diff options
| author | David Sterba <dsterba@suse.com> | 2022-10-26 23:25:14 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2022-12-05 18:00:48 +0100 |
| commit | 428c8e03109e717d90e0d1329dc3d926b9421ad3 (patch) | |
| tree | ff641f6749860e7305e4cf920d9596f1215b2912 /fs/btrfs/block-group.c | |
| parent | 20af93d97f46a824647326278df7d377ba3269ff (diff) | |
btrfs: simplify percent calculation helpers, rename div_factor
The div_factor* helpers calculate fraction or percentage fraction. The
name is a bit confusing, we use it only for percentage calculations and
there are two helpers.
There's a helper mult_frac that's for general fractions, that tries to
be accurate but we multiply and divide by small numbers so we can use
the div_u64 helper.
Rename the div_factor* helpers and use 1..100 percentage range, also drop
the case checking for percentage == 100, it's never hit.
The conversions:
* div_factor calculates tenths and the numbers need to be adjusted
* div_factor_fine is direct replacement
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/block-group.c')
| -rw-r--r-- | fs/btrfs/block-group.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index cfe495d39ebd..ea5fcb665daa 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -1551,7 +1551,7 @@ static bool should_reclaim_block_group(struct btrfs_block_group *bg, u64 bytes_f if (reclaim_thresh == 0) return false; - thresh = div_factor_fine(bg->length, reclaim_thresh); + thresh = mult_perc(bg->length, reclaim_thresh); /* * If we were below the threshold before don't reclaim, we are likely a @@ -3523,13 +3523,13 @@ static int should_alloc_chunk(struct btrfs_fs_info *fs_info, */ if (force == CHUNK_ALLOC_LIMITED) { thresh = btrfs_super_total_bytes(fs_info->super_copy); - thresh = max_t(u64, SZ_64M, div_factor_fine(thresh, 1)); + thresh = max_t(u64, SZ_64M, mult_perc(thresh, 1)); if (sinfo->total_bytes - bytes_used < thresh) return 1; } - if (bytes_used + SZ_2M < div_factor(sinfo->total_bytes, 8)) + if (bytes_used + SZ_2M < mult_perc(sinfo->total_bytes, 80)) return 0; return 1; } |