linux-kernel - Re: /sys/devices/system/cpu/cpuX/online are missing

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Message-ID: <jetzwpscjk.fsf@sykes.suse.de>
Date:	Tue, 13 Mar 2007 10:44:31 +0100
From:	Andreas Schwab <schwab@...e.de>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	Giuliano Pochini <pochini@...ise.shiny.it>,
	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	spyro@....com, rmk@....linux.org.uk
Subject: Re: /sys/devices/system/cpu/cpuX/online are missing

Heiko Carstens <heiko.carstens@...ibm.com> writes:

> On Tue, Mar 13, 2007 at 01:39:25AM +0100, Andreas Schwab wrote:
>> Giuliano Pochini <pochini@...ise.shiny.it> writes:
>> 
>> > I had a look at arch/powerpc/kernel/smp.c but I'm not familiar at all with 
>> > those parts of the kernel.
>> 
>> See arch/powerpc/kernel/sysfs.c:topology_init.  I don't think there is
>> anything to do here.  You probably don't have CONFIG_HOTPLUG_CPU enabled.
>
> I was referring to arch/ppc not arch/powerpc.

Sorry, I missed that part.

> But it seems that arch/ppc doesn't support cpu hotplug anyway.

I think if there is no hotplug support then the file should not be created
in the first place.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@...e.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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