diff options
| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2023-09-13 17:51:25 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-04 10:32:27 -0700 |
| commit | 728be28fae8c838d52c91dce4867133798146357 (patch) | |
| tree | 791f374166be26426d60a06240d355657bf557f1 /mm/migrate.c | |
| parent | a8ac4a767dcd9d87d8229045904d9fe15ea5e0e8 (diff) | |
mm: migrate: remove THP mapcount check in numamigrate_isolate_page()
The check of THP mapped by multiple processes was introduced by commit
04fa5d6a6547 ("mm: migrate: check page_count of THP before migrating") and
refactor by commit 340ef3902cf2 ("mm: numa: cleanup flow of transhuge page
migration"), which is out of date, since migrate_misplaced_page() is now
using the standard migrate_pages() for small pages and THPs, the reference
count checking is in folio_migrate_mapping(), so let's remove the special
check for THP.
Link: https://lkml.kernel.org/r/20230913095131.2426871-3-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Suggested-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index d1b8ab5a2417..0030703204d3 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2486,10 +2486,6 @@ static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page) int nr_pages = thp_nr_pages(page); int order = compound_order(page); - /* Do not migrate THP mapped by multiple processes */ - if (PageTransHuge(page) && total_mapcount(page) > 1) - return 0; - /* Avoid migrating to a node that is nearly full */ if (!migrate_balanced_pgdat(pgdat, nr_pages)) { int z; |