Re: [dpdk-dev] [PATCH v4 2/2] net/mlx5: check delay drop settings in kernel driver

[Slava Ovsiienko <viacheslavo@nvidia.com>]

> -----Original Message-----
> From: Bing Zhao <bingz@nvidia.com>
> Sent: Thursday, November 4, 2021 19:59
> To: Slava Ovsiienko <viacheslavo@nvidia.com>; Matan Azrad
> <matan@nvidia.com>
> Cc: dev@dpdk.org; Raslan Darawsheh <rasland@nvidia.com>; NBU-Contact-
> Thomas Monjalon <thomas@monjalon.net>; Ori Kam <orika@nvidia.com>
> Subject: [PATCH v4 2/2] net/mlx5: check delay drop settings in kernel driver
> 
> The delay drop is the common feature managed on per device basis and the
> kernel driver is responsible one for the initialization and rearming.
> 
> By default, the timeout value is set to activate the delay drop when the
> driver is loaded.
> 
> A private flag "dropless_rq" is used to control the rearming. Only when it is
> on, the rearming will be handled once received a timeout event. Or else, the
> delay drop will be deactivated after the first timeout occurs and all the Rx
> queues won't have this feature.
> 
> The PMD is trying to query this flag and warn the application when some
> queues are created with delay drop but the flag is off.
> 
> The documents are also updated in this commit.
> 
> Signed-off-by: Bing Zhao <bingz@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>