Re: [Xen-users] RHEL 5.2 Xen Kernel doesn't detect all amount ofphysical memory

[Juan Pablo Rojas Jiménez <jprojas@xxxxxxxxxxxxxxx>]

Hi,

as far as i know, memory limits come from the compilation time options 
in the kernel...
I guess that 2.6 kernels, in order to 'view' more than 4Gb of memory, 
need to have CONFIG_HIGHMEM64G=y  enabled, so i would say that they can 
see at least 64Gb :)
Hope this helps,

Juan Pablo

Robert Dunkley escribió:
> >From what I have read the XenServer distribution can support up to 32GB
> RAM per VM and 128GB for the whole system. 
>
> My guess is that unless a deliberate restriction is put in place the
> limits RAM for RHEL5 Xen kernel then 256Gb RAM in total and 32Gb RAM per
> VM is probably the max. 
>
> Anyone know for sure?
>
> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Ido Levy
> Sent: 28 August 2008 09:54
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] RHEL 5.2 Xen Kernel doesn't detect all amount
> ofphysical memory
>
>
> Hello All,
>
> Does anyone know what is the current status of RHEL 5.2 x86_64 with
> respect
> to the maximum amount of RAM detected by the Xen 64 bit kernel
> (the one that shipped with Red Hat distribution )
>
> In the following link
> https://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/en-US/RHEL5
> 10/Virtualization_Guide/ch-virt-hw-support.html
> it states that 32GB of RAM is the maximum amount of physical memory the
> Xen
> kernel can detect. Is it still the updated status ?
>
> Is there a work around or any other way to overcome this limit ?
>
> Any info would be appreciated
>
> Thanks,
>
> Ido
>
>
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