From mboxrd@z Thu Jan  1 00:00:00 1970
From: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Subject: Re: [PATCH v2 4/5] KVM: MMU: introduce page_fault_start and page_fault_end
Date: Thu, 20 Sep 2012 10:59:49 +0800
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Cc: Avi Kivity <avi@redhat.com>, LKML <linux-kernel@vger.kernel.org>,
	KVM <kvm@vger.kernel.org>
To: Marcelo Tosatti <mtosatti@redhat.com>
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On 09/19/2012 07:43 AM, Marcelo Tosatti wrote:

>>> - error pfn / mmio pfn / invalid pfn relation
>>>
>>> Have the meaning of this bits unified in a single function/helper, see
>>> comment to patch 1 (perhaps you can further improve).
>>
>> Sorry, more detail?
> 
> Should force the reader of the code to understand error pfn / mmio pfn /
> invalid pfn in a single helper. That is, avoid using error pfn at all.

Reasonable suggestion, i will think about it more. Thank you, Marcelo!