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xen-devel
Re: [Xen-devel] more than 16 GB in a 32 Bit dom0
Hi Ian,
From: "Ian Campbell"
On Tue, 2011-02-08 at 10:42 +0000, Daniel Bauer wrote:
From: "Pasi Kärkkäinen"
> On Tue, Feb 08, 2011 at 08:27:02AM +0100, Daniel Bauer wrote:
>> I've read in many posts, that XEN limits the 32 bit PAE kernel to
>> 16
>> GB
>> RAM, but I don't find were to enable more. Starting linux without
>> XEN
>> shows the whole memory. Is there still no solution?
>>
>> I don't have the possibility to upgrade the server to 64 bit.
>>
>
> You can run 64bit hypervisor (xen.gz) with a 32bit PAE dom0 Linux
> kernel.
> Maybe that's an option for you..
if it works, why not! But what are the issues about this solution?
None really.
It's certainly preferable to run a 64 bit hypervisor whenever possible
but running a 32 bit domain 0 is a very reasonable configuration.
It's the default for XCP and XenServer for example and works quite
well
there.
> That allows you to use all the available memory for VMs, and
> dedicate
> some memory (say, 1GB) for a 32bit dom0.
It also allows you to run a mixture of 32 and 64 bit guests.
I just tried it now, but the system doesn't boot. The reason why I can't
upgrade to 64 bit is, that the server is only a 32 bit box (HP ProLiant
DL760 G2, 8 x 3 GHz Xeon, 64 GB RAM). IMHO I need a 64 Bit CPU to run
the 64 bit xen.gz, or?
Thanks
Daniel
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