linux-kernel - Re: [PATCH 1/4] KVM: MMU: don't drop spte if overwrite it from W to RO

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Message-ID: <4CDFBF5B.10706@redhat.com>
Date:	Sun, 14 Nov 2010 12:52:11 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH 1/4] KVM: MMU: don't drop spte if overwrite it from W
 to RO

On 11/12/2010 12:30 PM, Xiao Guangrong wrote:
> We just need flush tlb if overwrite a writable spte with a read-only one
>

What are the advantages?  Avoid playing with rmap, and avoid a window 
where the spte is missing?

(they are worth the patch, just seeing if I'm not missing something)

-- 
error compiling committee.c: too many arguments to function

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