diff options
Diffstat (limited to 'fs/btrfs/block-group.h')
| -rw-r--r-- | fs/btrfs/block-group.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/btrfs/block-group.h b/fs/btrfs/block-group.h index 884defd61dcd..a8d2edcd8760 100644 --- a/fs/btrfs/block-group.h +++ b/fs/btrfs/block-group.h @@ -13,6 +13,19 @@ enum btrfs_disk_cache_state { }; /* + * This describes the state of the block_group for async discard. This is due + * to the two pass nature of it where extent discarding is prioritized over + * bitmap discarding. BTRFS_DISCARD_RESET_CURSOR is set when we are resetting + * between lists to prevent contention for discard state variables + * (eg. discard_cursor). + */ +enum btrfs_discard_state { + BTRFS_DISCARD_EXTENTS, + BTRFS_DISCARD_BITMAPS, + BTRFS_DISCARD_RESET_CURSOR, +}; + +/* * Control flags for do_chunk_alloc's force field CHUNK_ALLOC_NO_FORCE means to * only allocate a chunk if we really need one. * @@ -121,6 +134,8 @@ struct btrfs_block_group { struct list_head discard_list; int discard_index; u64 discard_eligible_time; + u64 discard_cursor; + enum btrfs_discard_state discard_state; /* For dirty block groups */ struct list_head dirty_list; |