On 11.08.23 21:36, Stefan Roesch wrote:
ksm currently maintains several statistics, which let you determine how
successful KSM is at sharing pages. However it does not contain a metric
to determine how much work it does.
This commit adds the pages scanned metric. This allows the administrator
to determine how many pages have been scanned over a period of time.
Signed-off-by: Stefan Roesch <shr@xxxxxxxxxxxx>
---
Documentation/admin-guide/mm/ksm.rst | 2 ++
mm/ksm.c | 16 +++++++++++++++-
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/Documentation/admin-guide/mm/ksm.rst b/Documentation/admin-guide/mm/ksm.rst
index 5c5be7bd84b8..776f244bdae4 100644
--- a/Documentation/admin-guide/mm/ksm.rst
+++ b/Documentation/admin-guide/mm/ksm.rst
@@ -159,6 +159,8 @@ The effectiveness of KSM and MADV_MERGEABLE is shown in ``/sys/kernel/mm/ksm/``:
general_profit
how effective is KSM. The calculation is explained below.
+pages_scanned
+ how many pages are being scanned for ksm
pages_shared
how many shared pages are being used
pages_sharing
diff --git a/mm/ksm.c b/mm/ksm.c
index 6b7b8928fb96..8d6aee05421d 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -242,6 +242,9 @@ static struct kmem_cache *rmap_item_cache;
static struct kmem_cache *stable_node_cache;
static struct kmem_cache *mm_slot_cache;
+/* The number of pages scanned */
+static unsigned long ksm_pages_scanned;
+
LGTM
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
--
Cheers,
David / dhildenb
