From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Received: from psmtp.com (na3sys010amx130.postini.com [74.125.245.130])
	by kanga.kvack.org (Postfix) with SMTP id F1BF96B0032
	for <linux-mm@kvack.org>; Thu, 15 Aug 2013 10:45:44 -0400 (EDT)
Received: by mail-qa0-f45.google.com with SMTP id l18so1765100qak.18
        for <linux-mm@kvack.org>; Thu, 15 Aug 2013 07:45:44 -0700 (PDT)
Date: Thu, 15 Aug 2013 10:45:38 -0400
From: Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH part5 0/7] Arrange hotpluggable memory as ZONE_MOVABLE.
Message-ID: <20130815144538.GC14606@htj.dyndns.org>
References: <20130812152343.GK15892@htj.dyndns.org>
 <52090D7F.6060600@gmail.com>
 <20130812164650.GN15892@htj.dyndns.org>
 <5209CEC1.8070908@cn.fujitsu.com>
 <520A02DE.1010908@cn.fujitsu.com>
 <CAE9FiQV2-OOvHZtPYSYNZz+DfhvL0e+h2HjMSW3DyqeXXvdJkA@mail.gmail.com>
 <520C947B.40407@cn.fujitsu.com>
 <20130815121900.GA14606@htj.dyndns.org>
 <520CCD41.5000508@cn.fujitsu.com>
 <CAE9FiQVArNd-voKZ1tYbwzJiN=ztXCgr-0sHwej3er02kHQvRQ@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAE9FiQVArNd-voKZ1tYbwzJiN=ztXCgr-0sHwej3er02kHQvRQ@mail.gmail.com>
Sender: owner-linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Tang Chen <tangchen@cn.fujitsu.com>, Tang Chen <imtangchen@gmail.com>, "H. Peter Anvin" <hpa@zytor.com>, Bob Moore <robert.moore@intel.com>, Lv Zheng <lv.zheng@intel.com>, "Rafael J. Wysocki" <rjw@sisk.pl>, Len Brown <lenb@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@linux-foundation.org>, Thomas Renninger <trenn@suse.de>, Jiang Liu <jiang.liu@huawei.com>, Wen Congyang <wency@cn.fujitsu.com>, Lai Jiangshan <laijs@cn.fujitsu.com>, Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>, Taku Izumi <izumi.taku@jp.fujitsu.com>, Mel Gorman <mgorman@suse.de>, Minchan Kim <minchan@kernel.org>, "mina86@mina86.com" <mina86@mina86.com>, "gong.chen@linux.intel.com" <gong.chen@linux.intel.com>, Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>, "lwoodman@redhat.com" <lwoodman@redhat.com>, Rik van Riel <riel@redhat.com>, "jweiner@redhat.com" <jweiner@redhat.com>, Prarit Bhargava <prarit@redhat.com>, Zhang Yanfei <zhangyanfei@cn.fujitsu.com>, "yanghy@cn.fujitsu.com" <yanghy@cn.fujitsu.com>, the arch/x86 maintainers <x86@kernel.org>, "linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Linux MM <linux-mm@kvack.org>, ACPI Devel Maling List <linux-acpi@vger.kernel.org>, "Luck, Tony (tony.luck@intel.com)" <tony.luck@intel.com>

Hello, Yinghai.

On Thu, Aug 15, 2013 at 07:37:59AM -0700, Yinghai Lu wrote:
> On Thu, Aug 15, 2013 at 5:44 AM, Tang Chen <tangchen@cn.fujitsu.com> wrote:
> 
> > Yes, the new behavior should be controlled by boot option.
> 
> No, should avoid boot option.

It's suboptimal behavior which is chosen as trade-off to enable
hotplug support and shouldn't be the default behavior just like node
data and page table should be allocated on the same node by default.
Why would we allocate kernel page table in low memory be default?

Thanks.

-- 
tejun

--
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: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>