Re: [PATCH 00/13] KVM: MMU: fast page fault

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On Tue, 10 Apr 2012 19:58:44 +0800
Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx> wrote:

> No, i do not really agree with that.
> We really can get great benefit from O(1) especially if lockless write-protect
> is introduced for O(1), live migration is very useful for cloud computing
> architecture to balance the overload on all nodes.

Recently, you said to me that you were not familiar with live migration.
Actually you did not know the basics of pre-copy live migration.

I know live migration better than you because NTT has Kemari and it uses
live migration infrastructure.  My work is originated from the data
I got during profiling Kemari.

SRCU-less dirty logging was also motivated by the pressures from scheduler
developers.  Everything was really needed.

Have you ever used live migration for real service?

I cannot say whether O(1) is OK with me without any real background.

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