diff options
Diffstat (limited to 'fs/btrfs/delayed-ref.c')
| -rw-r--r-- | fs/btrfs/delayed-ref.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c index 619d10eff0b4..de8434795913 100644 --- a/fs/btrfs/delayed-ref.c +++ b/fs/btrfs/delayed-ref.c @@ -126,6 +126,41 @@ void btrfs_update_delayed_refs_rsv(struct btrfs_trans_handle *trans) } /* + * Adjust the size of the delayed refs block reserve for 1 block group item + * update. + */ +void btrfs_inc_delayed_refs_rsv_bg_updates(struct btrfs_fs_info *fs_info) +{ + struct btrfs_block_rsv *delayed_rsv = &fs_info->delayed_refs_rsv; + + spin_lock(&delayed_rsv->lock); + /* + * Updating a block group item does not result in new nodes/leaves and + * does not require changing the free space tree, only the extent tree + * or the block group tree, so this is all we need. + */ + delayed_rsv->size += btrfs_calc_metadata_size(fs_info, 1); + delayed_rsv->full = false; + spin_unlock(&delayed_rsv->lock); +} + +/* + * Adjust the size of the delayed refs block reserve to release space for 1 + * block group item update. + */ +void btrfs_dec_delayed_refs_rsv_bg_updates(struct btrfs_fs_info *fs_info) +{ + struct btrfs_block_rsv *delayed_rsv = &fs_info->delayed_refs_rsv; + const u64 num_bytes = btrfs_calc_metadata_size(fs_info, 1); + u64 released; + + released = btrfs_block_rsv_release(fs_info, delayed_rsv, num_bytes, NULL); + if (released > 0) + trace_btrfs_space_reservation(fs_info, "delayed_refs_rsv", + 0, released, 0); +} + +/* * Transfer bytes to our delayed refs rsv. * * @fs_info: the filesystem |