[PATCH] doc: announce mbuf fast free configuration requirements

[Konstantin Ananyev]

> For TX mbuf fast release offload, the mbuf mempool pointer will be added
> to the ethdev tx queue configuration structure, so the ethdev TX burst
> operation doesn't need to fetch it from the first mbuf of each burst being
> fast free'd to the mempool.
> 
> Signed-off-by: Morten Brørup <mb at smartsharesystems.com>
> ---
>  doc/guides/rel_notes/deprecation.rst | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
> index e2d4125308..a7b4505a24 100644
> --- a/doc/guides/rel_notes/deprecation.rst
> +++ b/doc/guides/rel_notes/deprecation.rst
> @@ -152,3 +152,9 @@ Deprecation Notices
>  * bus/vmbus: Starting DPDK 25.11, all the vmbus API defined in
>    ``drivers/bus/vmbus/rte_bus_vmbus.h`` will become internal to DPDK.
>    Those API functions are used internally by DPDK core and netvsc PMD.
> +
> +* ethdev: Configuring a transmit queue for fast mbuf release will
> +  require specifying which mempool to free the mbufs to.
> +  For this, a new field ``struct rte_mempool *mp_fast_free`` will be
> +  added to ``struct rte_eth_txconf``, and must be set when the
> +  ``RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE`` offload flag is set.
> --

Acked-by: Konstantin Ananyev <konstantin.ananyev at huawei.com>
 

> 2.43.0
>