diff options
Diffstat (limited to 'fs/btrfs/space-info.c')
| -rw-r--r-- | fs/btrfs/space-info.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c index 5eb161d96e35..f36b16ee0a02 100644 --- a/fs/btrfs/space-info.c +++ b/fs/btrfs/space-info.c @@ -550,6 +550,30 @@ static inline u64 calc_reclaim_items_nr(struct btrfs_fs_info *fs_info, return nr; } +static inline u64 calc_delayed_refs_nr(struct btrfs_fs_info *fs_info, + u64 to_reclaim) +{ + u64 bytes; + u64 nr; + + bytes = btrfs_calc_insert_metadata_size(fs_info, 1); + /* + * We have to check the mount option here because we could be enabling + * the free space tree for the first time and don't have the compat_ro + * option set yet. + * + * We need extra reservations if we have the free space tree because + * we'll have to modify that tree as well. + */ + if (btrfs_test_opt(fs_info, FREE_SPACE_TREE)) + bytes *= 2; + + nr = div64_u64(to_reclaim, bytes); + if (!nr) + nr = 1; + return nr; +} + #define EXTENT_SIZE_PER_ITEM SZ_256K /* @@ -727,7 +751,7 @@ static void flush_space(struct btrfs_fs_info *fs_info, break; } if (state == FLUSH_DELAYED_REFS_NR) - nr = calc_reclaim_items_nr(fs_info, num_bytes); + nr = calc_delayed_refs_nr(fs_info, num_bytes); else nr = 0; btrfs_run_delayed_refs(trans, nr); |