Re: [PATCH v2 00/17] ZNS Support for Btrfs

[David Sterba <dsterba@suse.cz>]

On Thu, Aug 19, 2021 at 09:19:07PM +0900, Naohiro Aota wrote:
> This series extends zoned support for Zoned Namespace (ZNS) SSDs [1].
> 
> [1] https://zonedstorage.io/introduction/zns/
> 
> This series is available on GitHub at
> v1    https://github.com/naota/linux/tree/btrfs-zns-v1
> HEAD  https://github.com/naota/linux/tree/btrfs-zns
> 
> The ZNS specification introduces extra functionalities listed below.
> 
>   - No conventional zones
>   - Zone Append write command
>   - Zone Capacity
>   - Active Zones
> 
> 
> Naohiro Aota (17):
>   btrfs: zoned: load zone capacity information from devices
>   btrfs: zoned: move btrfs_free_excluded_extents out from
>     btrfs_calc_zone_unusable
>   btrfs: zoned: calculate free space from zone capacity
>   btrfs: zoned: tweak reclaim threshold for zone capacity
>   btrfs: zoned: consider zone as full when no more SB can be written
>   btrfs: zoned: locate superblock position using zone capacity
>   btrfs: zoned: finish superblock zone once no space left for new SB
>   btrfs: zoned: load active zone information from devices
>   btrfs: zoned: introduce physical_map to btrfs_block_group
>   btrfs: zoned: implement active zone tracking
>   btrfs: zoned: load active zone info for block group
>   btrfs: zoned: activate block group on allocation
>   btrfs: zoned: activate new block group
>   btrfs: move ffe_ctl one level up
>   btrfs: zoned: avoid chunk allocation if active block group has enough
>     space
>   btrfs: zoned: finish fully written block group
>   btrfs: zoned: finish relocating block group

This is contained in the zoned mode and I don't see much reason to hold
it back, so it's in misc-next now. I've fixed some minor style issues.
In case there are small fixups worth folding please let me know,
otherwise please send separate patches. Thanks.