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? Cheers, Sebastian