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Date: Mon, 13 Jan 2014 17:29:43 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Toshi Kani <toshi.kani@hp.com>
CC: Prarit Bhargava <prarit@redhat.com>,
        KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
        Bodo Eggert <7eggert@gmx.de>, LKML <linux-kernel@vger.kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        the arch/x86 maintainers <x86@kernel.org>, Len Brown <lenb@kernel.org>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>, Linn Crosetto <linn@hp.com>,
        Pekka Enberg <penberg@kernel.org>, Yinghai Lu <yinghai@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Tang Chen <tangchen@cn.fujitsu.com>,
        Wen Congyang <wency@cn.fujitsu.com>, Vivek Goyal <vgoyal@redhat.com>,
        dyoung@redhat.com, linux-acpi@vger.kernel.org,
        "linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [PATCH 2/2] x86, e820 disable ACPI Memory Hotplug if memory mapping
 is specified by user [v2]
References: <1389380698-19361-1-git-send-email-prarit@redhat.com>		 <1389380698-19361-4-git-send-email-prarit@redhat.com>		 <alpine.DEB.2.02.1401111624170.20677@be1.lrz>	 <52D32962.5050908@redhat.com>		 <CAHGf_=qWB81f8fdDdjaXXh1JoSDUsJmcEHwH+CEJ2E-5XWz6qA@mail.gmail.com>		 <52D4793E.8070102@redhat.com> <1389659632.1792.247.camel@misato.fc.hp.com>	 <52D48A9D.7000003@zytor.com> <1389661746.1792.254.camel@misato.fc.hp.com>
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On 01/13/2014 05:09 PM, Toshi Kani wrote:
> 
> In majority of the cases, memmap=exactmap is used for kdump and the
> firmware info is sane.  So, I think we should keep NUMA enabled since it
> could be useful when multiple CPUs are enabled for kdump.
> 

Rather unlikely since all of the kdump memory is likely to sit in a
single node.

	-hpa


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