Btrfs: node balance optimizations
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -151,11 +151,6 @@ static int check_node(struct btrfs_root *root, struct btrfs_path *path,
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for (i = 0; nritems > 1 && i < nritems - 2; i++) {
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struct btrfs_key cpukey;
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btrfs_disk_key_to_cpu(&cpukey, &node->ptrs[i + 1].key);
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if (comp_keys(&node->ptrs[i].key, &cpukey) >= 0) {
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struct btrfs_key bad;
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btrfs_disk_key_to_cpu(&bad, &node->ptrs[i].key);
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printk("check_node level %d i is %d bad comp %Lu %u %Lu, %Lu %u %Lu\n",level, i, bad.objectid, bad.flags, bad.offset, cpukey.objectid, cpukey.flags, cpukey.offset);
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}
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BUG_ON(comp_keys(&node->ptrs[i].key, &cpukey) >= 0);
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}
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return 0;
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@ -492,11 +487,16 @@ static int push_nodes_for_insert(struct btrfs_trans_handle *trans,
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/* first, try to make some room in the middle buffer */
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if (left_buf) {
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u32 left_nr;
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btrfs_cow_block(trans, root, left_buf, parent_buf, pslot - 1,
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&left_buf);
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left = btrfs_buffer_node(left_buf);
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left_nr = btrfs_header_nritems(&left->header);
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wret = push_node_left(trans, root, left_buf, mid_buf);
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if (left_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
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wret = 1;
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} else {
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btrfs_cow_block(trans, root, left_buf, parent_buf,
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pslot - 1, &left_buf);
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left = btrfs_buffer_node(left_buf);
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wret = push_node_left(trans, root, left_buf, mid_buf);
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}
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if (wret < 0)
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ret = wret;
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if (wret == 0) {
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@ -528,10 +528,18 @@ static int push_nodes_for_insert(struct btrfs_trans_handle *trans,
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* then try to empty the right most buffer into the middle
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*/
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if (right_buf) {
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btrfs_cow_block(trans, root, right_buf, parent_buf, pslot + 1,
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&right_buf);
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u32 right_nr;
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right = btrfs_buffer_node(right_buf);
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wret = balance_node_right(trans, root, right_buf, mid_buf);
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right_nr = btrfs_header_nritems(&right->header);
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if (right_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
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wret = 1;
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} else {
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btrfs_cow_block(trans, root, right_buf,
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parent_buf, pslot + 1, &right_buf);
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right = btrfs_buffer_node(right_buf);
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wret = balance_node_right(trans, root,
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right_buf, mid_buf);
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}
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if (wret < 0)
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ret = wret;
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if (wret == 0) {
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