projects/linux·commit dd1a239f

mm: have zonelist contains structs with both a zone pointer and zone_idx

dd1a239f · Mel Gorman <[email protected]> · 2008-04-28 02:12:17 -07:00

Filtering zonelists requires very frequent use of zone_idx().  This is costly
as it involves a lookup of another structure and a substraction operation.  As
the zone_idx is often required, it should be quickly accessible.  The node idx
could also be stored here if it was found that accessing zone->node is
significant which may be the case on workloads where nodemasks are heavily
used.

This patch introduces a struct zoneref to store a zone pointer and a zone
index.  The zonelist then consists of an array of these struct zonerefs which
are looked up as necessary.  Helpers are given for accessing the zone index as
well as the node index.

[[email protected]: Suggested struct zoneref instead of embedding information in pointers]
[[email protected]: mm-have-zonelist: fix memcg ooms]
[[email protected]: just return do_try_to_free_pages]
[[email protected]: do_try_to_free_pages gfp_mask redundant]
Signed-off-by: Mel Gorman <[email protected]>
Acked-by: Christoph Lameter <[email protected]>
Acked-by: David Rientjes <[email protected]>
Signed-off-by: Lee Schermerhorn <[email protected]>
Cc: KAMEZAWA Hiroyuki <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Nick Piggin <[email protected]>
Signed-off-by: Hugh Dickins <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Commit
dd1a239f6f2d4d3eedd318583ec319aa145b324c
Parents
54a6eb5c

Changes

12 files changed · +158 −100

FileStatusAddDelContent
arch/parisc/mm/init.cmodified+1−1View file
fs/buffer.cmodified+3−3View file
include/linux/mmzone.hmodified+54−10View file
include/linux/oom.hmodified+2−2View file
kernel/cpuset.cmodified+2−2View file
mm/hugetlb.cmodified+2−1View file
mm/mempolicy.cmodified+22−14View file
mm/oom_kill.cmodified+22−23View file
mm/page_alloc.cmodified+38−30View file
mm/slab.cmodified+1−1View file
mm/slub.cmodified+1−1View file
mm/vmscan.cmodified+10−12View file

Only the first 600 diff lines are shown. Download the complete patch.

arch/parisc/mm/init.c

View file
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 9bb6136..1f01284 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -608,7 +608,7 @@ void show_mem(void)
for (i = 0; i < npmem_ranges; i++) {
zl = node_zonelist(i);
for (j = 0; j < MAX_NR_ZONES; j++) {
- struct zone **z;
+ struct zoneref *z;
struct zone *zone;
printk("Zone list for zone %d on node %d: ", j, i);

fs/buffer.c

View file
diff --git a/fs/buffer.c b/fs/buffer.c
index 9b5434a..ac84cd1 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -360,16 +360,16 @@ void invalidate_bdev(struct block_device *bdev)
*/
static void free_more_memory(void)
{
- struct zone **zones;
+ struct zoneref *zrefs;
int nid;
wakeup_pdflush(1024);
yield();
for_each_online_node(nid) {
- zones = first_zones_zonelist(node_zonelist(nid, GFP_NOFS),
+ zrefs = first_zones_zonelist(node_zonelist(nid, GFP_NOFS),
gfp_zone(GFP_NOFS));
- if (*zones)
+ if (zrefs->zone)
try_to_free_pages(node_zonelist(nid, GFP_NOFS), 0,
GFP_NOFS);
}

include/linux/mmzone.h

View file
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index d5c33a0..d34b4c2 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -469,6 +469,15 @@ struct zonelist_cache;
#endif
/*
+ * This struct contains information about a zone in a zonelist. It is stored
+ * here to avoid dereferences into large structures and lookups of tables
+ */
+struct zoneref {
+ struct zone *zone; /* Pointer to actual zone */
+ int zone_idx; /* zone_idx(zoneref->zone) */
+};
+
+/*
* One allocation request operates on a zonelist. A zonelist
* is a list of zones, the first one is the 'goal' of the
* allocation, the other zones are fallback zones, in decreasing
@@ -476,11 +485,18 @@ struct zonelist_cache;
*
* If zlcache_ptr is not NULL, then it is just the address of zlcache,
* as explained above. If zlcache_ptr is NULL, there is no zlcache.
+ * *
+ * To speed the reading of the zonelist, the zonerefs contain the zone index
+ * of the entry being read. Helper functions to access information given
+ * a struct zoneref are
+ *
+ * zonelist_zone() - Return the struct zone * for an entry in _zonerefs
+ * zonelist_zone_idx() - Return the index of the zone for an entry
+ * zonelist_node_idx() - Return the index of the node for an entry
*/
-
struct zonelist {
struct zonelist_cache *zlcache_ptr; // NULL or &zlcache
- struct zone *zones[MAX_ZONES_PER_ZONELIST + 1]; // NULL delimited
+ struct zoneref _zonerefs[MAX_ZONES_PER_ZONELIST + 1];
#ifdef CONFIG_NUMA
struct zonelist_cache zlcache; // optional ...
#endif
@@ -713,26 +729,52 @@ extern struct zone *next_zone(struct zone *zone);
zone; \
zone = next_zone(zone))
+static inline struct zone *zonelist_zone(struct zoneref *zoneref)
+{
+ return zoneref->zone;
+}
+
+static inline int zonelist_zone_idx(struct zoneref *zoneref)
+{
+ return zoneref->zone_idx;
+}
+
+static inline int zonelist_node_idx(struct zoneref *zoneref)
+{
+#ifdef CONFIG_NUMA
+ /* zone_to_nid not available in this context */
+ return zoneref->zone->node;
+#else
+ return 0;
+#endif /* CONFIG_NUMA */
+}
+
+static inline void zoneref_set_zone(struct zone *zone, struct zoneref *zoneref)
+{
+ zoneref->zone = zone;
+ zoneref->zone_idx = zone_idx(zone);
+}
+
/* Returns the first zone at or below highest_zoneidx in a zonelist */
-static inline struct zone **first_zones_zonelist(struct zonelist *zonelist,
+static inline struct zoneref *first_zones_zonelist(struct zonelist *zonelist,
enum zone_type highest_zoneidx)
{
- struct zone **z;
+ struct zoneref *z;
/* Find the first suitable zone to use for the allocation */
- z = zonelist->zones;
- while (*z && zone_idx(*z) > highest_zoneidx)
+ z = zonelist->_zonerefs;
+ while (zonelist_zone_idx(z) > highest_zoneidx)
z++;
return z;
}
/* Returns the next zone at or below highest_zoneidx in a zonelist */
-static inline struct zone **next_zones_zonelist(struct zone **z,
+static inline struct zoneref *next_zones_zonelist(struct zoneref *z,
enum zone_type highest_zoneidx)
{
/* Find the next suitable zone to use for the allocation */
- while (*z && zone_idx(*z) > highest_zoneidx)
+ while (zonelist_zone_idx(z) > highest_zoneidx)
z++;
return z;
@@ -748,9 +790,11 @@ static inline struct zone **next_zones_zonelist(struct zone **z,
* This iterator iterates though all zones at or below a given zone index.
*/
#define for_each_zone_zonelist(zone, z, zlist, highidx) \
- for (z = first_zones_zonelist(zlist, highidx), zone = *z++; \
+ for (z = first_zones_zonelist(zlist, highidx), \
+ zone = zonelist_zone(z++); \
zone; \
- z = next_zones_zonelist(z, highidx), zone = *z++)
+ z = next_zones_zonelist(z, highidx), \
+ zone = zonelist_zone(z++))
#ifdef CONFIG_SPARSEMEM
#include <asm/sparsemem.h>

include/linux/oom.h

View file
diff --git a/include/linux/oom.h b/include/linux/oom.h
index 3852436..a7979ba 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -23,8 +23,8 @@ enum oom_constraint {
CONSTRAINT_MEMORY_POLICY,
};
-extern int try_set_zone_oom(struct zonelist *zonelist);
-extern void clear_zonelist_oom(struct zonelist *zonelist);
+extern int try_set_zone_oom(struct zonelist *zonelist, gfp_t gfp_flags);
+extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order);
extern int register_oom_notifier(struct notifier_block *nb);

