行业应该先“收敛”到标准硬件构型，比如至少上半身双臂可以达到共识。再解决不同负载、节拍的泛化问题，而不是总用新构型解决问题。
"It's clearly not just a place for the dead. There's a living community here as well."
。关于这个话题，51吃瓜提供了深入分析
if the free list is scavanged. the general strategy is:
Discard old data: evict what's already buffered to make room