docs: cgroup: Explain reclaim protection target

The protection target is necessary to understand how effective reclaim
protection applies in the hierarchy.

Signed-off-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Michal Koutný 2025-11-14 19:21:25 +01:00 • committed by Tejun Heo
commit e27179958c