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

From Thomas Gleixner <tglx@linutronix.de>
Newsgroups linux.kernel
Subject Re: [PATCH 07/14] genirq: Add a new generic IPI reservation code to irq core
Date 2015-11-07 14:40 +0100
Message-ID <qsbSO-2TM-15@gated-at.bofh.it> (permalink)
References <qqHN7-1ZB-7@gated-at.bofh.it> <qqHN8-1ZB-19@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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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Thread

[PATCH 07/14] genirq: Add a new generic IPI reservation code to irq core Qais Yousef <qais.yousef@imgtec.com> - 2015-11-03 12:20 +0100
  Re: [PATCH 07/14] genirq: Add a new generic IPI reservation code to  irq core kbuild test robot <lkp@intel.com> - 2015-11-03 13:10 +0100
  Re: [PATCH 07/14] genirq: Add a new generic IPI reservation code to  irq core Thomas Gleixner <tglx@linutronix.de> - 2015-11-07 13:20 +0100
  Re: [PATCH 07/14] genirq: Add a new generic IPI reservation code to  irq core Thomas Gleixner <tglx@linutronix.de> - 2015-11-07 14:40 +0100
    Re: [PATCH 07/14] genirq: Add a new generic IPI reservation code to  irq core Qais Yousef <qais.yousef@imgtec.com> - 2015-11-09 11:20 +0100

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