Re: [PATCH net-next 2/2] net_sched: sch_fq: add the ability to offload pacing

[Willem de Bruijn <willemdebruijn.kernel@gmail.com>]

Eric Dumazet wrote:
> From: Jeffrey Ji <jeffreyji@google.com>
> 
> Some network devices have the ability to offload EDT (Earliest
> Departure Time) which is the model used for TCP pacing and FQ packet
> scheduler.
> 
> Some of them implement the timing wheel mechanism described in
> https://saeed.github.io/files/carousel-sigcomm17.pdf
> with an associated 'timing wheel horizon'.
> 
> This patchs adds to FQ packet scheduler TCA_FQ_OFFLOAD_HORIZON
> attribute.
> 
> Its value is capped by the device max_pacing_offload_horizon,
> added in the prior patch.
> 
> It allows FQ to let packets within pacing offload horizon
> to be delivered to the device, which will handle the needed
> delay without host involvement.
> 
> Signed-off-by: Jeffrey Ji <jeffreyji@google.com>
> Signed-off-by: Eric Dumazet <edumazet@google.com>

Reviewed-by: Willem de Bruijn <willemb@google.com>