Date: Fri, 19 Feb 2010 08:30:06 +0000
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Michael Bohan <mbohan@codeaurora.org>
Cc: Mel Gorman <mel@csn.ul.ie>, linux-arm-kernel@lists.infradead.org,
       linux-mm@kvack.org, linux-kernel@vger.kernel.org,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
       linux-arm-msm@vger.kernel.org
Subject: Re: Kernel panic due to page migration accessing memory holes
Message-ID: <20100219083006.GA19649@n2100.arm.linux.org.uk>
References: <4B7C8DC2.3060004@codeaurora.org> <20100218100324.5e9e8f8c.kamezawa.hiroyu@jp.fujitsu.com> <4B7CF8C0.4050105@codeaurora.org> <20100218183604.95ee8c77.kamezawa.hiroyu@jp.fujitsu.com> <20100218100432.GA32626@csn.ul.ie> <4B7DEDB0.8030802@codeaurora.org>
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On Thu, Feb 18, 2010 at 05:47:28PM -0800, Michael Bohan wrote:
> I am actually using the pfn_valid implementation FLATMEM in  
> arch/arm/include/asm/memory.h.  This one is very similar to the  
> asm-generic, and has no knowledge of the holes.

Later kernels have a pfn_valid() which does have hole functionality.
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