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Btrfs: node balance optimizations

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-04-20 13:48:57 -04:00 committed by David Woodhouse
parent e66f709b15
commit 33ade1f826
1 changed files with 19 additions and 11 deletions
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30
fs/btrfs/ctree.c
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@ -151,11 +151,6 @@ static int check_node(struct btrfs_root *root, struct btrfs_path *path,
for (i = 0; nritems > 1 && i < nritems - 2; i++) {
struct btrfs_key cpukey;
btrfs_disk_key_to_cpu(&cpukey, &node->ptrs[i + 1].key);
if (comp_keys(&node->ptrs[i].key, &cpukey) >= 0) {
struct btrfs_key bad;
btrfs_disk_key_to_cpu(&bad, &node->ptrs[i].key);
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);
}
BUG_ON(comp_keys(&node->ptrs[i].key, &cpukey) >= 0);
}
return 0;
@ -492,11 +487,16 @@ static int push_nodes_for_insert(struct btrfs_trans_handle *trans,
/* first, try to make some room in the middle buffer */
if (left_buf) {
u32 left_nr;
btrfs_cow_block(trans, root, left_buf, parent_buf, pslot - 1,
&left_buf);
left = btrfs_buffer_node(left_buf);
left_nr = btrfs_header_nritems(&left->header);
wret = push_node_left(trans, root, left_buf, mid_buf);
if (left_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
wret = 1;
} else {
btrfs_cow_block(trans, root, left_buf, parent_buf,
pslot - 1, &left_buf);
left = btrfs_buffer_node(left_buf);
wret = push_node_left(trans, root, left_buf, mid_buf);
}
if (wret < 0)
ret = wret;
if (wret == 0) {
@ -528,10 +528,18 @@ static int push_nodes_for_insert(struct btrfs_trans_handle *trans,
* then try to empty the right most buffer into the middle
*/
if (right_buf) {
btrfs_cow_block(trans, root, right_buf, parent_buf, pslot + 1,
&right_buf);
u32 right_nr;
right = btrfs_buffer_node(right_buf);
wret = balance_node_right(trans, root, right_buf, mid_buf);
right_nr = btrfs_header_nritems(&right->header);
if (right_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
wret = 1;
} else {
btrfs_cow_block(trans, root, right_buf,
parent_buf, pslot + 1, &right_buf);
right = btrfs_buffer_node(right_buf);
wret = balance_node_right(trans, root,
right_buf, mid_buf);
}
if (wret < 0)
ret = wret;
if (wret == 0) {