diff options
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 372fd224a11d..980d6a3c342c 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -580,6 +580,15 @@ static u64 div_factor(u64 num, int factor) return num; } +static u64 div_factor_fine(u64 num, int factor) +{ + if (factor == 100) + return num; + num *= factor; + do_div(num, 100); + return num; +} + u64 btrfs_find_block_group(struct btrfs_root *root, u64 search_start, u64 search_hint, int owner) { @@ -3218,9 +3227,11 @@ static void force_metadata_allocation(struct btrfs_fs_info *info) rcu_read_unlock(); } -static int should_alloc_chunk(struct btrfs_space_info *sinfo, u64 alloc_bytes) +static int should_alloc_chunk(struct btrfs_root *root, + struct btrfs_space_info *sinfo, u64 alloc_bytes) { u64 num_bytes = sinfo->total_bytes - sinfo->bytes_readonly; + u64 thresh; if (sinfo->bytes_used + sinfo->bytes_reserved + alloc_bytes + 256 * 1024 * 1024 < num_bytes) @@ -3230,8 +3241,10 @@ static int should_alloc_chunk(struct btrfs_space_info *sinfo, u64 alloc_bytes) alloc_bytes < div_factor(num_bytes, 8)) return 0; - if (num_bytes > 256 * 1024 * 1024 && - sinfo->bytes_used < div_factor(num_bytes, 3)) + thresh = btrfs_super_total_bytes(&root->fs_info->super_copy); + thresh = max_t(u64, 256 * 1024 * 1024, div_factor_fine(thresh, 5)); + + if (num_bytes > thresh && sinfo->bytes_used < div_factor(num_bytes, 3)) return 0; return 1; @@ -3265,7 +3278,8 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans, goto out; } - if (!force && !should_alloc_chunk(space_info, alloc_bytes)) { + if (!force && !should_alloc_chunk(extent_root, space_info, + alloc_bytes)) { spin_unlock(&space_info->lock); goto out; } |