Hi, Is it possible to run a VM on top of Xen with RAM >= 4gb? This should cause all the iomem of the devices (both virtual & PT devices) to be in addresses above 4gb, which means that it will be addresses of 64-bit. Does the latest Xen (and/or Xen 3.4) support this? Tom _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On 24/10/2009 19:09, "Tom Rotenberg" <tom.rotenberg@gmail.com> wrote:> Is it possible to run a VM on top of Xen with RAM >= 4gb? This should > cause all the iomem of the devices (both virtual & PT devices) to be > in addresses above 4gb, which means that it will be addresses of > 64-bit. > Does the latest Xen (and/or Xen 3.4) support this?Yes, it works. Iomem is placed just below 4gb and the RAM that would appear there is shifted up above 4GB, just like on a real machine. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Sounds great... so, it should work out of the box, right? (I still haven''t tested it, as i need to get me a physical machine with enough amount of RAM) On Sat, Oct 24, 2009 at 8:20 PM, Keir Fraser <keir.fraser@eu.citrix.com> wrote:> On 24/10/2009 19:09, "Tom Rotenberg" <tom.rotenberg@gmail.com> wrote: > >> Is it possible to run a VM on top of Xen with RAM >= 4gb? This should >> cause all the iomem of the devices (both virtual & PT devices) to be >> in addresses above 4gb, which means that it will be addresses of >> 64-bit. >> Does the latest Xen (and/or Xen 3.4) support this? > > Yes, it works. Iomem is placed just below 4gb and the RAM that would appear > there is shifted up above 4GB, just like on a real machine. > > -- Keir > > >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Konrad Rzeszutek Wilk
2009-Oct-26 14:15 UTC
Re: [Xen-devel] Running a VM with more than 4GB?
On Sat, Oct 24, 2009 at 08:54:32PM +0200, Tom Rotenberg wrote:> Sounds great... so, it should work out of the box, right?Correct. Thought if you do find problems, please CC me on them.> (I still haven''t tested it, as i need to get me a physical machine > with enough amount of RAM)_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel