How to keep executable code in memory even under memory pressure ? in Linux

Question

The goal here is to keep every running process\' executable code in memory during memory pressure, in Linux.
In Linux, I am able to instantly (1 sec) cause high memory p

Answer 1

The memory.min parameter in the cgroups-v2 memory controller should help.

Namely, let me quote:

"Hard memory protection. If the memory usage of a cgroup is within its effective min boundary, the cgroup’s memory won’t be reclaimed under any conditions. If there is no unprotected reclaimable memory available, OOM killer is invoked."

https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html