struct btrfs_fs_info *info = root->fs_info;
int count = 0;
- if (--trans->use_count) {
+ if (trans->use_count > 1) {
+ trans->use_count--;
trans->block_rsv = trans->orig_rsv;
return 0;
}
}
if (lock && cur_trans->blocked && !cur_trans->in_commit) {
- if (throttle) {
- /*
- * We may race with somebody else here so end up having
- * to call end_transaction on ourselves again, so inc
- * our use_count.
- */
- trans->use_count++;
+ if (throttle)
return btrfs_commit_transaction(trans, root);
- } else {
+ else
wake_up_process(info->transaction_kthread);
- }
}
WARN_ON(cur_trans != info->running_transaction);
btrfs_save_ino_cache(root, trans);
+ /* see comments in should_cow_block() */
+ root->force_cow = 0;
+ smp_wmb();
+
if (root->commit_root != root->node) {
mutex_lock(&root->fs_commit_mutex);
switch_commit_root(root);
btrfs_tree_unlock(old);
free_extent_buffer(old);
+ /* see comments in should_cow_block() */
+ root->force_cow = 1;
+ smp_wmb();
+
btrfs_set_root_node(new_root_item, tmp);
/* record when the snapshot was created in key.offset */
key.offset = trans->transid;