[PATCH 32/49] mm: numa: Structures for Migrate On Fault per NUMA migration rate limiting
From: Mel Gorman <mgorman@suse.de>
Date: 2012-12-07 10:24:56
Also in:
lkml
Subsystem:
memory management, memory management - core, memory management - mglru (multi-gen lru), memory management - page allocator, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Vlastimil Babka, Linus Torvalds
From: Andrea Arcangeli <redacted> 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 <redacted> Signed-off-by: Mel Gorman <mgorman@suse.de> --- 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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