[PATCH 0/4] mm/ksm: fix some accounting problems

[Chengming Zhou]

We encounter some abnormal ksm_pages_scanned and ksm_zero_pages during
some random tests.

1. ksm_pages_scanned unchanged even ksmd scanning has progress.
2. ksm_zero_pages maybe -1 in some rare cases.

The first two patches fix these problems and the last two patches are
minor optimizations about ksm_stable_node and general_profit calculation.

Thanks for review and comments!

Signed-off-by: Chengming Zhou <chengming.zhou@xxxxxxxxx>
---
Chengming Zhou (4):
      mm/ksm: fix ksm_pages_scanned accounting
      mm/ksm: fix ksm_zero_pages accounting
      mm/ksm: union hlist_node with list_head in struct ksm_stable_node
      mm/ksm: calculate general_profit more accurately

 fs/proc/base.c           |  2 +-
 include/linux/ksm.h      | 22 +++++++++++++++++++---
 include/linux/mm_types.h |  2 +-
 mm/ksm.c                 | 33 ++++++++++++++++++++-------------
 4 files changed, 41 insertions(+), 18 deletions(-)
---
base-commit: fb0f40125feec3de7ef4524600ac83946207117e
change-id: 20240508-b4-ksm-counters-04817b40d3ee

Best regards,
-- 
Chengming Zhou <chengming.zhou@xxxxxxxxx>