PUBLIC MARKS with tags mem & xen

If you get this "4gb seg fixup" message on tty and/or in your /var/log/messages after the reboot to the Xen Hypervisor on Etch, you should check if you installed libc6-xen on your system. If not, install it, and reboot the system again.

If you have a server with more than 4GB RAM and want to install a 32bit Debian Etch on it (following this tutorial: Debian Etch And Xen From The Debian Repository), you'd expect the Xen-PAE kernel to see all your RAM because the Xen-PAE kernel supports up to 64GB RAM. In fact, it recognizes only about 3.3GB RAM due to a bug in the GRUB bootloader. This article explains how you can fix GRUB so that all your RAM gets recognized. I do not issue any guarantee that this will work for you!