struct btrfs_root * root = orig_root->fs_info->extent_root;
struct btrfs_fs_info *info = root->fs_info;
u64 total_needed = num_bytes;
+ u64 *last_ptr = NULL;
struct btrfs_block_group_cache *block_group;
int full_scan = 0;
int wrapped = 0;
+ int empty_cluster = 2 * 1024 * 1024;
WARN_ON(num_bytes < root->sectorsize);
btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY);
+ if (data & BTRFS_BLOCK_GROUP_METADATA) {
+ last_ptr = &root->fs_info->last_alloc;
+ }
+
+ if ((data & BTRFS_BLOCK_GROUP_DATA) && btrfs_test_opt(root, SSD)) {
+ last_ptr = &root->fs_info->last_data_alloc;
+ }
+
+ if (last_ptr) {
+ if (*last_ptr)
+ hint_byte = *last_ptr;
+ else {
+ empty_size += empty_cluster;
+ }
+ }
+
if (search_end == (u64)-1)
search_end = btrfs_super_total_bytes(&info->super_copy);
hint_byte = search_start;
block_group = btrfs_find_block_group(root, block_group,
hint_byte, data, 1);
+ if (last_ptr && *last_ptr == 0 && block_group)
+ hint_byte = block_group->key.objectid;
} else {
block_group = btrfs_find_block_group(root,
trans->block_group,
search_start, data, 1);
}
+ search_start = max(search_start, hint_byte);
total_needed += empty_size;
}
ret = find_search_start(root, &block_group, &search_start,
total_needed, data);
+ if (ret == -ENOSPC && last_ptr && *last_ptr) {
+ *last_ptr = 0;
+ block_group = btrfs_lookup_block_group(info,
+ orig_search_start);
+ search_start = orig_search_start;
+ ret = find_search_start(root, &block_group, &search_start,
+ total_needed, data);
+ }
+ if (ret == -ENOSPC)
+ goto enospc;
if (ret)
goto error;
+ if (last_ptr && *last_ptr && search_start != *last_ptr) {
+ *last_ptr = 0;
+ if (!empty_size) {
+ empty_size += empty_cluster;
+ total_needed += empty_size;
+ }
+ block_group = btrfs_lookup_block_group(info,
+ orig_search_start);
+ search_start = orig_search_start;
+ ret = find_search_start(root, &block_group,
+ &search_start, total_needed, data);
+ if (ret == -ENOSPC)
+ goto enospc;
+ if (ret)
+ goto error;
+ }
+
search_start = stripe_align(root, search_start);
ins->objectid = search_start;
ins->offset = num_bytes;
trans->block_group = block_group;
}
ins->offset = num_bytes;
+ if (last_ptr) {
+ *last_ptr = ins->objectid + ins->offset;
+ if (*last_ptr ==
+ btrfs_super_total_bytes(&root->fs_info->super_copy)) {
+ *last_ptr = 0;
+ }
+ }
return 0;
new_group:
if (root->ref_cows) {
if (data != BTRFS_BLOCK_GROUP_METADATA) {
ret = do_chunk_alloc(trans, root->fs_info->extent_root,
- num_bytes,
+ 2 * 1024 * 1024,
BTRFS_BLOCK_GROUP_METADATA);
BUG_ON(ret);
}
ret = do_chunk_alloc(trans, root->fs_info->extent_root,
- num_bytes, data);
+ num_bytes + 2 * 1024 * 1024, data);
BUG_ON(ret);
}