linux-kernel - Re: [PATCH] x86: Issue a warning if number of present CPUs > maxcpus and CONFIG

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Message-ID: <20140217190704.GA24390@khazad-dum.debian.net>
Date:	Mon, 17 Feb 2014 16:07:04 -0300
From:	Henrique de Moraes Holschuh <hmh@....eng.br>
To:	Petr Tesarik <ptesarik@...e.cz>
Cc:	Jan Beulich <JBeulich@...e.com>, Borislav Petkov <bp@...en8.de>,
	x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] x86: Issue a warning if number of present CPUs > maxcpus
 and CONFIG_HOTPLUG=n

On Mon, 17 Feb 2014, Petr Tesarik wrote:
> This results in:
> 
>   total_cpus = 1008   /* this is purely informative, it is *NOT* used
>                          to size anything */
>   possible = 48       /* clamped to nr_cpu_ids */
> 
> A warning message (with or without my patch):
>   1024 Processors exceeds NR_CPUS limit of 48
> 
> Informative message:
>   Allowing 16 CPUs, 32 hotplug CPUs
> 
> No other warning (with or without my patch).

I'd rather no warnings were printed at all (user asked for that nr_cpus,
there is no reason to warn him about it), but your patch didn't cause any
_new_ warnings to be printed anyway.

So, please ignore my comment.  There's no need to change anything in your
patch on my account.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
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