From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH] kni: use bulk functions to allocate and free
 mbufs
Date: Wed, 11 Jan 2017 08:17:59 -0800
Message-ID: <20170111081759.7b1ee146@xeon-e3>
References: <1483048216-2936-1-git-send-email-s.vyazmitinov@brain4net.com>
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Cc: olivier.matz@6wind.com, ferruh.yigit@intel.com, dev@dpdk.org
To: Sergey Vyazmitinov <s.vyazmitinov@brain4net.com>
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On Fri, 30 Dec 2016 04:50:16 +0700
Sergey Vyazmitinov <s.vyazmitinov@brain4net.com> wrote:

>  /**
> + * Free n packets mbuf back into its original mempool.
> + *
> + * Free each mbuf, and all its segments in case of chained buffers. Each
> + * segment is added back into its original mempool.
> + *
> + * @param mp
> + *   The packets mempool.
> + * @param mbufs
> + *   The packets mbufs array to be freed.
> + * @param n
> + *   Number of packets.
> + */
> +static inline void rte_pktmbuf_free_bulk(struct rte_mempool *mp,
> +		struct rte_mbuf **mbufs, unsigned n)
> +{
> +	struct rte_mbuf *mbuf, *m_next;
> +	unsigned i;
> +	for (i = 0; i < n; ++i) {
> +		mbuf = mbufs[i];
> +		__rte_mbuf_sanity_check(mbuf, 1);
> +
> +		mbuf = mbuf->next;
> +		while (mbuf != NULL) {
> +			m_next = mbuf->next;
> +			rte_pktmbuf_free_seg(mbuf);
> +			mbuf = m_next;
> +		}
> +	}
> +	rte_mempool_put_bulk(mp, (void * const *)mbufs, n);
> +}

The mbufs may come from different pools. You need to handle that.