linux-kernel - Re: [PATCH 5/9] kstaled: skip non-RAM regions.

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Message-Id: <20110928170334.a56e1695.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 28 Sep 2011 17:03:34 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Michel Lespinasse <walken@...gle.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Rik van Riel <riel@...hat.com>,
	Balbir Singh <bsingharora@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <jweiner@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Hugh Dickins <hughd@...gle.com>,
	Michael Wolf <mjwolf@...ibm.com>
Subject: Re: [PATCH 5/9] kstaled: skip non-RAM regions.

On Tue, 27 Sep 2011 17:49:03 -0700
Michel Lespinasse <walken@...gle.com> wrote:

> Add a pfn_skip_hole function that shrinks the passed input range in order to
> skip over pfn ranges that are known not bo be RAM backed. The x86
> implementation achieves this using e820 tables; other architectures
> use a generic no-op implementation.
> 
> 
> Signed-off-by: Michel Lespinasse <walken@...gle.com>

Hm, can't you use walk_system_ram_range() in kernel/resource.c ?
If it's enough, please update it.

Thanks,
-Kame

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