[Mavrick] SRU: Set maximum of domain visible memory to 70G

Stefan Bader stefan.bader at canonical.com
Fri Dec 10 14:10:49 GMT 2010

SRU justification:

Impact: The config option XEN_MAX_DOMAIN_MEMORY controls how much memory
a Xen instance is seeing. The default for 64bit is 32GB, which is the
reason that m2.4xlarge instances only report this amount of memory.

Fix: Setting this limit to 70GB as there is a known restriction for
t1.micro instances at about 80GB.

Testcase: Booted m2.4xlarge with this set to 32GB shows 32GB of memory,
when set to 70GB, it correctly reports 68GB. Booted a t1.micro as well
to verify this has not caused problems there.

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