[dpdk-dev] [PATCH] build: add option to override max ethports

[Bruce Richardson]

On Wed, Jan 30, 2019 at 09:18:58PM -0500, Chas Williams wrote:
> Allow users and packagers to override the default RTE_MAX_ETHPORTS.
> This adds a new meson option, max_ethports which defaults to the
> current value.
> 
> Signed-off-by: Chas Williams <3chas3 at gmail.com>

Agree with the idea. Just one small comment below re alphabetical order.

Otherwise:
Acked-by: Bruce Richardson <bruce.richardson at intel.com>

> ---
>  config/meson.build  | 1 +
>  config/rte_config.h | 1 -
>  meson_options.txt   | 2 ++
>  3 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/config/meson.build b/config/meson.build
> index db32499b3..e59507065 100644
> --- a/config/meson.build
> +++ b/config/meson.build
> @@ -103,6 +103,7 @@ endforeach
>  # set other values pulled from the build options
>  dpdk_conf.set('RTE_MAX_LCORE', get_option('max_lcores'))
>  dpdk_conf.set('RTE_MAX_NUMA_NODES', get_option('max_numa_nodes'))
> +dpdk_conf.set('RTE_MAX_ETHPORTS', get_option('max_ethports'))
>  dpdk_conf.set('RTE_LIBEAL_USE_HPET', get_option('use_hpet'))
>  dpdk_conf.set('RTE_EAL_ALLOW_INV_SOCKET_ID', get_option('allow_invalid_socket_id'))
>  # values which have defaults which may be overridden
> diff --git a/config/rte_config.h b/config/rte_config.h
> index d3732e953..7606f5d7b 100644
> --- a/config/rte_config.h
> +++ b/config/rte_config.h
> @@ -51,7 +51,6 @@
>  #define RTE_PKTMBUF_HEADROOM 128
>  
>  /* ether defines */
> -#define RTE_MAX_ETHPORTS 32
>  #define RTE_MAX_QUEUES_PER_PORT 1024
>  #define RTE_ETHDEV_QUEUE_STAT_CNTRS 16
>  #define RTE_ETHDEV_RXTX_CALLBACKS 1
> diff --git a/meson_options.txt b/meson_options.txt
> index 574054597..e54eedc66 100644
> --- a/meson_options.txt
> +++ b/meson_options.txt
> @@ -28,3 +28,5 @@ option('use_hpet', type: 'boolean', value: false,
>  	description: 'use HPET timer in EAL')
>  option('tests', type: 'boolean', value: true,
>  	description: 'build unit tests')
> +option('max_ethports', type: 'string', value: '32',
> +	description: 'maximum number of Ethernet devices in EAL')
> -- 

We are trying to keep the options in alphabetical order, so this setting
should be just before "max_lcores" rather than at the end.

Interestingly, I see that since 0.45 there is now the option of an
"integer" option type. We should probably switch to use that once we bump
our minimum meson version. [Luca, perhaps another change for your set?]
Ref: http://mesonbuild.com/Build-options.html#integers