Please provide hard memory limit settings for Spectrum Scale mmfsd process

Due to processing by IBM, this request was reassigned to have the following updated attributes:
Brand - Servers and Systems Software
Product family - IBM Spectrum Scale
Product - Spectrum Scale (formerly known as GPFS) - Public RFEs
Component - Product functionality

For recording keeping, the previous attributes were:
Brand - Servers and Systems Software
Product family - IBM Spectrum Scale
Product - Spectrum Scale (formerly known as GPFS) - Public RFEs
Component - V4 Product functionality

GPFS historically used to operate under self-imposed memory limits, e.g. tokenMemLimit, sharedMemLimit, pagepool. This design ultimately turned out to be counter-productive, as multiple users ran into the internal limits when RAM was in fact available. At the same time, the limits imposed on itself by mmfsd weren't very effective in limiting the actual GPFS memory footprint, because a considerable amount of memory allocation occurs in a kernel, where it's impractical to try to limit. One can still limit mmfsd memory consumption, e.g. using cgroups, but doing so is unsupported and not definitely not recommended. Practically speaking, mmfsd memory footprint can be effectively controlled via configuration settings, primarily pagepool and maxFilesToCache.

Creating a new RFE based on Community RFE #84235 in product Spectrum Scale (formerly known as GPFS) - Public RFEs.