Re: [PATCH 07/14] genirq: Add a new generic IPI reservation code to irq core

From: Thomas Gleixner
Date: Sat Nov 07 2015 - 08:32:33 EST

On Tue, 3 Nov 2015, Qais Yousef wrote:
> +
> + /* always allocate a virq per cpu */
> + nr_irqs = ipi_mask_weight(dest);

That's not really a good assumption. Not all architectures need
seperate interrupt numbers / descriptors because they can allocate
from a per cpu interrupt space. We really want to handle that here as
well. So we need a flag in the IPI domain which tells us whether that
allocation needs to be weight(desc) or 1.



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