Re: [dpdk-dev] [PATCH v5 1/4] mempool: add event callbacks

["Kinsella, Ray" <mdr@ashroe.eu>]

On 15/10/2021 17:02, Dmitry Kozlyuk wrote:
> Data path performance can benefit if the PMD knows which memory it will
> need to handle in advance, before the first mbuf is sent to the PMD.
> It is impractical, however, to consider all allocated memory for this
> purpose. Most often mbuf memory comes from mempools that can come and
> go. PMD can enumerate existing mempools on device start, but it also
> needs to track creation and destruction of mempools after the forwarding
> starts but before an mbuf from the new mempool is sent to the device.
> 
> Add an API to register callback for mempool life cycle events:
> * rte_mempool_event_callback_register()
> * rte_mempool_event_callback_unregister()
> Currently tracked events are:
> * RTE_MEMPOOL_EVENT_READY (after populating a mempool)
> * RTE_MEMPOOL_EVENT_DESTROY (before freeing a mempool)
> Provide a unit test for the new API.
> The new API is internal, because it is primarily demanded by PMDs that
> may need to deal with any mempools and do not control their creation,
> while an application, on the other hand, knows which mempools it creates
> and doesn't care about internal mempools PMDs might create.
> 
> Signed-off-by: Dmitry Kozlyuk <dkozlyuk@nvidia.com>
> Acked-by: Matan Azrad <matan@nvidia.com>
> Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
> ---

Acked-by: Ray Kinsella <mdr@ashroe.eu>