linux-kernel - Re: [PATCH x86] [15/16] Force __cpuinit on for CONFIG_PM without HOTPLUG

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Date:	Thu, 10 Jan 2008 17:09:12 +0200
From:	Adrian Bunk <bunk@...nel.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	rjw@...k.pl, pavel@...e.cz, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH x86] [15/16] Force __cpuinit on for CONFIG_PM without
	HOTPLUG_CPU

On Thu, Jan 10, 2008 at 02:12:59PM +0100, Andi Kleen wrote:
> Adrian Bunk <bunk@...nel.org> writes:
> >
> > Technically you are the one who has to deal with problems in your 
> > patches, not the people pointing at the problems.
> 
> If you believe that my patch adds a new problem then please describe
> it clearly so that I can understand it.

Description:
- there are already __cpuinit* annotations in the kernel
- on UP kernels supporting suspend/resume, such annotated code
  currently gets freed after booting (and this works)
- with your patch applied, this code no longer gets freed

Whether or not this is a problem depends on whether you care about the 
memory used by the kernel or not...

My other issues with your patch were:
- whatever warning this patch was supposed to fixed was not shown
  (the patch description didn't mention any warning at all) - and
  understanding a fix gets easier when you know the problem it's
  supposed to fix
- this patch shouldn't be x86 specific since the issue how to 
  annotate suspend and CPU hotplug code isn't x86 specific

> -Andi

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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