linux-kernel - Re: [PATCH] module: kzalloc mod->ref

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Message-ID: <20090114205357.GA25473@bombadil.infradead.org>
Date:	Wed, 14 Jan 2009 15:53:57 -0500
From:	Kyle McMartin <kyle@...radead.org>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Valdis.Kletnieks@...edu, Kyle McMartin <kyle@...radead.org>,
	rusty@...tcorp.com.au, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] module: kzalloc mod->ref

On Wed, Jan 14, 2009 at 09:37:18PM +0100, Takashi Iwai wrote:
> At Wed, 14 Jan 2009 14:29:08 -0500,
> Valdis.Kletnieks@...edu wrote:
> > 
> > On Wed, 14 Jan 2009 17:25:31 +0100, Takashi Iwai said:
> > 
> > > We can use nr_cpu_ids instead of NR_CPUS.
> > > For a machine like 4096 CPUs, such an amount of memory is like a
> > > peanut :)
> > 
> > It's not peanuts if you're dealing with a distro kernel that's essentially
> > forced to compile with NR_CPUS=<some moby integer>, but booting on a single or
> > dual core system with possibly not even 1G of memory.
> 
> My suggestion above is to use nr_cpu_ids, which is the actual number
> of CPUs, not a constant like NR_CPUS.
> 

Yes, I agree that it's a better solution, since I suppose it's based on
cpu_possible_mask as opposed to, well, the maximum possible.

I'll fire off an updated patch. Let's see what rusty thinks.

cheers, Kyle
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