kernel/cpuset.c

View file
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 8b35fbd..a220b13 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1967,8 +1967,8 @@ int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
{
int i;
- for (i = 0; zl->zones[i]; i++) {
- int nid = zone_to_nid(zl->zones[i]);
+ for (i = 0; zl->_zonerefs[i].zone; i++) {
+ int nid = zonelist_node_idx(&zl->_zonerefs[i]);
if (node_isset(nid, current->mems_allowed))
return 1;

mm/hugetlb.c

View file
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index ddd141c..4bced0d 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -97,7 +97,8 @@ static struct page *dequeue_huge_page_vma(struct vm_area_struct *vma,
struct mempolicy *mpol;
struct zonelist *zonelist = huge_zonelist(vma, address,
htlb_alloc_mask, &mpol);
- struct zone *zone, **z;
+ struct zone *zone;
+ struct zoneref *z;
for_each_zone_zonelist(zone, z, zonelist, MAX_NR_ZONES - 1) {
nid = zone_to_nid(zone);

mm/mempolicy.c

View file
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 5d20bf4..90193a2 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -186,7 +186,7 @@ static struct zonelist *bind_zonelist(nodemask_t *nodes)
for_each_node_mask(nd, *nodes) {
struct zone *z = &NODE_DATA(nd)->node_zones[k];
if (z->present_pages > 0)
- zl->zones[num++] = z;
+ zoneref_set_zone(z, &zl->_zonerefs[num++]);
}
if (k == 0)
break;
@@ -196,7 +196,8 @@ static struct zonelist *bind_zonelist(nodemask_t *nodes)
kfree(zl);
return ERR_PTR(-EINVAL);
}
- zl->zones[num] = NULL;
+ zl->_zonerefs[num].zone = NULL;
+ zl->_zonerefs[num].zone_idx = 0;
return zl;
}
@@ -504,9 +505,11 @@ static void get_zonemask(struct mempolicy *p, nodemask_t *nodes)
nodes_clear(*nodes);
switch (p->policy) {
case MPOL_BIND:
- for (i = 0; p->v.zonelist->zones[i]; i++)
- node_set(zone_to_nid(p->v.zonelist->zones[i]),
- *nodes);
+ for (i = 0; p->v.zonelist->_zonerefs[i].zone; i++) {
+ struct zoneref *zref;
+ zref = &p->v.zonelist->_zonerefs[i];
+ node_set(zonelist_node_idx(zref), *nodes);
+ }
break;
case MPOL_DEFAULT:
break;
@@ -1212,12 +1215,13 @@ unsigned slab_node(struct mempolicy *policy)
case MPOL_INTERLEAVE:
return interleave_nodes(policy);
- case MPOL_BIND:
+ case MPOL_BIND: {
/*
* Follow bind policy behavior and start allocation at the
* first node.
*/
- return zone_to_nid(policy->v.zonelist->zones[0]);
+ return zonelist_node_idx(policy->v.zonelist->_zonerefs);
+ }
case MPOL_PREFERRED:
if (policy->v.preferred_node >= 0)
@@ -1323,7 +1327,7 @@ static struct page *alloc_page_interleave(gfp_t gfp, unsigned order,
zl = node_zonelist(nid, gfp);
page = __alloc_pages(gfp, order, zl);
- if (page && page_zone(page) == zl->zones[0])
+ if (page && page_zone(page) == zonelist_zone(&zl->_zonerefs[0]))
inc_zone_page_state(page, NUMA_INTERLEAVE_HIT);
return page;
}
@@ -1463,10 +1467,14 @@ int __mpol_equal(struct mempolicy *a, struct mempolicy *b)
return a->v.preferred_node == b->v.preferred_node;
case MPOL_BIND: {
int i;
- for (i = 0; a->v.zonelist->zones[i]; i++)
- if (a->v.zonelist->zones[i] != b->v.zonelist->zones[i])
+ for (i = 0; a->v.zonelist->_zonerefs[i].zone; i++) {
+ struct zone *za, *zb;
+ za = zonelist_zone(&a->v.zonelist->_zonerefs[i]);
+ zb = zonelist_zone(&b->v.zonelist->_zonerefs[i]);
+ if (za != zb)
return 0;
- return b->v.zonelist->zones[i] == NULL;
+ }
+ return b->v.zonelist->_zonerefs[i].zone == NULL;
}
default:
BUG();
@@ -1785,12 +1793,12 @@ static void mpol_rebind_policy(struct mempolicy *pol,
break;
case MPOL_BIND: {
nodemask_t nodes;
- struct zone **z;
+ struct zoneref *z;
struct zonelist *zonelist;
nodes_clear(nodes);
- for (z = pol->v.zonelist->zones; *z; z++)
- node_set(zone_to_nid(*z), nodes);
+ for (z = pol->v.zonelist->_zonerefs; z->zone; z++)
+ node_set(zonelist_node_idx(z), nodes);
nodes_remap(tmp, nodes, *mpolmask, *newmask);
nodes = tmp;

