Re: [PATCH / RFC ] ethdev: Allow rte_eth_dev_configure with zero RX/TX queues

[Thomas Monjalon <thomas.monjalon@6wind.com>]

2016-05-16 11:33, Simon Kagstrom:
> This allows releasing RX/TX queue memory.
> ---
> We're using DPDK 16.04 and have a test suite which performs a sequence
> of separate tests of the type
> 
>    allocate mempool
>    rte_eth_dev_configure(port, n_rxq, n_txq, ...)
>    setup rx/tx queues
>    rte_eth_dev_start(port)
> 
>    <perform actual test>
> 
>    stop rx/tx queues
>    rte_eth_dev_stop(port)
> 
> -> rte_eth_dev_configure(port, 0, 0, ...)
>    
>    check that there are no leaks from the mempool
> 
> The crucial point is the marked line above. This is done so that the
> rx_queue_release/tx_queue_release callbacks in the PMD is called, so
> that mbufs allocated by the driver is released.

I think you are trying to use a side effect of rte_eth_dev_configure().
After calling rte_eth_dev_stop(), I would say the clean-up should be done
by rte_eth_dev_close().
Why not using close?