From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx109.postini.com [74.125.245.109]) by kanga.kvack.org (Postfix) with SMTP id 431686B0044 for ; Fri, 14 Dec 2012 04:39:09 -0500 (EST) Message-ID: <50CAF3C9.3090906@cn.fujitsu.com> Date: Fri, 14 Dec 2012 17:39:21 +0800 From: Lai Jiangshan MIME-Version: 1.0 Subject: Re: [PATCH 1/2] memory-hotplug: Add help info for CONFIG_MOVABLE_NODE option References: <1355477270-19922-1-git-send-email-tangchen@cn.fujitsu.com> <1355477270-19922-2-git-send-email-tangchen@cn.fujitsu.com> In-Reply-To: <1355477270-19922-2-git-send-email-tangchen@cn.fujitsu.com> Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org List-ID: To: Tang Chen , akpm@linux-foundation.org Cc: isimatu.yasuaki@jp.fujitsu.com, kamezawa.hiroyu@jp.fujitsu.com, mel@csn.ul.ie, wency@cn.fujitsu.com, mingo@elte.hu, penberg@kernel.org, torvalds@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org On 12/14/2012 05:27 PM, Tang Chen wrote: > This patch adds help info for CONFIG_MOVABLE_NODE option. > > This option allows user to online all memory of a node as movable > memory. So that the whole node can be hotpluged. Users who don't > use hotplug feature are also fine with this option on since they > won't online memory as movable. > > Signed-off-by: Tang Chen > Reviewed-by: Yasuaki Ishimatsu > --- > mm/Kconfig | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/mm/Kconfig b/mm/Kconfig > index 71259e0..2ad51cb 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -150,6 +150,16 @@ config MOVABLE_NODE > depends on X86_64 > depends on NUMA > depends on BROKEN > + help > + Allow a node to have only movable memory. Pages used by kernel, such > + as direct mapping pages can not be migrated. So the corresponding > + memory device can not be hotpluged. This option allows users to > + online all the memory of a node as movable memory so that the whole > + node can be hotpluged. Users who don't use hotplug feature are fine > + with this option on since they don't online memory as movable. > + > + Say Y here if you want to hotplug a whole node. > + Say N here if you want kernel to use memory on all nodes evenly. Thank you for adding the help text which should have been done by me. Reviewed-by: Lai Jiangshan -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org