linux-kernel - Re: [patch 1/4] Make the per cpu reserve configurable

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Message-ID: <48D58401.4070403@linux-foundation.org>
Date:	Sat, 20 Sep 2008 18:15:13 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, jeremy@...p.org, ebiederm@...ssion.com,
	travis@....com, herbert@...dor.apana.org.au, xemul@...nvz.org,
	penberg@...helsinki.fi
Subject: Re: [patch 1/4] Make the per cpu reserve configurable

KAMEZAWA Hiroyuki wrote:
> Is this PERCPU_MODULE_RESERVE default size is fixex to 8192 bytes
> both on 32bit-arch and 64bit-arch ?
>   
Yes.
> How about enlarging this to twice on 64bit arch now ?
>
> sorry for noise.
No actually a good idea to discuss the limit here. Maybe use 10000 for 32 bit and 15000 for 64 bit? Many percpu variables are counters that may be integers.



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