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-rw-r--r--mm/page_alloc.c68
1 files changed, 38 insertions, 30 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4ccb8651cf22..6d94d04ea784 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1317,7 +1317,7 @@ static nodemask_t *zlc_setup(struct zonelist *zonelist, int alloc_flags)
* We are low on memory in the second scan, and should leave no stone
* unturned looking for a free page.
*/
-static int zlc_zone_worth_trying(struct zonelist *zonelist, struct zone **z,
+static int zlc_zone_worth_trying(struct zonelist *zonelist, struct zoneref *z,
nodemask_t *allowednodes)
{
struct zonelist_cache *zlc; /* cached zonelist speedup info */
@@ -1328,7 +1328,7 @@ static int zlc_zone_worth_trying(struct zonelist *zonelist, struct zone **z,
if (!zlc)
return 1;
- i = z - zonelist->zones;
+ i = z - zonelist->_zonerefs;
n = zlc->z_to_n[i];
/* This zone is worth trying if it is allowed but not full */
@@ -1340,7 +1340,7 @@ static int zlc_zone_worth_trying(struct zonelist *zonelist, struct zone **z,
* zlc->fullzones, so that subsequent attempts to allocate a page
* from that zone don't waste time re-examining it.
*/
-static void zlc_mark_zone_full(struct zonelist *zonelist, struct zone **z)
+static void zlc_mark_zone_full(struct zonelist *zonelist, struct zoneref *z)
{
struct zonelist_cache *zlc; /* cached zonelist speedup info */
int i; /* index of *z in zonelist zones */
@@ -1349,7 +1349,7 @@ static void zlc_mark_zone_full(struct zonelist *zonelist, struct zone **z)
if (!zlc)
return;
- i = z - zonelist->zones;
+ i = z - zonelist->_zonerefs;
set_bit(i, zlc->fullzones);
}
@@ -1361,13 +1361,13 @@ static nodemask_t *zlc_setup(struct zonelist *zonelist, int alloc_flags)
return NULL;
}
-static int zlc_zone_worth_trying(struct zonelist *zonelist, struct zone **z,
+static int zlc_zone_worth_trying(struct zonelist *zonelist, struct zoneref *z,
nodemask_t *allowednodes)
{
return 1;
}
-static void zlc_mark_zone_full(struct zonelist *zonelist, struct zone **z)
+static void zlc_mark_zone_full(struct zonelist *zonelist, struct zoneref *z)
{
}
#endif /* CONFIG_NUMA */
@@ -1380,7 +1380,7 @@ static struct page *
get_page_from_freelist(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, int high_zoneidx, int alloc_flags)
{
- struct zone **z;
+ struct zoneref *z;
struct page *page = NULL;
int classzone_idx;
struct zone *zone, *preferred_zone;
@@ -1389,8 +1389,8 @@ get_page_from_freelist(gfp_t gfp_mask, unsigned int order,
int did_zlc_setup = 0; /* just call zlc_setup() one time */
z = first_zones_zonelist(zonelist, high_zoneidx);
- classzone_idx = zone_idx(*z);
- preferred_zone = *z;
+ classzone_idx = zonelist_zone_idx(z);
+ preferred_zone = zonelist_zone(z);
zonelist_scan:
/*
@@ -1453,7 +1453,8 @@ __alloc_pages(gfp_t gfp_mask, unsigned int order,
{
const gfp_t wait = gfp_mask & __GFP_WAIT;
enum zone_type high_zoneidx = gfp_zone(gfp_mask);
- struct zone **z;
+ struct zoneref *z;
+ struct zone *zone;
struct page *page;
struct reclaim_state reclaim_state;
struct task_struct *p = current;
@@ -1467,9 +1468,9 @@ __alloc_pages(gfp_t gfp_mask, unsigned int order,
return NULL;
restart:
- z = zonelist->zones; /* the list of zones suitable for gfp_mask */
+ z = zonelist->_zonerefs; /* the list of zones suitable for gfp_mask */
- if (unlikely(*z == NULL)) {
+ if (unlikely(!z->zone)) {
/*
* Happens if we have an empty zonelist as a result of
* GFP_THISNODE being used on a memoryless node
@@ -1493,8 +1494,8 @@ restart:
if (NUMA_BUILD && (gfp_mask & GFP_THISNODE) == GFP_THISNODE)
goto nopage;
- for (z = zonelist->zones; *z; z++)
- wakeup_kswapd(*z, order);
+ for_each_zone_zonelist(zone, z, zonelist, high_zoneidx)
+ wakeup_kswapd(zone, order);
/*