mm/oom_kill.c

View file
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 2c93502..e41504a 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -176,7 +176,7 @@ static inline enum oom_constraint constrained_alloc(struct zonelist *zonelist,
{
#ifdef CONFIG_NUMA
struct zone *zone;
- struct zone **z;
+ struct zoneref *z;
enum zone_type high_zoneidx = gfp_zone(gfp_mask);
nodemask_t nodes = node_states[N_HIGH_MEMORY];
@@ -462,29 +462,29 @@ EXPORT_SYMBOL_GPL(unregister_oom_notifier);
* if a parallel OOM killing is already taking place that includes a zone in
* the zonelist. Otherwise, locks all zones in the zonelist and returns 1.
*/
-int try_set_zone_oom(struct zonelist *zonelist)
+int try_set_zone_oom(struct zonelist *zonelist, gfp_t gfp_mask)
{
- struct zone **z;
+ struct zoneref *z;
+ struct zone *zone;
int ret = 1;
- z = zonelist->zones;
-
spin_lock(&zone_scan_mutex);
- do {
- if (zone_is_oom_locked(*z)) {
+ for_each_zone_zonelist(zone, z, zonelist, gfp_zone(gfp_mask)) {
+ if (zone_is_oom_locked(zone)) {
ret = 0;
goto out;
}
- } while (*(++z) != NULL);
+ }
+
+ for_each_zone_zonelist(zone, z, zonelist, gfp_zone(gfp_mask)) {
+ /*
+ * Lock each zone in the zonelist under zone_scan_mutex so a
+ * parallel invocation of try_set_zone_oom() doesn't succeed
+ * when it shouldn't.
+ */
+ zone_set_flag(zone, ZONE_OOM_LOCKED);
+ }
- /*
- * Lock each zone in the zonelist under zone_scan_mutex so a parallel
- * invocation of try_set_zone_oom() doesn't succeed when it shouldn't.
- */
- z = zonelist->zones;
- do {
- zone_set_flag(*z, ZONE_OOM_LOCKED);
- } while (*(++z) != NULL);
out:
spin_unlock(&zone_scan_mutex);
return ret;
@@ -495,16 +495,15 @@ out:
* allocation attempts with zonelists containing them may now recall the OOM
* killer, if necessary.
*/
-void clear_zonelist_oom(struct zonelist *zonelist)
+void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_mask)
{
- struct zone **z;
-
- z = zonelist->zones;
+ struct zoneref *z;
+ struct zone *zone;
spin_lock(&zone_scan_mutex);
- do {
- zone_clear_flag(*z, ZONE_OOM_LOCKED);
- } while (*(++z) != NULL);
+ for_each_zone_zonelist(zone, z, zonelist, gfp_zone(gfp_mask)) {
+ zone_clear_flag(zone, ZONE_OOM_LOCKED);
+ }
spin_unlock(&zone_scan_mutex);
}

mm/page_alloc.c

View file
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4ccb865..6d94d04 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);
}

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mm/slab.c

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mm/slub.c

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mm/vmscan.c

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