From mboxrd@z Thu Jan  1 00:00:00 1970
From: zhangzhi <zhangzhi2022@hotmail.com>
Subject: Copy-on write sharing
Date: Thu, 31 May 2012 01:39:31 -0700 (PDT)
Message-ID: <1338453571115-5709207.post@n5.nabble.com>
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Hi, list,

xen 4.0 release has said that it had a special feature of copy-on write
sharing of identical memory pages between VMs (HVM only). 
I just wanna know the source code that illustrate this feature. 
Is anyone have an idea about the this feature as well as its specific source
code? thanks. 

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