From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ferruh Yigit <ferruh.yigit@intel.com>
Subject: Re: [PATCH v8 0/3] new API to free consumed buffers in
 Tx ring
Date: Wed, 19 Apr 2017 17:25:37 +0100
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 <20170324185555.18398-1-bmcfall@redhat.com>
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To: Billy McFall <bmcfall@redhat.com>, thomas.monjalon@6wind.com,
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On 3/24/2017 6:55 PM, Billy McFall wrote:
> See request from 11/21/2016:
>   http://dpdk.org/ml/archives/dev/2016-November/050585.html
> 
> Add a new API to free consumed buffers on TX ring. This addresses two
> scenarios:
> 1) Flooding a packet and want to reuse existing mbuf to avoid a packet
> copy. Increment the reference count of the packet and poll new API until
> reference count is decremented.
> 2) Application runs out of mbufs, or resets and is preparing for
> additional run, call API to free consumed packets so processing can
> continue.
> 
> API will return the number of packets freed (0-n) or error code if
> feature not supported (-ENOTSUP) or input invalid (-ENODEV).
> 
> API for e1000 igb driver and vHost driver have been implemented. Other
> drivers can be implemented over time. Some drivers implement a Tx done
> flush routine that should be reused where possible. e1000 igb driver
> and vHost driver do not have such functions.

Another reminder for PMDs. This is new eth_dev_ops, described above:
"tx_done_cleanup"

Currently only implemented by igb and vhost. Other PMDs feel free to
implement new ops.

Thanks,
ferruh