linux-kernel - Re: [PATCH 1/5] memory-hotplug: x86_64: suitable memory should go to ZONE

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Message-ID: <53C9369B.4070608@intel.com>
Date:	Fri, 18 Jul 2014 08:00:43 -0700
From:	Dave Hansen <dave.hansen@...el.com>
To:	Wang Nan <wangnan0@...wei.com>, Ingo Molnar <mingo@...hat.com>,
	Yinghai Lu <yinghai@...nel.org>, Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	Pei Feiyue <peifeiyue@...wei.com>, linux-mm@...ck.org,
	x86@...nel.org, linux-ia64@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-sh@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] memory-hotplug: x86_64: suitable memory should go
 to ZONE_MOVABLE

On 07/18/2014 12:55 AM, Wang Nan wrote:
> +	if (!zone_is_empty(movable_zone))
> +		if (zone_spans_pfn(movable_zone, start_pfn) ||
> +				(zone_end_pfn(movable_zone) <= start_pfn))
> +			zone = movable_zone;
> +

It's nice that you hit so many architectures, but is there a way to do
this that doesn't involve copying and pasting the same bit of code in to
each architecture?
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