linux-kernel - Re: [PATCH] x86, acpi memory hotplug, add parameter to disable memory hotplug

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Message-ID: <52D4A469.9090100@jp.fujitsu.com>
Date:	Tue, 14 Jan 2014 11:43:53 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	Toshi Kani <toshi.kani@...com>, Prarit Bhargava <prarit@...hat.com>
CC:	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Len Brown <lenb@...nel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Linn Crosetto <linn@...com>, Pekka Enberg <penberg@...nel.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tang Chen <tangchen@...fujitsu.com>,
	Wen Congyang <wency@...fujitsu.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Dave Young <dyoung@...hat.com>, <linux-acpi@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH] x86, acpi memory hotplug, add parameter to disable memory
 hotplug

(2014/01/14 10:41), Toshi Kani wrote:
> On Tue, 2014-01-14 at 10:11 +0900, Yasuaki Ishimatsu wrote:
>   :
>>>> I think we need a knob manually enable mem-hotplug when specify memmap. But
>>>> it is another story.
>>>>
>>>> Acked-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
>>>
>>> As mentioned, self-NAK.  I have seen a system that I needed to specify
>>> memmap=exactmap & had hotplug memory.  I will only keep the acpi_no_memhotplug
>>> option in the next version of the patch.
>>
>>
>> Your following first patch is simply and makes sense.
>>
>> http://marc.info/?l=linux-acpi&m=138922019607796&w=2
>>
>
> In this option, it also requires changing kexec-tools to specify the new
> option for kdump.  It won't be simpler.

Hmm.
I use memm= boot option and hotplug memory for memory hot-remove.
At least, the patch cannot be accepted.

Thanks,
Yasuaki Ishimatsu

>
> Thanks,
> -Toshi
>
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