Re: [Xen-users] High Memory Support on systems >1GB

[Ernst Bachmann <e.bachmann@xxxxxxxx>]

On Friday 13 January 2006 05:55, John A. Sullivan III wrote:
> On a Xen 2.0.7 host with between one and four GB of RAM but no single
> domain larger than 880MB, how should kernel High Memory Support be
> configured? Should it be off since no domain kernel is using more than
> 880? Should dom0 have it enabled to manage all the memory? Should all
> the domains have it since they are drawing on a pool larger than 880 MB?
>
> Is the answer the same for Xen 3.0? Thanks - John

Since the xen hypervisor needs the same highmem setting as the kernels running 
on it, you need the following settings to use all your ram:

- 1 GB: no highmem needed
1-3 GB: 3GB higmem
4GB: PAE or 64bit

and yes, its the same for xen3

/Ernst

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