linux-kernel - Re: [PATCH] memory hotplug: memmap_init

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Message-Id: <20080509152519.1b14e016.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 9 May 2008 15:25:19 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Yasunori Goto <y-goto@...fujitsu.com>,
	Dave Hansen <haveblue@...ibm.com>,
	Gerald Schaefer <gerald.schaefer@...ibm.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] memory hotplug: memmap_init_zone called twice.

On Fri, 9 May 2008 08:04:25 +0200
Heiko Carstens <heiko.carstens@...ibm.com> wrote:

> Subject: [PATCH] memory hotplug: memmap_init_zone called twice.
> 
> From: Heiko Carstens <heiko.carstens@...ibm.com>
> 
> __add_zone calls memmap_init_zone twice if memory gets attached to
> an empty zone. Once via init_currently_empty_zone and once explictly
> right after that call.
> Looks like this is currently not a bug, however the call is
> superfluous and might lead to subtle bugs if memmap_init_zone gets
> changed. So make sure it is called only once.
> 
seems reasonable. Thank you!

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

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