Comments on How To Make Your Xen-PAE Kernel Work With More Than 4GB RAM (Debian Etch With GRUB)
How To Make Your Xen-PAE Kernel Work With More Than 4GB RAM (Debian Etch With GRUB) 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.
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Thanks for the help. I had the same problem on my amd64 system and this fixed it for me. I still get different RAM totals if I use a non-xen amd64 kernel, but now the difference is only a couple of megabytes.