Comment 7 for bug 1397880

This is implemented in v4.6:
e7ee3e8 perf/x86/mbm: Add support for MBM counter overflow handling
2d4de83 perf/x86/mbm: Implement RMID recycling
87f01cc perf/x86/mbm: Add memory bandwidth monitoring event management
33c3cc7 perf/x86/mbm: Add Intel Memory B/W Monitoring enumeration and init
ada2f63 perf/x86/cqm: Fix CQM memory leak and notifier leak
a223c1c perf/x86/cqm: Fix CQM handling of grouping events into a cache_group