linux-kernel - [question] on which cpu an interrupt controller will raise an irq ?

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Message-ID: <5484BBC8.7080304@linaro.org>
Date:	Sun, 07 Dec 2014 21:42:48 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Nicolas Pitre <nicolas.pitre@...aro.org>
Subject: [question] on which cpu an interrupt controller will raise an irq
 ?

Hi all,

I am not very familiar with the interrupt subsystem, so sorry if this 
sounds a stupid question.

IIUC, when a interrupt happens on a SMP system and if there is no 
affinity set for it, it is delivered following a scheme decided by the 
interrupt controller.

For example, for the APIC, there is a round robin behaviour, so an 
interrupt will be raised on cpu0, then cpu1, and so on ...

Is there a way to know on which cpu a controller will raise the interrupt ?

Thanks in advance

   -- Daniel

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