linux-kernel - Re: [PATCH] change global zonelist order v4 [0/2]

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Date:	Thu, 3 May 2007 22:47:30 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, Linux-MM <linux-mm@...ck.org>,
	Christoph Lameter <clameter@....com>, Lee.Schermerhorn@...com
Subject: Re: [PATCH] change global zonelist order v4 [0/2]

On Fri, 27 Apr 2007 14:45:30 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:

> Hi, this is version 4. including Lee Schermerhon's good rework.
> and automatic configuration at boot time.

hm, this adds rather a lot of code.  Have we established that it's worth
it?

And it's complex - how do poor users know what to do with this new control?

This:

+ *	= "[dD]efault | "0"	- default, automatic configuration.
+ *	= "[nN]ode"|"1" 	- order by node locality,
+ *         			  then zone within node.
+ *	= "[zZ]one"|"2" - order by zone, then by locality within zone

seems a bit excessive.  I think just the 0/1/2 plus documentation would
suffice?

I haven't followed this discussion very closely I'm afraid.  If we came up
with a good reason why Linux needs this feature then could someone please
(re)describe it?

Thanks.
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