On Tue, Jan 7, 2020 at 5:27 am, Mark Otaris <mark(a)net-c.com> wrote:
Try it. With a memory limit,
podman run --rm -it --memory=1G fedora bash -c 'dnf install -y
stress-ng && stress-ng --malloc 100 --memcpy 100 --mmap 100 --vm 100'
will use CPU but keep your system responsive. Without the memory limit
(this will hang your system),
podman run --rm -it fedora bash -c 'dnf install -y stress-ng &&
stress-ng --malloc 100 --memcpy 100 --mmap 100 --vm 100'
the system hangs and doesn’t recover after 15 minutes.
I don't think we can use this, though; or at least, I don't see how.
systemd allows limiting the memory accessible to a scope, but it
doesn't allow carving out memory for one particular scope that is not
to be accessible to other scopes. So I don't see a way to use these
memory limits to ensure sufficient memory remains available to critical
session processes. (Am I missing something?)