diff options
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index 581dfaad9257..ce6a58f3b21f 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -560,6 +560,18 @@ void folio_migrate_flags(struct folio *newfolio, struct folio *folio) * future migrations of this same page. */ cpupid = page_cpupid_xchg_last(&folio->page, -1); + /* + * For memory tiering mode, when migrate between slow and fast + * memory node, reset cpupid, because that is used to record + * page access time in slow memory node. + */ + if (sysctl_numa_balancing_mode & NUMA_BALANCING_MEMORY_TIERING) { + bool f_toptier = node_is_toptier(page_to_nid(&folio->page)); + bool t_toptier = node_is_toptier(page_to_nid(&newfolio->page)); + + if (f_toptier != t_toptier) + cpupid = -1; + } page_cpupid_xchg_last(&newfolio->page, cpupid); folio_migrate_ksm(newfolio, folio); |