| From | Thomas Gleixner <> | Subject | Re: [PATCH v6 01/29] irq/matrix: Expose functions to allocate the best CPU for new vectors | Date | Fri, 06 May 2022 21:48:28 +0200 |
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Ricardo,
On Thu, May 05 2022 at 16:59, Ricardo Neri wrote: > Certain types of interrupts, such as NMI, do not have an associated vector. > They, however, target specific CPUs. Thus, when assigning the destination > CPU, it is beneficial to select the one with the lowest number of > vectors.
Why is that beneficial especially in the context of a NMI watchdog which then broadcasts the NMI to all other CPUs?
That's wishful thinking perhaps, but I don't see any benefit at all.
> Prepend the functions matrix_find_best_cpu_managed() and > matrix_find_best_cpu_managed()
The same function prepended twice becomes two functions :)
> with the irq_ prefix and expose them for > IRQ controllers to use when allocating and activating vector-less IRQs.
There is no such thing like a vectorless IRQ. NMIs have a vector. Can we please describe facts and not pulled out of thin air concepts which do not exist?
Thanks,
tglx
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