linux-kernel - Re: Inquiry: Should we remove "isolcpus= kernel boot option? (may have realtime uses)

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Message-ID: <48470250.6010803@compro.net>
Date:	Wed, 04 Jun 2008 17:00:00 -0400
From:	Mark Hounschell <markh@...pro.net>
To:	Paul Jackson <pj@....com>
CC:	Mark Hounschell <dmarkh@....rr.com>, nickpiggin@...oo.com.au,
	a.p.zijlstra@...llo.nl, ioe-lkml@...eria.de,
	linux-kernel@...r.kernel.org, kernel@...ivas.org, dfults@....com,
	devik@....cz, sivanich@....com, dino@...ibm.com,
	emmanuel.pacaud@...v-poitiers.fr, deweerdt@...e.fr, mingo@...e.hu,
	colpatch@...ibm.com, maxk@...lcomm.com, rostedt@...dmis.org,
	oleg@...sign.ru, paulmck@...ibm.com, menage@...gle.com,
	rddunlap@...l.org, suresh.b.siddha@...el.com, tglx@...utronix.de
Subject: Re: Inquiry: Should we remove "isolcpus= kernel boot option? (may
 have realtime uses)

Paul Jackson wrote:
> Mark wrote:
>> What is an abonination, is that cpusets are equired for this type of 
>> isolation to begin with, even on a 2 processor machine.
> 
> Just to be sure I'm following you here, you stating that you
> want to be able to manipulate the isolated cpu map at runtime,
> not just with the boot option isolcpus, right? 
> Where this
> isolated cpu map works just fine even on systems which do
> not have cpusets configured, right?
>

Yes to both questions. However after reading Max and Peter's response, I
guess there is another, probably better or _only_, way to get what I really
need anyway so please don't consider my intrusion into this thread as a NAK.

I do not rely on this option as it is implemented. 

Regards
Mark
  



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