diff options
| -rw-r--r-- | include/linux/gfp.h | 17 | ||||
| -rw-r--r-- | include/linux/mmzone.h | 14 | ||||
| -rw-r--r-- | mm/page_alloc.c | 28 |
3 files changed, 48 insertions, 11 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h index bc68dd9a6d41..12a90a191c11 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -98,22 +98,29 @@ struct vm_area_struct; static inline enum zone_type gfp_zone(gfp_t flags) { + int base = 0; + +#ifdef CONFIG_NUMA + if (flags & __GFP_THISNODE) + base = MAX_NR_ZONES; +#endif + #ifdef CONFIG_ZONE_DMA if (flags & __GFP_DMA) - return ZONE_DMA; + return base + ZONE_DMA; #endif #ifdef CONFIG_ZONE_DMA32 if (flags & __GFP_DMA32) - return ZONE_DMA32; + return base + ZONE_DMA32; #endif if ((flags & (__GFP_HIGHMEM | __GFP_MOVABLE)) == (__GFP_HIGHMEM | __GFP_MOVABLE)) - return ZONE_MOVABLE; + return base + ZONE_MOVABLE; #ifdef CONFIG_HIGHMEM if (flags & __GFP_HIGHMEM) - return ZONE_HIGHMEM; + return base + ZONE_HIGHMEM; #endif - return ZONE_NORMAL; + return base + ZONE_NORMAL; } /* diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index f21e5951038b..f6167f2fd7fb 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -324,6 +324,17 @@ struct zone { #define MAX_ZONES_PER_ZONELIST (MAX_NUMNODES * MAX_NR_ZONES) #ifdef CONFIG_NUMA + +/* + * The NUMA zonelists are doubled becausse we need zonelists that restrict the + * allocations to a single node for GFP_THISNODE. + * + * [0 .. MAX_NR_ZONES -1] : Zonelists with fallback + * [MAZ_NR_ZONES ... MAZ_ZONELISTS -1] : No fallback (GFP_THISNODE) + */ +#define MAX_ZONELISTS (2 * MAX_NR_ZONES) + + /* * We cache key information from each zonelist for smaller cache * footprint when scanning for free pages in get_page_from_freelist(). @@ -389,6 +400,7 @@ struct zonelist_cache { unsigned long last_full_zap; /* when last zap'd (jiffies) */ }; #else +#define MAX_ZONELISTS MAX_NR_ZONES struct zonelist_cache; #endif @@ -455,7 +467,7 @@ extern struct page *mem_map; struct bootmem_data; typedef struct pglist_data { struct zone node_zones[MAX_NR_ZONES]; - struct zonelist node_zonelists[MAX_NR_ZONES]; + struct zonelist node_zonelists[MAX_ZONELISTS]; int nr_zones; #ifdef CONFIG_FLAT_NODE_MEM_MAP struct page *node_mem_map; diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d06f6e0f75aa..2f547f45de18 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1191,9 +1191,6 @@ zonelist_scan: !zlc_zone_worth_trying(zonelist, z, allowednodes)) continue; zone = *z; - if (unlikely(NUMA_BUILD && (gfp_mask & __GFP_THISNODE) && - zone->zone_pgdat != zonelist->zones[0]->zone_pgdat)) - break; if ((alloc_flags & ALLOC_CPUSET) && !cpuset_zone_allowed_softwall(zone, gfp_mask)) goto try_next_zone; @@ -1262,7 +1259,10 @@ restart: z = zonelist->zones; /* the list of zones suitable for gfp_mask */ if (unlikely(*z == NULL)) { - /* Should this ever happen?? */ + /* + * Happens if we have an empty zonelist as a result of + * GFP_THISNODE being used on a memoryless node + */ return NULL; } @@ -1858,6 +1858,22 @@ static void build_zonelists_in_node_order(pg_data_t *pgdat, int node) } /* + * Build gfp_thisnode zonelists + */ +static void build_thisnode_zonelists(pg_data_t *pgdat) +{ + enum zone_type i; + int j; + struct zonelist *zonelist; + + for (i = 0; i < MAX_NR_ZONES; i++) { + zonelist = pgdat->node_zonelists + MAX_NR_ZONES + i; + j = build_zonelists_node(pgdat, zonelist, 0, i); + zonelist->zones[j] = NULL; + } +} + +/* * Build zonelists ordered by zone and nodes within zones. * This results in conserving DMA zone[s] until all Normal memory is * exhausted, but results in overflowing to remote node while memory @@ -1961,7 +1977,7 @@ static void build_zonelists(pg_data_t *pgdat) int order = current_zonelist_order; /* initialize zonelists */ - for (i = 0; i < MAX_NR_ZONES; i++) { + for (i = 0; i < MAX_ZONELISTS; i++) { zonelist = pgdat->node_zonelists + i; zonelist->zones[0] = NULL; } @@ -2006,6 +2022,8 @@ static void build_zonelists(pg_data_t *pgdat) /* calculate node order -- i.e., DMA last! */ build_zonelists_in_zone_order(pgdat, j); } + + build_thisnode_zonelists(pgdat); } /* Construct the zonelist performance cache - see further mmzone.h */ |