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

[Thomas Gleixner]

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.

Thanks,

	tglx


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