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Re: [Xen-devel] Xen Memory De-duplication

from [Tim Deegan] [Permanent Link][Original]
To: Aditya Gadre <adivb2003@xxxxxxxxx>
Subject: Re: [Xen-devel] Xen Memory De-duplication
From: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Date: Mon, 11 Oct 2010 13:59:46 +0100
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At 18:56 +0100 on 09 Oct (1286650583), Aditya Gadre wrote:
> Is such a approach implemented?  We intend to implement this as a
> project. What are the suspected challanges?

Yes, this was implemented last year; the patches are in the xen-unstable
tree.  They hook the read path in blocktap to detect duplicate reads of
the same block and turn them into copy-on-write mappings in the
hypervisor.  

Cheers,

Tim.

-- 
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, XenServer Engineering
Citrix Systems UK Ltd.  (Company #02937203, SL9 0BG)

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