On Wed, Aug 14, 2024 at 05:20:46PM -0700, Jakub Kicinski wrote: > On Wed, 14 Aug 2024 19:01:40 +0100 Joe Damato wrote: > > If it is, then the only option is to have the drivers pass in their > > IRQ affinity masks, as Stanislav suggested, to avoid adding that > > call to the hot path. > > > > If not, then the IRQ from napi_struct can be used and the affinity > > mask can be generated on every napi poll. i40e/gve/iavf would need > > calls to netif_napi_set_irq to set the IRQ mapping, which seems to > > be straightforward. > > It's a bit sad to have the generic solution blocked. > cpu_rmap_update() is exported. Maybe we can call it from our notifier? > rmap lives in struct net_device I agree on the sadness. I will take a look today. I guess if we were being really ambitious, we'd try to move ARFS stuff into the core (as RSS was moved into the core).
