Hi all,
At present, the split counters in THP statistics no longer include
PTE-mapped mTHP. Therefore, we want to introduce per-order mTHP split
counters to monitor the frequency of mTHP splits. This will assist
developers in better analyzing and optimizing system performance.
/sys/kernel/mm/transparent_hugepage/hugepages-<size>/stats
split
split_failed
split_deferred
---
Changes since v2 [2]
====================
- mm: add per-order mTHP split counters
- Pick AB from Barry - thanks!
- Pick RB from Baolin - thanks!
- Pick RB from Ryan - thanks!
- Make things more readable (per Barry and Baolin)
- mm: add docs for per-order mTHP split counters
- Pick RB from Barry - thanks!
- Improve the doc as suggested by Ryan
- Remove the outdated note (per Ryan)
Changes since v1 [1]
====================
- mm: add per-order mTHP split counters
- Update the changelog
- Drop '_page' from mTHP split counter names (per David and Ryan)
- Store the order of the folio in a variable and reuse it later
(per Bang)
- mm: add docs for per-order mTHP split counters
- Improve the doc as suggested by Ryan
[1] https://lore.kernel.org/linux-mm/20240424135148.30422-1-ioworker0@xxxxxxxxx
[2] https://lore.kernel.org/linux-mm/20240628130750.73097-1-ioworker0@xxxxxxxxx
Lance Yang (2):
mm: add per-order mTHP split counters
mm: add docs for per-order mTHP split counters
Documentation/admin-guide/mm/transhuge.rst | 20 ++++++++++++++++----
include/linux/huge_mm.h | 3 +++
mm/huge_memory.c | 12 ++++++++++--
3 files changed, 29 insertions(+), 6 deletions(-)
base-commit: ec34ecf3924f09a694e5c7d8d7e785b82f67f9f0
--
2.45.2
