset provides the needed user space infrastructure for BG_TREE
> feature.
>
> Since it's an new incompatible feature, unlike SKINNY_METADATA, btrfs-progs
> is needed to convert existing fs (unmounted) to new format.
>
> Now btrfstune can convert regular extent tree fs to bg tree fs to
> improve mount time.

Have we settled the argument whether to use a new tree or key tricks for
the blocgroup data? I think we have not and will read the previous
discussions. For a feature like this I want to be sure we understand all
the pros and cons.