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Re: [Xen-users] Shared memory between Dom0 and DomU

  • To: xen-users@xxxxxxxxxxxxx
  • From: Xie White <wait.xen@xxxxxxxxx>
  • Date: Tue, 10 Sep 2013 11:06:52 -0400
  • Delivery-date: Tue, 10 Sep 2013 15:07:49 +0000
  • List-id: Xen user discussion <xen-users.lists.xen.org>

What I want to do is to enable memory_sharing on my Xen. 

I search the mails. I find some guys discussed this before.
Does someone can give me some advises?


This is great....

All VM's is HVM here...

Pasi Kärkkäinen escreveu:
On Thu, Apr 08, 2010 at 12:52:21PM -0300, Gilberto Nunes wrote:

   I'm testing 4.0 and see this option on xend-config...
   I read comment and wanna know more about it...

   This memory share work like KSM or not????

It works only for HVM guests.. I haven't tried it (yet), so I cannot tell you more..
You might want to discuss it on xen-devel mailinglist..

-- Pasi

   Pasi Kärkkäinen escreveu:

 On Thu, Apr 08, 2010 at 10:02:24AM -0300, Gilberto Nunes wrote:


 What the purpose of this option:


 Is this some KSM tecnology???

 Thanks for replay....

 Are you testing Xen 4.0 perhaps?

 -- Pasi

   Gilberto Nunes Ferreira
   Suporte T.I.
   Selbetti Gestão de Documentos
   (47) 3441-6004 / (47) 8861-6672
   Fax (47) 3441-6021


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2013/9/9 Xie White <wait.xen@xxxxxxxxx>
Memory Sharing 
allow sharing of identical pages between HVM guests
it‘s a feature of Xen, but it is under tech preview. 
I just want to enable this feature.
here is a link for xen 4.0.1.
I want to enable it in xen 4.2 or 4.3. I don't know whether this works.

2013/9/6 Ian Campbell <Ian.Campbell@xxxxxxxxxx>
On Thu, 2013-09-05 at 16:08 -0400, Xie White wrote:
> Hi, guys,
> I'm sorry to disturb you.
> I am a student. I want to use Xen to do some test about memory sharing
> between two domain. I am a newbie in Xen memory sharing. I want to set
> up a environment.
> I search on the internet. I find some patch for old version. However,
> I want to running on Xen 4.1 or 4.2 version. Does this still work? Can
> you help me? Can you give some instruction on this? or Can you give me
> some information?

What exactly do you mean by memory sharing between dom0 and domU?

> also, I want to know how the data structure "page_info" in xen connect
> with data structure "page" in linux kernel. Which source code files do
> I need to read?

I suggest you use tools such as grep to locate the relevant source file.


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