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Bug#645052: kernel only recognizes 32G of memory



On Wed, 2011-10-12 at 08:46 +0300, Dmitry Musatov wrote:
>  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 Amazon EC2 instances only report this amount of
> memory.
>  Please set this limit to 70GB as there is a known restriction for
> t1.micro instances at about 80GB.
>  Similar bug exists and Ubuntu where it's already fixed
> (https://bugs.launchpad.net/ubuntu/+source/linux-ec2/+bug/667796)

Is this the sort of change we can consider making in a stable update?
I'm not at all sure, although my gut feeling is that it would be safe.

The 3.0 kernels in unstable (and testing?) right now have
XEN_MAX_DOMAIN_MEMORY=128, I think they use a more dynamic scheme for
this limit than the 2.6.32 kernels did too.

Ian.

-- 
Ian Campbell


Captain Penny's Law:
	You can fool all of the people some of the
	time, and some of the people all of the
	time, but you can't fool mom.

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