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

Wed Jan 2 08:29:18 UTC 2013
sg at cyon.ch <sg at cyon.ch>


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 

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?