K5_IPC_STREAM_SIZE_INCREMENT
new_max_size += K5_IPC_STREAM_SIZE_INCREMENT;
} else if ((in_new_size + K5_IPC_STREAM_SIZE_INCREMENT) < old_max_size) {
while ((in_new_size + K5_IPC_STREAM_SIZE_INCREMENT) < new_max_size &&
(new_max_size > K5_IPC_STREAM_SIZE_INCREMENT)) {
new_max_size -= K5_IPC_STREAM_SIZE_INCREMENT;