Re: [RFC PATCH 8/8] PCI: Probe inline from node-local workqueue workers

[sashiko-bot@kernel.org]

> pci_call_probe() dispatches each probe with queue_work_on() to a
> housekeeping CPU of the device's node, except where it already probes
> inline. A VF added by one of the preceding node-placed async VF-add
> workers already executes on its device's node, so the dispatch buys it no
> locality: it funnels every VF probe through the single CPU
> cpumask_any_and() elects and re-serializes the parallel enable at the
> probe step.
> 
> Call local_pci_probe() directly when the caller is a workqueue worker
> (PF_WQ_WORKER) whose current CPU is on the device's node and in the same
> HK_TYPE_DOMAIN housekeeping mask the dispatch elects from. The gate is
> not VF-specific: any probe already running in a node-local housekeeping
> kworker takes it, while a probe from a task that is not a worker keeps
> the dispatch.
> 
> Assisted-by: LLM
> Signed-off-by: Pavol Sakac <sakacpav@amazon.de>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260911-vfopt-s1-v1-0-693271dc0226@amazon.de?part=8