linux-kernel - Re: Question: How to distribute the interrupts over multiple cores?

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Message-ID: <CAAO_Xo7CTzow1TN+4bmmHH9KB4NSLRv5ZsOmwEC2KGTxDc-1Ug@mail.gmail.com>
Date:	Mon, 25 Mar 2013 17:00:03 +0800
From:	Lenky Gao <lenky.gao@...il.com>
To:	Lin Feng <linfeng@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org, yinghai@...nel.org, mingo@...e.hu,
	gorcunov@...il.com, rusty@...tcorp.com.au, sivanich@....com,
	agordeev@...hat.com
Subject: Re: Question: How to distribute the interrupts over multiple cores?

I have found a comment in function physflat_cpu_mask_to_apicid to explain why.

static unsigned int physflat_cpu_mask_to_apicid(const struct cpumask *cpumask)
{
	int cpu;

	/*
	 * We're using fixed IRQ delivery, can only return one phys APIC ID.
	 * May as well be the first.
	 */
...

This is mean i can not distribute the interrupts over multiple cores
when the machine have more than 8 cores?


-- 
Regards,

Lenky
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