linux-kernel - Re: Is there a way to offload everything from cpu0 to other cpus?

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Date:	Mon, 8 Aug 2011 17:41:39 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Andy Lutomirski <luto@....edu>
Cc:	"Yung, Winson W" <winson.w.yung@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Is there a way to offload everything from cpu0 to other cpus?

On Fri, Aug 5, 2011 at 8:48 PM, Andy Lutomirski <luto@....edu> wrote:
> On 08/04/2011 10:53 PM, Yung, Winson W wrote:
>>
>> Hi, I would like to know whether it is possible to offload everything
>> (kernel threads/user apps) to cpu1...x so that I can force cpu0 go into
>> idle?
>>
>> I can affinity all the interrupt to a different cpu by playing with the
>> /proc/irq/irqx/smp_affinity, how about everything else?
>>
>
> You probably want the isolcpus boot option.
>

I think Yung was looking for an interface to move tasks dynamically
after the system is boot.

Yung, why /sys/devices/system/cpu/cpuX/online doesn't work for you?
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