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I have a IBM System x3600 series server with UEFI. I managed to compile the xen EFI (xen-4.2-unstable.efi). The machine is currently running Ubuntu with grub2. I can see a grubx64.efi in /boot/efi/EFI/ubuntu/grubx64.efi Where should I put the xen efi ? I tried creating a efi/EFI/xen/xen-4.2-unstable.efi and added it as a boot option using efibootmgr. All I get in that case is a blank screen. I

We found machines with >32 E820 memory map entries, where Xen fails to boot (but Linux does boot fine). The native Linux (both x86 and x86_86) already has: #define E820MAX 128 /* number of entries in E820MAP */ Signed-off-by: Jun Nakajima <jun.nakajima@intel.com> Jun --- Intel Open Source Technology Center -- diff -r 3bb1857981e6 -r 51e9c0c806b2 xen/include/asm-x86/e820.h ---