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SubjectRe: finding out the boot cpu number from userspace
> assuming cpu 0 is the boot cpu sounds fragile/incorrect, but for irqbalanced
> I'd like to find out which cpu is the boot cpu, is there a good way of doing
> so ?
>
> The reason for needing this is that some firmware only likes running on the
> boot cpu so I need to bind firmware-related irq's to that cpu ideally.

On any sane arch, cpu 0 *IS* always the boot CPU, as we dynamically number
CPUs that way ... that doesn't mean that it's apicid 0. I believe that
PPC64 screwed this up, but AFAIK, everyone else gets it correct ... ;-)

M.

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