[PATCH v1 0/2] mTHP allocation stats for file-backed memory

[Ryan Roberts <ryan.roberts@arm.com>]

Hi All,

With the mTHP shmem stat names cleaned up [1], we can now introduce real "file_"
stats for file-backed memory. This series does that. The stats are useful to
give visibility into how file-backed memory is being allocated. I'm planning to
build upon this with controls to restrict the folio sizes that can be allocatd
for pagecache (subject to test results that demonstrate the value).

---
This applies on top of today's mm-unstable (46790522e333). All mm selftests have
been run; no regressions were observed.

[1] https://lore.kernel.org/linux-mm/20240710095503.3193901-1-ryan.roberts@arm.com/

Thanks,
Ryan

Ryan Roberts (2):
  mm: Cleanup count_mthp_stat() definition
  mm: mTHP stats for pagecache folio allocations

 Documentation/admin-guide/mm/transhuge.rst |  13 +++
 include/linux/huge_mm.h                    |  76 ++++++-------
 include/linux/pagemap.h                    |  17 ++-
 mm/filemap.c                               |   6 +-
 mm/huge_memory.c                           | 117 ++++++++++++++++-----
 mm/memory.c                                |   2 -
 mm/shmem.c                                 |   6 --
 7 files changed, 163 insertions(+), 74 deletions(-)

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2.43.0