docs: update the wireless-ap percpu analysis for #686 - #692
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#686 (per-CPU CPU-pinned kthreads for `spawn`, sleepable) reshapes the per-CPU authenticator: the handshake's keying and PBKDF2 can run inline in a per-CPU worker, so the softirq two-tier split is a fallback, not the premise. Rework the per-CPU sections and open questions to lead with the spawned worker + AF_PACKET fanout candidate, keeping EAPOL visibility and STA affinity as the open, spike-answered questions. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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#686 (per-CPU CPU-pinned kthreads for
spawn, sleepable) reshapes the per-CPU authenticator in the wireless-ap design: the handshake's keying and PBKDF2 can now run inline in a per-CPU worker, so the softirq two-tier split becomes a fallback rather than the premise.This updates the design docs (
README.md,plan.md,kernel-notes.md) to:spawn ... percpu(#686) as a CPU-pinned kthread per CPU (process context, sleepable) and its two authenticator shapes (spawned worker vs softirq hook);AF_PACKETPACKET_FANOUTcandidate;AF_PACKETon an AP netdev, and STA affinity vs shared state.Docs only; no code change.
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