Packet processing method and network device

A network device, comprising:

• a network interface controller circuit configured to receive a packet;
• a central processing unit circuit configured to execute a kernel and a network interface controller driver;
• and
• a memory circuit electrically coupled to the central processing unit circuit,
• wherein a portion of storage space of the memory circuit is allocated as a storage pool that comprises a plurality of first storage blocks, and the storage pool is configured to request an increase in a number of the plurality of first storage blocks from the kernel when a number of remaining storage blocks in the plurality of first storage blocks that do not store data is less than a threshold value,
• wherein the network interface controller driver is configured to:
• store the packet in one of the plurality of first storage blocks when a data size of the packet is less than or equal to a predetermined value, and release the one of the plurality of the first storage blocks to the storage pool after the packet is processed;
• and
• request at least one second storage block from the kernel to increase a data capacity of the storage pool to store the packet when the data size of the packet is greater than the predetermined value, and release the at least one second storage block to the kernel after the packet is processed.