Hello All I have an Intel Xeon server with 32G memory. My setup is xen-3.2.2 with 32-bit CentOS 5.1 dom0 with a 64-bit hypervisor. Initial state... #xm info <snip> release : 2.6.18.8-xen0 version : #1 Thu Jun 18 14:06:08 PDT 2009 machine : i686 nr_cpus : 8 nr_nodes : 1 cores_per_socket : 4 threads_per_core : 1 cpu_mhz : 1861 hw_caps : bfebfbff:20100800:00000000:00000140:0004e3bd:00000000:00000001 total_memory : 32766 free_memory : 31298 node_to_cpu : node0:0-7 xen_major : 3 xen_minor : 2 xen_extra : .2-rc3-pre xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 xen_scheduler : credit xen_pagesize : 4096 platform_params : virt_start=0xfdc00000 </snip> #xm list Name ID Mem VCPUs State Time(s) Domain-0 0 512 1 r----- 25216.9 controller 1 512 1 r----- 39912.5 After I create a Windows 2003 Server VM with 30G RAM... #xm info <snip> total_memory : 32766 free_memory : 337 </snip> #xm list Name ID Mem VCPUs State Time(s) Domain-0 0 512 1 r----- 25251.4 controller 1 512 1 -b---- 39948.6 vm.windows03 44 30720 1 r----- 22.0 As you can see, the free_memory shown is 337M which is a good 241M less than what it should have been (31298M - 30720M = 578M) after the Windows VM was created. My question here is where/why does xen use that extra 241M. Any pointers much appreciated. TIA! -- Apoorva Kulkarni 3Tera, Inc. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users