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[Xen-users] Can't see more than 3.5GB of RAM

Hi Everyone,

I am running Ubuntu 12.04 x86_64. My machine has a supermicro motherboard X9SCI-LN4F with 32GB of RAM installed. To get Xen, I simply did apt-get install xen-hypervisor which gives me Ubuntu's 4.1 xen version.

For some reason, Xen can't see any more than about 3.5GB of RAM. I can confirm this by xentop as well as xm info. I am definately running a 64-bit Dom0 kernel as when I boot into it without Xen, I can see all 32GB of RAM by running "free -m".

Has anybody come across this issue before? For what it's worth, I'm booting my system using UEFI - could that have something to do with it?

Any help is very much appreciated


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