Ceph

if make check runs out of resources, it will fail miserably and in mysterious ways. There will be many left over process that are painful to kill. Although this can be avoided by running make check in a container, not everyone has docker installed and simply running ./run-make-check.sh will likely overflows the ulimits for machines with > 8 processors.

The resource check must be conservative because it is easier to deal with a make check run that is slower than it should be rather than a failed make check because of resources starvation.