Re: [libvirt] 1GB huge pages and incompatible VM memory size

On Tue, 21 Feb, at 11:23:52AM, Michal Privoznik wrote:

Jim,

what is the actual problem? I've tried to reproduce this by running vm with 3.5G RAM backed by 1GB huge pages and the guest runs just fine. I mean kvm guest. This is because at the cmd line level there is aligned value:

-m size=4194304k,slots=16,maxmem=8388608k

This is result of qemuDomainAlignMemorySizes(). So perhaps there's a bug somewhere in the function?

Quite possibly. Some memory values work fine and appear to be rounded to the next gigabyte boundary. One KiB values that fails for me is, <memory unit='KiB'>52428801</memory> <currentMemory unit='KiB'>52428801</currentMemory> Which results in qemu-kvm ... -m 51201