Re: [RFC PATCH 3/3] net: ethernet: ti: cpsw: add XDP support

From: Jakub Kicinski
Date: Thu Apr 18 2019 - 14:44:34 EST


On Thu, 18 Apr 2019 21:30:44 +0300, Ivan Khoronzhuk wrote:
> >> Here another thing bothering me, I send it to queue 0 always, instead of
> >> taking cpu num. Not sure about this, but I expect to have some tx queue
> >> not bind to cpu and didn't find a way it can be changed dynamically in
> >> redirect.
> >
> >Not sure I understand :)
>
> I mean, is there a capability to choose tx queue while XDP_REDIRECT or XDP_TX.
>
> From what I've seen it's taken by:
> qidx = smp_processor_id();
>
> What if I need to send classified traffic to hw queue 4 for instance...

I see, no we don't have any API for that, yet. I think all NICs which
implement XDP REDIRECT today will allocate a single normal prio queue
per CPU..