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| author | Nikolay Borisov <nborisov@suse.com> | 2020-03-10 10:00:35 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-03-23 17:01:55 +0100 |
| commit | db161806dc5615a42893a1df7d803d12890699d9 (patch) | |
| tree | fc1e73dc39b5788350afaec5e31a3dc3a185ccc5 /fs/btrfs/space-info.h | |
| parent | btrfs: implement migratepage callback for data pages (diff) | |
| download | linux-db161806dc5615a42893a1df7d803d12890699d9.tar.xz linux-db161806dc5615a42893a1df7d803d12890699d9.zip | |
btrfs: account ticket size at add/delete time
Instead of iterating all pending tickets on the normal/priority list to
sum their total size the cost can be amortized across ticket addition/
removal. This turns O(n) + O(m) (where n is the size of the normal list
and m of the priority list) into O(1). This will mostly have effect in
workloads that experience heavy flushing.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/btrfs/space-info.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/btrfs/space-info.h b/fs/btrfs/space-info.h index 24514cd2c6c1..0a5001ef1481 100644 --- a/fs/btrfs/space-info.h +++ b/fs/btrfs/space-info.h @@ -54,6 +54,13 @@ struct btrfs_space_info { struct list_head ro_bgs; struct list_head priority_tickets; struct list_head tickets; + + /* + * Size of space that needs to be reclaimed in order to satisfy pending + * tickets + */ + u64 reclaim_size; + /* * tickets_id just indicates the next ticket will be handled, so note * it's not stored per ticket. |