linux-kernel - Re: [RFC][PATCH][EXPERIMENTAL] CPU hotplug with frozen tasks

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Message-Id: <200704181907.10288.rjw@sisk.pl>
Date:	Wed, 18 Apr 2007 19:07:09 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	ego@...ibm.com
Cc:	Gautham Shenoy <ego.lkml@...il.com>,
	LKML <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Oleg Nesterov <oleg@...sign.ru>
Subject: Re: [RFC][PATCH][EXPERIMENTAL] CPU hotplug with frozen tasks

On Wednesday, 18 April 2007 11:42, Gautham R Shenoy wrote:
> Hi,
> 
> The patch looks good to me. 
> 
> On Mon, Apr 16, 2007 at 11:27:58PM +0200, Rafael J. Wysocki wrote:
> > 
> > ---
> >  Documentation/cpu-hotplug.txt             |    9 +++++++--
> >  arch/i386/kernel/cpu/intel_cacheinfo.c    |    2 ++
> >  arch/i386/kernel/cpu/mcheck/therm_throt.c |    2 ++
> >  arch/i386/kernel/cpuid.c                  |    2 ++
> 
> [snip]
> 
> Though I am wondering what might be the usecase for microcode! 

Well, for 2.6.21-rc I had to introduce the variable suspend_cpu_hotplug (in
cpu.c) and make the microcode driver use it to distinguish between the 'normal'
and suspend-related CPU hotplug.  I'd like to get rid of this ugliness ASAP.

> Guess we'll see that patch soon :-)

Yes, in a couple of days.  I have to make both patches apply to -mm first. :-)

Greetings,
Rafael
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