[dpdk-dev] [PATCH v6] net/memif: zero-copy slave

[Jakub Grajciar -X (jgrajcia - PANTHEON TECH SRO at Cisco)]

> -----Original Message-----
> From: Thomas Monjalon <thomas at monjalon.net>
> Sent: Monday, November 11, 2019 4:25 PM
> To: Jakub Grajciar -X (jgrajcia - PANTHEON TECH SRO at Cisco)
> <jgrajcia at cisco.com>
> Cc: dev at dpdk.org; Ferruh Yigit <ferruh.yigit at intel.com>; David Marchand
> <david.marchand at redhat.com>; Anatoly Burakov
> <anatoly.burakov at intel.com>
> Subject: Re: [dpdk-dev] [PATCH v6] net/memif: zero-copy slave
>
> I didn't get into details of this PMD,
> but requesting an EAL property looks strange to me.
> Is memif using directly some EAL memory?
> Or is it using memory from mempool?
> If it is from mempool, then the property should be requested to mempool.
> Reminder: mempool memory is not always from EAL.

Memif driver exposes memsegs to provide zero-copy. Each memseg list is considered one memory region by the pmd.
See net/memif/rte_eth_memif.c:memif_region_init_zc()