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migrate_pages(): fix failure counting for retry

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After 10 retries, we will give up and the remaining pages will be counted
as failure in nr_failed and nr_thp_failed.  We should count the failure in
nr_failed_pages too.  This is done in this patch.

Link: https://lkml.kernel.org/r/20220817081408.513338-8-ying.huang@intel.com
Fixes: 5984fabb6e ("mm: move_pages: report the number of non-attempted pages")
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Huang Ying 2022-08-17 16:14:07 +08:00 committed by Andrew Morton
parent e6fa8a79fe
commit 077309bc1e
1 changed files with 5 additions and 1 deletions
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6
mm/migrate.c
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@ -1413,6 +1413,7 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page,
int thp_retry = 1;
int nr_failed = 0;
int nr_failed_pages = 0;
int nr_retry_pages = 0;
int nr_succeeded = 0;
int nr_thp_succeeded = 0;
int nr_thp_failed = 0;
@ -1433,6 +1434,7 @@ thp_subpage_migration:
for (pass = 0; pass < 10 && (retry || thp_retry); pass++) {
retry = 0;
thp_retry = 0;
nr_retry_pages = 0;
list_for_each_entry_safe(page, page2, from, lru) {
/*
@ -1506,7 +1508,7 @@ thp_subpage_migration:
nr_failed++;
}
nr_failed_pages += nr_subpages;
nr_failed_pages += nr_subpages + nr_retry_pages;
/*
* There might be some subpages of fail-to-migrate THPs
* left in thp_split_pages list. Move them back to migration
@ -1522,6 +1524,7 @@ thp_subpage_migration:
thp_retry++;
else
retry++;
nr_retry_pages += nr_subpages;
break;
case MIGRATEPAGE_SUCCESS:
nr_succeeded += nr_subpages;
@ -1548,6 +1551,7 @@ thp_subpage_migration:
if (!no_subpage_counting)
nr_failed += retry;
nr_thp_failed += thp_retry;
nr_failed_pages += nr_retry_pages;
/*
* Try to migrate subpages of fail-to-migrate THPs, no nr_failed
* counting in this round, since all subpages of a THP is counted