From: Andrea Arcangeli <aarcange@xxxxxxxxxx>
This defines the per-node data used by Migrate On Fault in order to
rate limit the migration. The rate limiting is applied independently
to each destination node.
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
---
include/linux/mmzone.h | 13 +++++++++++++
mm/page_alloc.c | 5 +++++
2 files changed, 18 insertions(+)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index a23923b..1ed16e5 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -717,6 +717,19 @@ typedef struct pglist_data {
struct task_struct *kswapd; /* Protected by lock_memory_hotplug() */
int kswapd_max_order;
enum zone_type classzone_idx;
+#ifdef CONFIG_BALANCE_NUMA
+ /*
+ * Lock serializing the per destination node AutoNUMA memory
+ * migration rate limiting data.
+ */
+ spinlock_t balancenuma_migrate_lock;
+
+ /* Rate limiting time interval */
+ unsigned long balancenuma_migrate_next_window;
+
+ /* Number of pages migrated during the rate limiting time interval */
+ unsigned long balancenuma_migrate_nr_pages;
+#endif
} pg_data_t;
#define node_present_pages(nid) (NODE_DATA(nid)->node_present_pages)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5953dc2..df58654 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4449,6 +4449,11 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat,
int ret;
pgdat_resize_init(pgdat);
+#ifdef CONFIG_BALANCE_NUMA
+ spin_lock_init(&pgdat->balancenuma_migrate_lock);
+ pgdat->balancenuma_migrate_nr_pages = 0;
+ pgdat->balancenuma_migrate_next_window = jiffies;
+#endif
init_waitqueue_head(&pgdat->kswapd_wait);
init_waitqueue_head(&pgdat->pfmemalloc_wait);
pgdat_page_cgroup_init(pgdat);
--
1.7.9.2
--
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