diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 7be1ce8b6be0..36384baa74e1 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2355,6 +2355,37 @@ int split_free_page(struct page *page) } /* + * Update NUMA hit/miss statistics + * + * Must be called with interrupts disabled. + * + * When __GFP_OTHER_NODE is set assume the node of the preferred + * zone is the local node. This is useful for daemons who allocate + * memory on behalf of other processes. + */ +static inline void zone_statistics(struct zone *preferred_zone, struct zone *z, + gfp_t flags) +{ +#ifdef CONFIG_NUMA + int local_nid = numa_node_id(); + enum zone_stat_item local_stat = NUMA_LOCAL; + + if (unlikely(flags & __GFP_OTHER_NODE)) { + local_stat = NUMA_OTHER; + local_nid = preferred_zone->node; + } + + if (z->node == local_nid) { + __inc_zone_state(z, NUMA_HIT); + __inc_zone_state(z, local_stat); + } else { + __inc_zone_state(z, NUMA_MISS); + __inc_zone_state(preferred_zone, NUMA_FOREIGN); + } +#endif +} + +/* * Allocate a page from the given zone. Use pcplists for order-0 allocations. */ static inline |