* OK, we're below the kswapd watermark and have kicked background
@@ -1575,7 +1576,7 @@ nofail_alloc:
if (page)
goto got_pg;
} else if ((gfp_mask & __GFP_FS) && !(gfp_mask & __GFP_NORETRY)) {
- if (!try_set_zone_oom(zonelist)) {
+ if (!try_set_zone_oom(zonelist, gfp_mask)) {
schedule_timeout_uninterruptible(1);
goto restart;
}
@@ -1589,18 +1590,18 @@ nofail_alloc:
page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, order,
zonelist, high_zoneidx, ALLOC_WMARK_HIGH|ALLOC_CPUSET);
if (page) {
- clear_zonelist_oom(zonelist);
+ clear_zonelist_oom(zonelist, gfp_mask);
goto got_pg;
}
/* The OOM killer will not help higher order allocs so fail */
if (order > PAGE_ALLOC_COSTLY_ORDER) {
- clear_zonelist_oom(zonelist);
+ clear_zonelist_oom(zonelist, gfp_mask);
goto nopage;
}
out_of_memory(zonelist, gfp_mask, order);
- clear_zonelist_oom(zonelist);
+ clear_zonelist_oom(zonelist, gfp_mask);
goto restart;
}
@@ -1702,7 +1703,7 @@ EXPORT_SYMBOL(free_pages);
static unsigned int nr_free_zone_pages(int offset)
{
- struct zone **z;
+ struct zoneref *z;
struct zone *zone;
/* Just pick one node, since fallback list is circular */
@@ -1896,7 +1897,8 @@ static int build_zonelists_node(pg_data_t *pgdat, struct zonelist *zonelist,
zone_type--;
zone = pgdat->node_zones + zone_type;
if (populated_zone(zone)) {
- zonelist->zones[nr_zones++] = zone;
+ zoneref_set_zone(zone,
+ &zonelist->_zonerefs[nr_zones++]);
check_highest_zone(zone_type);
}
@@ -2072,11 +2074,12 @@ static void build_zonelists_in_node_order(pg_data_t *pgdat, int node)
struct zonelist *zonelist;
zonelist = &pgdat->node_zonelists[0];
- for (j = 0; zonelist->zones[j] != NULL; j++)
+ for (j = 0; zonelist->_zonerefs[j].zone != NULL; j++)
;
j = build_zonelists_node(NODE_DATA(node), zonelist, j,
MAX_NR_ZONES - 1);
- zonelist->zones[j] = NULL;
+ zonelist->_zonerefs[j].zone = NULL;
+ zonelist->_zonerefs[j].zone_idx = 0;
}
/*
@@ -2089,7 +2092,8 @@ static void build_thisnode_zonelists(pg_data_t *pgdat)
zonelist = &pgdat->node_zonelists[1];
j = build_zonelists_node(pgdat, zonelist, 0, MAX_NR_ZONES - 1);
- zonelist->zones[j] = NULL;
+ zonelist->_zonerefs[j].zone = NULL;
+ zonelist->_zonerefs[j].zone_idx = 0;
}
/*
@@ -2114,12 +2118,14 @@ static void build_zonelists_in_zone_order(pg_data_t *pgdat, int nr_nodes)
node = node_order[j];
z = &NODE_DATA(node)->node_zones[zone_type];
if (populated_zone(z)) {
- zonelist->zones[pos++] = z;
+ zoneref_set_zone(z,
+ &zonelist->_zonerefs[pos++]);
check_highest_zone(zone_type);
}
}
}
- zonelist->zones[pos] = NULL;
+ zonelist->_zonerefs[pos].zone = NULL;
+ zonelist->_zonerefs[pos].zone_idx = 0;
}
static int default_zonelist_order(void)
@@ -2196,7 +2202,8 @@ static void build_zonelists(pg_data_t *pgdat)
/* initialize zonelists */
for (i = 0; i < MAX_ZONELISTS; i++) {
zonelist = pgdat->node_zonelists + i;
- zonelist->zones[0] = NULL;
+ zonelist->_zonerefs[0].zone = NULL;
+ zonelist->_zonerefs[0].zone_idx = 0;
}
/* NUMA-aware ordering of nodes */
@@ -2248,13 +2255,13 @@ static void build_zonelist_cache(pg_data_t *pgdat)
{
struct zonelist *zonelist;
struct zonelist_cache *zlc;
- struct zone **z;
+ struct zoneref *z;
zonelist = &pgdat->node_zonelists[0];
zonelist->zlcache_ptr = zlc = &zonelist->zlcache;
bitmap_zero(zlc->fullzones, MAX_ZONES_PER_ZONELIST);
- for (z = zonelist->zones; *z; z++)
- zlc->z_to_n[z - zonelist->zones] = zone_to_nid(*z);
+ for (z = zonelist->_zonerefs; z->zone; z++)
+ zlc->z_to_n[z - zonelist->_zonerefs] = zonelist_node_idx(z);
}
@@ -2297,7 +2304,8 @@ static void build_zonelists(pg_data_t *pgdat)
MAX_NR_ZONES - 1);
}
- zonelist->zones[j] = NULL;
+ zonelist->_zonerefs[j].zone = NULL;
+ zonelist->_zonerefs[j].zone_idx = 0;
}
/* non-NUMA variant of zonelist performance cache - just NULL zlcache_ptr */