[Intel-wired-lan] [PATCH net-next v7 0/5] net: napi: add CPU affinity to napi->config

[Joe Damato]

On Tue, Feb 04, 2025 at 03:06:17PM -0700, Ahmed Zaki wrote:
> Drivers usually need to re-apply the user-set IRQ affinity to their IRQs
> after reset. However, since there can be only one IRQ affinity notifier
> for each IRQ, registering IRQ notifiers conflicts with the ARFS rmap
> management in the core (which also registers separate IRQ affinity
> notifiers).   
> 
> Move the IRQ affinity management to the napi struct. This way we can have
> a unified IRQ notifier to re-apply the user-set affinity and also manage
> the ARFS rmaps. The first patch  moves the ARFS rmap management to CORE.
> The second patch adds the IRQ affinity mask to napi_config and re-applies
> the mask after reset. Patches 3-5 use the new API for bnxt, ice and idpf
> drivers.

If there's another version maybe adding this to netdevsim might be
good?

Was just thinking that if one day in the distant future netdev-genl
was extended to expose the per NAPI affinity mask, a test could
probably be written.