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Re: [Xen-users] Xen and the 4Gig memory Limit

To: xen-users@xxxxxxxxxxxxxxxxxxx, Andrew Turnbull <abturnbull@xxxxxxxxx>
Subject: Re: [Xen-users] Xen and the 4Gig memory Limit
From: Mark Williamson <mark.williamson@xxxxxxxxxxxx>
Date: Wed, 29 Jun 2005 19:41:58 +0100
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> >From Xen 3 onwards will the memory limit be increased from 4GB ?
> IS there a way to increase memory for xen right now ?

The situation is:

* Xen 2.0 does not support PAE, which is needed to support more than 4GB of 
physical memory.  You can have a maximum of 4GB (minus some for Xen) 
allocated to any domain and the allocations must total < 4GB.
* Xen 3.0:
  - you'll be able to use PAE so that the system can have more than 4GB total.  
Also, individual guests will be able to use more than 4GB.
  - support for x86_64 will also allow you to use large memory hosts / guests.


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