From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: Re: if hvm better than pv?why dd in hvm vm no
	larger than 50M, while pv greater than 50
Date: Tue, 26 Apr 2011 09:54:21 -0400
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On Tue, Apr 26, 2011 at 04:48:31PM +0800, yue wrote:
> 1.i find  pv disk'throughput is better than hvm. i want to know why?

Pick up "The definitive guide to the Xen hypervisor" book.
> 2.pci passthrough  is said to improve performance, if it is default method of IO-process.

Sure. But it also makes migration difficult.
>  3.do you familar with ocfs2's source code?

No.