The patch titled
Subject: migrate_pages(): fix failure counting for THP subpages retrying
has been added to the -mm mm-unstable branch. Its filename is
migrate_pages-fix-failure-counting-for-thp-subpages-retrying.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/migrate_pages-fix-failure-counting-for-thp-subpages-retrying.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Huang Ying <ying.huang@xxxxxxxxx>
Subject: migrate_pages(): fix failure counting for THP subpages retrying
Date: Wed, 17 Aug 2022 16:14:04 +0800
If THP is failed to be migrated for -ENOSYS and -ENOMEM, the THP will be
split into thp_split_pages, and after other pages are migrated, pages in
thp_split_pages will be migrated with no_subpage_counting == true, because
its failure have been counted already. If some pages in thp_split_pages
are retried during migration, we should not count their failure if
no_subpage_counting == true too. This is done this patch to fix the
failure counting for THP subpages retrying.
Link: https://lkml.kernel.org/r/20220817081408.513338-5-ying.huang@xxxxxxxxx
Fixes: 5984fabb6e82 ("mm: move_pages: report the number of non-attempted pages")
Signed-off-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/mm/migrate.c~migrate_pages-fix-failure-counting-for-thp-subpages-retrying
+++ a/mm/migrate.c
@@ -1545,7 +1545,8 @@ retry:
}
}
}
- nr_failed += retry;
+ if (!no_subpage_counting)
+ nr_failed += retry;
nr_thp_failed += thp_retry;
/*
* Try to migrate subpages of fail-to-migrate THPs, no nr_failed
_
Patches currently in -mm which might be from ying.huang@xxxxxxxxx are
memory-tiering-hot-page-selection-with-hint-page-fault-latency.patch
memory-tiering-rate-limit-numa-migration-throughput.patch
memory-tiering-adjust-hot-threshold-automatically.patch
migrate-fix-syscall-move_pages-return-value-for-failure.patch
migrate_pages-remove-unnecessary-list_safe_reset_next.patch
migrate_pages-fix-thp-failure-counting-for-enomem.patch
migrate_pages-fix-failure-counting-for-thp-subpages-retrying.patch
migrate_pages-fix-failure-counting-for-thp-on-enosys.patch
migrate_pages-fix-failure-counting-for-thp-splitting.patch
migrate_pages-fix-failure-counting-for-retry.patch
