The patch titled
Subject: mm-migrate-correct-the-hugetlb-migration-stats-fix
has been added to the -mm tree. Its filename is
mm-migrate-correct-the-hugetlb-migration-stats-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-migrate-correct-the-hugetlb-migration-stats-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-migrate-correct-the-hugetlb-migration-stats-fix.patch
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------------------------------------------------------
From: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Subject: mm-migrate-correct-the-hugetlb-migration-stats-fix
fix docs, per Mike
Link: https://lkml.kernel.org/r/141bdfc6-f898-3cc3-f692-726c5f6cb74d@xxxxxxxxxxxxxxxxx
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/vm/page_migration.rst | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- a/Documentation/vm/page_migration.rst~mm-migrate-correct-the-hugetlb-migration-stats-fix
+++ a/Documentation/vm/page_migration.rst
@@ -263,15 +263,15 @@ Monitoring Migration
The following events (counters) can be used to monitor page migration.
1. PGMIGRATE_SUCCESS: Normal page migration success. Each count means that a
- page was migrated. If the page was a non-THP page, then this counter is
- increased by one. If the page was a THP, then this counter is increased by
- the number of THP subpages. For example, migration of a single 2MB THP that
- has 4KB-size base pages (subpages) will cause this counter to increase by
- 512.
+ page was migrated. If the page was a non-THP and non-hugetlb page, then
+ this counter is increased by one. If the page was a THP or hugetlb, then
+ this counter is increased by the number of THP or hugetlb subpages.
+ For example, migration of a single 2MB THP that has 4KB-size base pages
+ (subpages) will cause this counter to increase by 512.
2. PGMIGRATE_FAIL: Normal page migration failure. Same counting rules as for
PGMIGRATE_SUCCESS, above: this will be increased by the number of subpages,
- if it was a THP.
+ if it was a THP or hugetlb.
3. THP_MIGRATION_SUCCESS: A THP was migrated without being split.
_
Patches currently in -mm which might be from baolin.wang@xxxxxxxxxxxxxxxxx are
mm-migrate-fix-the-return-value-of-migrate_pages.patch
mm-migrate-correct-the-hugetlb-migration-stats.patch
mm-migrate-correct-the-hugetlb-migration-stats-fix.patch
mm-compaction-fix-the-migration-stats-in-trace_mm_compaction_migratepages.patch
mm-migrate-support-multiple-target-nodes-demotion.patch
mm-migrate-add-more-comments-for-selecting-target-node-randomly.patch
