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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: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
This commit is contained in:
Andrea Arcangeli 2012-03-23 20:56:34 +01:00 committed by Mel Gorman
parent 9532fec118
commit 8177a420ed
2 changed files with 18 additions and 0 deletions
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13
include/linux/mmzone.h
View File

@ -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)

5
mm/page_alloc.c
View File

@ -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);