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

[Jakub Kicinski]

On Tue,  4 Feb 2025 15:06:17 -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.

Hi Ahmed!

I put together a selftest for maintaining the affinity:
https://github.com/kuba-moo/linux/commit/de7d2475750ac05b6e414d7e5201e354b05cf146

It depends on a couple of selftest infra patches (in that branch) 
which I just posted to the list. But if you'd like you can use
it against your drivers.