On Tue, Jul 17, 2007 at 05:32:11AM -0400, thewird wrote: > I installed FC6 and FC7 and the limit exists on both even though FC7 > was supposed to be using a 64bit hypervisor which supports 32bit guests > (which isn't the case). After various linux installs (including CentOS) > and different configs (even replacing the hypervisor with its 64bit > counterpart) I wasn't able to get a system showing all 28GB of ram AND > work with 32bit guests. > > Out of desperation I bought "Virtualization with Xen" on Amazon for > more insight. Although the book isn't too helpful since at least half > of it if not more, is advertising the commercial XenSource (why would I > buy an expensive Xen book if I wanted to use the newb commercial > software?) I was able to figure out how to install the latest version > of Xen 3.1 from source. I got it to boot perfectly and was expecting to > see all of my 28GB of ram when I ran top but to my dismay it only > showed 16GB once again... What architecture did you compile with Xen 3.1 ? Because of the tricks Xen does on i386, even if you have PAE enabled you stil won't see more than 16 GB of RAM. I believe you need 64-bit HV to see all. You may or may not also need a 64-bit Dom0 - I don't know for sure since I'm not lucky enough to have more than 16 GB of RAM :-( > Can someone please help me and tell me what am I doing wrong. Or am I > going about this the wrong way? Basically I want to see all of my 28GB > of ram and run 32bit guests. I read everywhere this can be done but it > never works. Thank you to anyone who can help me solve this. If money > is the problem, please say so and that can be arranged. We're working on a kernl update for Fedora that will hopefully make it possible to really run 32-bit guests on 64-bit hypervisor. If you did a compile from upstream Xen 3.1 kenrel this should be working for you already though. Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=| -- Fedora-xen mailing list Fedora-xen@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-xen
