Commit 8177a420 authored by Andrea Arcangeli's avatar Andrea Arcangeli Committed by Mel Gorman
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mm: numa: Structures for Migrate On Fault per NUMA migration rate limiting 



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: default avatarAndrea Arcangeli <aarcange@redhat.com>
Signed-off-by: default avatarMel Gorman <mgorman@suse.de>
parent 9532fec1

include/linux/mmzone.h

+13 −0
Original line number Diff line number Diff line
@@ -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_NUMA_BALANCING

	/*

	 * Lock serializing the per destination node AutoNUMA memory

	 * migration rate limiting data.

	 */

	spinlock_t numabalancing_migrate_lock;



	/* Rate limiting time interval */

	unsigned long numabalancing_migrate_next_window;



	/* Number of pages migrated during the rate limiting time interval */

	unsigned long numabalancing_migrate_nr_pages;

#endif

} pg_data_t;



#define node_present_pages(nid)	(NODE_DATA(nid)->node_present_pages)

mm/page_alloc.c

+5 −0
Original line number Diff line number Diff line
@@ -4449,6 +4449,11 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat, 
	int ret;



	pgdat_resize_init(pgdat);

#ifdef CONFIG_NUMA_BALANCING

	spin_lock_init(&pgdat->numabalancing_migrate_lock);

	pgdat->numabalancing_migrate_nr_pages = 0;

	pgdat->numabalancing_migrate_next_window = jiffies;

#endif

	init_waitqueue_head(&pgdat->kswapd_wait);

	init_waitqueue_head(&pgdat->pfmemalloc_wait);

	pgdat_page_cgroup_init(pgdat);