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

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Message-Id: <20240508-b4-ksm-counters-v1-0-e2a9b13f70c5@linux.dev>
Date: Wed, 08 May 2024 17:55:37 +0800
From: Chengming Zhou <chengming.zhou@...ux.dev>
To: Andrew Morton <akpm@...ux-foundation.org>, 
 David Hildenbrand <david@...hat.com>, Stefan Roesch <shr@...kernel.io>, 
 xu xin <xu.xin16@....com.cn>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, 
 zhouchengming@...edance.com, Chengming Zhou <chengming.zhou@...ux.dev>
Subject: [PATCH 0/4] mm/ksm: fix some accounting problems

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@...ux.dev>
---
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@...ux.dev>