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Btrfs: Large block related defrag optimizations
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
parent
19c00ddcc3
commit
0f1ebbd159
2 changed files with 23 additions and 4 deletions
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@ -217,11 +217,9 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
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root->fs_info->generation);
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WARN_ON(1);
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}
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if (btrfs_buffer_defrag_done(parent))
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return 0;
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parent_level = btrfs_header_level(parent);
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parent_nritems = btrfs_header_nritems(parent);
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parent_level = btrfs_header_level(parent);
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blocksize = btrfs_level_size(root, parent_level - 1);
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start_slot = 0;
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@ -118,7 +118,6 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
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WARN_ON(*level >= BTRFS_MAX_LEVEL);
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btrfs_clear_buffer_defrag(path->nodes[*level]);
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btrfs_clear_buffer_defrag_done(path->nodes[*level]);
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free_extent_buffer(path->nodes[*level]);
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path->nodes[*level] = NULL;
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@ -148,6 +147,26 @@ static int defrag_walk_up(struct btrfs_trans_handle *trans,
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root->defrag_level = i;
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return 0;
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} else {
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if (*level > 1 && path->nodes[*level] != root->node) {
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struct extent_buffer *next;
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u64 last;
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int ret;
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ret = btrfs_cow_block(trans, root,
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path->nodes[*level],
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path->nodes[*level + 1],
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path->slots[*level + 1],
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&next);
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BUG_ON(ret);
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path->nodes[*level] = next;
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last = next->start;
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ret = btrfs_realloc_node(trans, root, next,
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cache_only, &last);
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BUG_ON(ret);
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if (root == root->fs_info->extent_root)
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btrfs_extent_post_op(trans, root);
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}
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btrfs_clear_buffer_defrag(path->nodes[*level]);
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btrfs_clear_buffer_defrag_done(path->nodes[*level]);
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free_extent_buffer(path->nodes[*level]);
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@ -183,9 +202,11 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
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level = btrfs_header_level(root->node);
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orig_level = level;
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if (level == 0) {
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goto out;
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}
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if (root->defrag_progress.objectid == 0) {
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extent_buffer_get(root->node);
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ret = btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp);
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