linux-kernel - Re: [patch 02/41] cpu alloc: The allocator

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Message-Id: <20080530145612.fd930335.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 30 May 2008 14:56:12 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Christoph Lameter <clameter@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	David Miller <davem@...emloft.net>,
	Eric Dumazet <dada1@...mosbay.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Mike Travis <travis@....com>
Subject: Re: [patch 02/41] cpu alloc: The allocator

On Thu, 29 May 2008 22:10:25 -0700 (PDT)
Christoph Lameter <clameter@....com> wrote:

> On Thu, 29 May 2008, Andrew Morton wrote:
> 
> > > +config CPU_ALLOC_SIZE
> > > +	int "Size of cpu alloc area"
> > > +	default "30000"
> > 
> > strange choice of a default?  I guess it makes it clear that there's no
> > particular advantage in making it a power-of-two or anything like that.
> 
> The cpu alloc has a cpu_bytes field in vmstat that shows how much memory 
> is being used. 30000 seemed to be reasonable after staring at these 
> numbers for awhile.
> 

30000 is suitable for both of 32bits/64bits arch ?

Thanks,
-kame

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