| From: Andrew Morton <akpm@linux-foundation.org> |
| Subject: mm-ksm-document-smart-scan-mode-fix |
| Date: Tue Sep 26 05:48:29 PM PDT 2023 |
| |
| document that smart_scan defaults to on |
| |
| Cc: David Hildenbrand <david@redhat.com> |
| Cc: Johannes Weiner <hannes@cmpxchg.org> |
| Cc: Rik van Riel <riel@surriel.com> |
| Cc: Stefan Roesch <shr@devkernel.io> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| --- |
| |
| Documentation/admin-guide/mm/ksm.rst | 6 +++--- |
| 1 file changed, 3 insertions(+), 3 deletions(-) |
| |
| --- a/Documentation/admin-guide/mm/ksm.rst~mm-ksm-document-smart-scan-mode-fix-2 |
| +++ a/Documentation/admin-guide/mm/ksm.rst |
| @@ -156,12 +156,12 @@ stable_node_chains_prune_millisecs |
| ``max_page_sharing`` yet. |
| |
| smart_scan |
| - By default KSM checks every candidate page for each scan. It does |
| - not take into account historic information. When smart scan is |
| + Historically KSM checked every candidate page for each scan. It did |
| + not take into account historic information. When smart scan is |
| enabled, pages that have previously not been de-duplicated get |
| skipped. How often these pages are skipped depends on how often |
| de-duplication has already been tried and failed. By default this |
| - optimization is disabled. The ``pages_skipped`` metric shows how |
| + optimization is enabled. The ``pages_skipped`` metric shows how |
| effective the setting is. |
| |
| The effectiveness of KSM and MADV_MERGEABLE is shown in ``/sys/kernel/mm/ksm/``: |
| _ |
