Memmap accounting provides us with observability of how much memory is
used for per-page metadata: i.e. "struct page"'s and "struct page_ext".
It also provides with information of how much was allocated using
boot allocator (i.e. not part of MemTotal), and how much was allocated
using buddy allocated (i.e. part of MemTotal).

This small series fixes a few problems that were discovered with the
original patch.

Changes:
	- Added patch "mm: add system wide stats items category"
	- Changed from using system-wide events to system-wide stats
v2:
https://lore.kernel.org/lkml/20240807211929.3433304-1-pasha.tatashin@soleen.com

Pasha Tatashin (4):
  mm: update the memmap stat before page is freed
  mm: don't account memmap on failure
  mm: add system wide stats items category
  mm: don't account memmap per-node

 include/linux/mmzone.h |  2 --
 include/linux/vmstat.h | 22 +++++++-----------
 mm/hugetlb_vmemmap.c   | 13 +++++------
 mm/mm_init.c           |  3 +--
 mm/page_alloc.c        |  1 -
 mm/page_ext.c          | 15 +++++--------
 mm/sparse-vmemmap.c    | 11 ++++-----
 mm/sparse.c            |  5 ++---
 mm/vmstat.c            | 51 ++++++++++++++++++++----------------------
 9 files changed, 49 insertions(+), 74 deletions(-)

-- 
2.46.0.76.ge559c4bf1a-goog