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xen-users
RE: [Xen-users] 16GB limit for PAE?
I have a server with 16 GB memory..! Read the warning that is your
answer.!
(XEN) Command line: /xen-3.0-unstable.gz com1=115200,8n1
(XEN) WARNING: Only the first 16 GB of the physical memory map can be
accessed
(XEN) by Xen in 32-bit mode. Truncating the memory map...
(XEN) Physical RAM map:
(XEN) 0000000000000000 - 000000000009f400 (usable)
(XEN) 000000000009f400 - 00000000000a0000 (reserved)
(XEN) 00000000000f0000 - 0000000000100000 (reserved)
(XEN) 0000000000100000 - 00000000dfff3000 (usable)
(XEN) 00000000dfff3000 - 00000000dfffb000 (ACPI data)
(XEN) 00000000dfffb000 - 00000000e0000000 (reserved)
(XEN) 00000000fec00000 - 00000000fed00000 (reserved)
(XEN) 00000000fee00000 - 00000000fee10000 (reserved)
(XEN) 00000000ffc00000 - 0000000100000000 (reserved)
(XEN) 0000000100000000 - 0000000400000000 (usable)
(XEN) System RAM: 15871MB (16252488kB)
(XEN) Xen heap: 9MB (9908kB)
(XEN) PAE enabled, limit: 16 GB
-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Yura
Pismerov
Sent: Wednesday, October 04, 2006 7:28 PM
To: Shepherd, Darren S
Cc: Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] 16GB limit for PAE?
Shepherd, Darren S wrote:
> When I boot Xen I see a message saying PAE enabled, limit 16GB. Does
> this mean that I can't exceed 16GB with PAE. I'm just about to
> purchase a machine 32GB of memory and I don't wish to go to x86_64.
> Will I have a problem?
>
>
>From my own experience, yes, it is the limitation of 32bit Xen kernels.
You better try to find 64bit kernel binary (Xen patched of course) for
your platform. I believe the 64bit kernels are available in Xen binary
packages. The only question whether your hardware will like it
(hopefully it will, but you never know). Otherwise, if you want to build
64bit kernel yourself on existing 32bit userspace, you will have to take
some additional steps (which I believe are not very straight forward).
Ideally you should try to re-deploy your system from scratch using 64bit
distro.
> Darren
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
>
--
Yuri Pismerov, System Administrator
Armor Technologies (Canada) Inc.
P: 905 305 1946 (x.3519)
http://www.armorware.net
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