[PATCH v5 1/3] ethdev: support mulitiple mbuf pools per Rx queue

[Stephen Hemminger]

On Thu, 6 Oct 2022 22:31:24 +0530
Hanumanth Pothula <hpothula at marvell.com> wrote:

> +	/**
> +	 * Points to an array of mempools.
> +	 *
> +	 * Valid only when RTE_ETH_RX_OFFLOAD_MUL_MEMPOOL flag is set in
> +	 * Rx offloads.
> +	 *
> +	 * This provides support for  multiple mbuf pools per Rx queue.
> +	 *
> +	 * This is often useful for saving the memory where the application can
> +	 * create a different pools to steer the specific size of the packet, thus
> +	 * enabling effective use of memory.
> +	 *
> +	 * Note that on Rx scatter enable, a packet may be delivered using a chain
> +	 * of mbufs obtained from single mempool or multiple mempools based on
> +	 * the NIC implementation.
> +	 */
> +	struct rte_mempool **rx_mempools;
> +	uint16_t rx_npool; /** < number of mempools */
> +
>  	uint64_t reserved_64s[2]; /**< Reserved for future fields */
>  	void *reserved_ptrs[2];   /**< Reserved for future fields */

Better and safer to just take up some of those existing reserved fields.