Re: [Xen-users] Memory not seen in Dom0

[Steve Thompson <smt@xxxxxxxxxxxx>]

On Sat, 7 Nov 2009, maillists0@xxxxxxxxx wrote:

> I have a machine with 64G of ram. Running CentOS 5.4 with kernel 2.6.18-164,
> I only see 32G in /proc/meminfo. All 64G show up for the stock kernel. There
> are no vm's running.
>
> I'm new to xen, so my first question is: is this normal? If not, anyone know
> what the issue might be? Any help or pointers to a doc is appreciated.
Yes, this is normal, or rather it is a limitation of the xen kernel. Note 
that it probably is not a real issue in practice, as any VM's that you 
create will come from the "missing" 32GB, only overflowing into the "real" 
32GB when the first 32GB is used. I have a similar system with 48GB 
physical memory, and with 26 guests, each having 1 GB, the amount of 
memory shown in Dom0 is around 22GB.
Steve

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