RE: [Xen-users] xen3.0.2 4G ram

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

To be able to see more than about 3.5GB of actual RAM, you need to
enable HIGHMEM64G (which translates to PAE in the processor features -
or three-level page-tables if you want to use another term for it). 

You'll also need to enable the same feature in Xen itself, as the Xen
hypervisor and the Dom0 needs to match in page-table bitness... 

--
Mats

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> marek cervenka
> Sent: 07 June 2006 15:02
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] xen3.0.2 4G ram
> 
> hi,
> 
> can you someone explain why i have only ~3GB memory available with xen
> 3.0.2 (kernel 2.6.16.16)
> 
> 2339MB HIGHMEM available.
> 831MB LOWMEM available.
> 
> --config--
> # CONFIG_NOHIGHMEM is not set
> CONFIG_HIGHMEM4G=y
> # CONFIG_HIGHMEM64G is not set
> CONFIG_VMSPLIT_3G=y
> # CONFIG_VMSPLIT_3G_OPT is not set
> # CONFIG_VMSPLIT_2G is not set
> # CONFIG_VMSPLIT_1G is not set
> CONFIG_PAGE_OFFSET=0xC0000000
> CONFIG_HIGHMEM=y
> ---cut--
> 
> HW Supermicro 2x xeon 4x1024 ram
> 
> with distro kernel (rhel 2.6.9-34smp) i have full 4GB mem
> 
> thanks
> 
> ---------------------------------------
> Marek Cervenka
> =======================================
> 
> 
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> 
> 


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