Re: [PATCH 0/5] btrfs: some fixes around unused block deletion

[Boris Burkov <boris@bur.io>]

On Thu, Jan 25, 2024 at 10:26:23AM +0000, fdmanana@kernel.org wrote:
> From: Filipe Manana <fdmanana@suse.com>
> 
> These fix a couple issues regarding block group deletion, either deleting
> an unused block group when it shouldn't be deleted due to outstanding
> reservations relying on the block group, or unused block groups never
> getting deleted since they were created due to pessimistic space
> reservation and ended up never being used. More details on the change
> logs of each patch.
> 
> Filipe Manana (5):
>   btrfs: add and use helper to check if block group is used
>   btrfs: do not delete unused block group if it may be used soon
>   btrfs: add new unused block groups to the list of unused block groups
>   btrfs: document what the spinlock unused_bgs_lock protects
>   btrfs: add comment about list_is_singular() use at btrfs_delete_unused_bgs()
> 
>  fs/btrfs/block-group.c | 87 +++++++++++++++++++++++++++++++++++++++++-
>  fs/btrfs/block-group.h |  7 ++++
>  fs/btrfs/fs.h          |  3 ++
>  3 files changed, 95 insertions(+), 2 deletions(-)
> 
> -- 
> 2.40.1
> 

Reviewed-by: Boris Burkov <boris@bur.io>