[CentOS-virt] domU doesn't see all memory

Thu Jan 24 15:15:18 UTC 2013
sg at cyon.ch <sg at cyon.ch>

Updated HV and guest to CentOS 5.9 and 6.3.
HV: 2.6.18-348.1.1.el5xen
Guest: 2.6.32-279.19.1.el6.x86_64

But still memory missing, free -m: 781


Am 02.01.2013 13:02, schrieb Nico Kadel-Garcia:
> On Wed, Jan 2, 2013 at 3:29 AM,  <sg at cyon.ch> wrote:
>> Hi,
>>
>> I'm running CentOS 6.2 x86_64 as xen guest on a CentOS 5.7 dom0.
>> The host is running 2.6.18-274.7.1.el5xen, the guest
>> 2.6.32-220.2.1.el6.x86_64.
>>
>> Memory for domU is set to 1024 MB and "xm list" shows these 1024 MB.
>> But "free -m" on the guest system shows only 652 MB.
>> When I set up a CentOS 5.x guest with 1024 MB "free -m" shoes 1024 
>> MB.
>>
>> Anyone else seeing this? Any ideas on how to fix it?
>
> Start out by doing all the updates to both the Hyperviisor and the
> guest. There have been ongoing improvements to kernels, and to
> libvirt, and ongoing security updates for numerous packages. You
> should realy be at CentOS 6.3 and CentOS5.8, respectively: CentOS 6.2
> and CentOS 5.7 aren't even available on the main download mirrors,
> anymore.
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