Comment 6 for bug 2012763

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Jeff Lane  (bladernr) wrote (last edit ):

Also, I did some digging, we use LXD to kick off KVMs and this exists int he LXD docs:

limits.cpu string - yes - Number or range of CPUs to expose to the instance (defaults to 1 CPU for VMs)

I had hoped that the issue was that kicking off that single VM was somehow going crazy and attaching to every CPU core.

BUT it looks like LXD defaults to 1 CPU for VMs, meaning it's not coming anywhere near close to that limit of 288. If that's the case that means QEMU itself is unsable on these new high-core-count CPUs

We can try to explicitly use limts.cpu with LXD but if that doesn't work, we need some help sorting out exactly what's happening here and how to work around it.