Re: [PATCH net-next v2 5/6] net: dsa: mv88e6xxx: MQPRIO support

Luke Howard <[email protected]> Wed, 3 Jun 2026 10:15:37 +1000
Newsgroups dev.linux.lists.bridge,org.kernel.vger.linux-kernel,org.kernel.vger.linux-kselftest,org.kernel.vger.netdev
Message-ID <[email protected]>

> On 3 Jun 2026, at 9:55 am, Andrew Lunn <[email protected]> wrote:
> 
>> But there’s an alternative, more invasive, solution where the MQPRIO
>> configuration is attached to the bridge itself.
> 
> What about ports which are not attached to a bridge? They are just
> standalone, have an IP address of their own, etc.

That is a good point. So, barring a switch feature I’ve not yet found, I think the only options are either to drop MQPRIO offload, or to accept that ports with no MQPRIO mapping inherit the per-switch mapping. Arguably that’s the case today anyway (each chip has its own default frame priority to queue mapping), so the user should have no expectation of queue assignment on a port that hasn’t been configured.

Luke