On Friday, June 17, 2011 10:54:45 AM you wrote: > This seems to me a little bit weird. I am myself using KVM, but with > less than 32 GB on the host, and I am not aware that the system itself > (the host) becomes the first VM. I think it is doubtful, perhaps it > would stand better for Xen ?
http://serverfault.com/questions/46600/rhel5-xen-dom0-max-memory KVM and Virtualization are both groups; installing the Virtualization group pulls in kernel-xen; this means you get a DomO instead of the kernel on bare metal, and you hit the DomO configured limit. On a CentOS 5.6 box I have here: # yum groupinstall Virtualization ..... Setting up Group Process Checking for new repos for mirrors Resolving Dependencies --> Running transaction check ---> Package gnome-applet-vm.i386 0:0.1.2-1.el5 set to be updated --> Processing Dependency: libxenstore.so.3.0 for package: gnome-applet-vm ---> Package kernel-xen.i686 0:2.6.18-238.12.1.el5 set to be installed .... Dependencies Resolved .... Installing: gnome-applet-vm i386 0.1.2-1.el5 base 76 k kernel-xen i686 2.6.18-238.12.1.el5 updates 18 M libvirt i386 0.8.2-15.el5_6.4 updates 3.0 M virt-manager i386 0.6.1-13.el5.centos updates 1.6 M virt-viewer i386 0.0.2-3.el5 base 25 k xen i386 3.0.3-120.el5_6.2 updates 1.9 M Installing for dependencies: bridge-utils i386 1.1-2 base 27 k e4fsprogs-libs i386 1.41.12-2.el5 base 108 k gnome-python2-gnomekeyring i386 2.16.0-3.el5 base 16 k gtk-vnc i386 0.3.8-3.el5 base 80 k gtk-vnc-python i386 0.3.8-3.el5 base 12 k libvirt-python i386 0.8.2-15.el5_6.4 updates 234 k python-virtinst noarch 0.400.3-11.el5 base 380 k xen-libs i386 3.0.3-120.el5_6.2 updates 167 k xz-libs i386 4.999.9-0.3.beta.20091007git.el5 base 100 k