netdev - Re: [PATCH net-next v6 0/5] net: napi: add CPU affinity to napi->config

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Message-ID: <20250120170358.3f4181a6@kernel.org>
Date: Mon, 20 Jan 2025 17:03:58 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Ahmed Zaki <ahmed.zaki@...el.com>
Cc: netdev@...r.kernel.org, intel-wired-lan@...ts.osuosl.org,
 andrew+netdev@...n.ch, edumazet@...gle.com, horms@...nel.org,
 pabeni@...hat.com, davem@...emloft.net, michael.chan@...adcom.com,
 tariqt@...dia.com, anthony.l.nguyen@...el.com,
 przemyslaw.kitszel@...el.com, jdamato@...tly.com, shayd@...dia.com,
 akpm@...ux-foundation.org, shayagr@...zon.com,
 kalesh-anakkur.purayil@...adcom.com
Subject: Re: [PATCH net-next v6 0/5] net: napi: add CPU affinity to
 napi->config

On Fri, 17 Jan 2025 17:33:30 -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. Patches 1 and 2 move the ARFS rmap management to CORE.
> Patch 3 adds the IRQ affinity mask to napi_config and re-applies the mask
> after reset. Patches 4-6 use the new API for bnxt, ice and idpf drivers.

Sorry for not-super-in-depth reviews, the patches didn't apply for me :(
But feels like we are pretty close.
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