[PATCH v4] net/null: Add fast mbuf release TX offload

[Stephen Hemminger]

On Wed, 30 Jul 2025 14:04:51 +0000
Morten Brørup <mb at smartsharesystems.com> wrote:

> Added fast mbuf release, re-using the existing mbuf pool pointer
> in the queue structure.
> 
> Signed-off-by: Morten Brørup <mb at smartsharesystems.com>
> ---
> v4:
> * Force the generic function called by the separate tx_pkt_burst callbacks
>   to be inlined.
> v3:
> * Use separate tx_pkt_burst callbacks depending on per-device TX offload
>   configuration. (Ivan Malov, Konstantin Ananyev)
> * Check TX offload configuration for mutually exclusive MBUF_FAST_FREE and
>   MULTI_SEGS flags. (Ivan Malov, Konstantin Ananyev)
> * Also announce MULTI_SEGS TX offload as a per-queue capability.
> v2:
> * Also announce the MBUF_FAST_FREE TX offload as a per-queue capability.
> * Added missing test of per-device MBUF_FAST_FREE TX offload configuration
>   when configuring the queue.

Queued to next-net for v25.11