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| author | Filipe Manana <fdmanana@suse.com> | 2023-06-06 17:26:03 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-06-19 14:59:38 +0300 |
| commit | aadb164bdd5cd7e6c139f2fd5c696ee470cd95d4 (patch) | |
| tree | 518d6b71931a414565361335147fd4c995da5f11 /fs/btrfs | |
| parent | 7e27180994383b7c741ad87749db01e4989a02ba (diff) | |
| download | linux-aadb164bdd5cd7e6c139f2fd5c696ee470cd95d4.tar.xz | |
btrfs: update documentation for a block group's bg_list member
Currently we are only documenting two uses of the bg_list member of a
block group, but there two more:
1) To track deleted block groups for discard purposes, introduced in
commit e33e17ee1098 ("btrfs: add missing discards when unpinning
extents with -o discard");
2) To track block groups for automatic reclaim, introduced more recently
by commit 18bb8bbf13c1 ("btrfs: zoned: automatically reclaim zones")
So document those two other use cases.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/block-group.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/btrfs/block-group.h b/fs/btrfs/block-group.h index cc0e4b37db2d..f204addc3fe8 100644 --- a/fs/btrfs/block-group.h +++ b/fs/btrfs/block-group.h @@ -162,7 +162,14 @@ struct btrfs_block_group { */ struct list_head cluster_list; - /* For delayed block group creation or deletion of empty block groups */ + /* + * Used for several lists: + * + * 1) struct btrfs_fs_info::unused_bgs + * 2) struct btrfs_fs_info::reclaim_bgs + * 3) struct btrfs_transaction::deleted_bgs + * 4) struct btrfs_trans_handle::new_bgs + */ struct list_head bg_list; /* For read-only block groups */ |