linux-kernel - Re: [PATCH v3 2/9] KVM: MMU: abstract spte write-protect

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Message-ID: <4F9238D6.3030706@gmail.com>
Date:	Sat, 21 Apr 2012 12:34:30 +0800
From:	Xiao Guangrong <xiaoguangrong.eric@...il.com>
To:	Takuya Yoshikawa <takuya.yoshikawa@...il.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>,
	Avi Kivity <avi@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH v3 2/9] KVM: MMU: abstract spte write-protect

On 04/21/2012 09:10 AM, Takuya Yoshikawa wrote:

> On Fri, 20 Apr 2012 18:33:19 -0300
> Marcelo Tosatti <mtosatti@...hat.com> wrote:
> 
>> It is preferable to remove all large sptes including read-only ones, the
>> current behaviour, then to verify that no read->write transition can
>> occur in fault paths (fault paths which are increasing in number).
>>
> 
> I think we should use separate function than spte_write_protect() for
> the large case.


I will introduce a function to handle large sptes when i implement the
idea of making writable spte to be read-only.

But, keep it in this patchset first.
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