From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takuya Yoshikawa <takuya.yoshikawa@gmail.com>
Date: Tue, 17 Apr 2012 14:54:50 +0000
Subject: Re: [PATCH 00/13] KVM: MMU: fast page fault
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To: Avi Kivity <avi@redhat.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>, kvm-ppc@vger.kernel.org, Marcelo Tosatti <mtosatti@redhat.com>, Xiao Guangrong <xiaoguangrong.eric@gmail.com>, LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>

On Tue, 17 Apr 2012 15:41:39 +0300
Avi Kivity <avi@redhat.com> wrote:

> > Since there are many known algorithms to predict hot memory pages,
> > the userspace will be able to tune the frequency of GET_DIRTY_LOG for such
> > parts not to get too many faults repeatedly, if we can restrict the range
> > of pages to protect.
> >
> > This is the fine-grained control.
> 
> Do you want per-page control, or just range-based?

Difficult question.

For live migration, range-based control may be enough duo to the locality
of WWS.

Thanks,
	Takuya