Done similar to proc_dostring/dointvec_immutable, it is for docker
as it wants to write these non virtualized sysctl and fails as these
one is readonly in CT, docker does it to fix problems with docker
container stop. We can just enable these sysctl on host for docker.
Sysctl may_detach_mounts is
vfs_cache_min_ratio is a sysctl ported from PSBM-6. It supposed
to increase performance, but it was noticed to do the opposite
https://jira.sw.ru/browse/PSBM-68644.
It supposed to protect slabs from reclaiming if their percentage is lower
than the sysctl value (2% by default).
However, it's not qu