linux-kernel - Re: [PATCH 04/12] KVM: MMU: log dirty page after marking spte writable

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Message-ID: <20131120003521.GA15809@amt.cnet>
Date:	Tue, 19 Nov 2013 22:35:21 -0200
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
Cc:	gleb@...hat.com, avi.kivity@...il.com, pbonzini@...hat.com,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH 04/12] KVM: MMU: log dirty page after marking spte
 writable

On Tue, Nov 19, 2013 at 10:29:20PM -0200, Marcelo Tosatti wrote:
> A call to GET_DIRTY_LOG guarantees to return correct information about 
> dirty pages before invocation of the previous GET_DIRTY_LOG call.

> Can you explain why it is OK to relax this rule?

That is, this might be OK, but better understand why it is.

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