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Subject[PATCH 4/6] Embed zone_id information within the zonelist->zones pointer
Date

Using two zonelists per node requires very frequent use of zone_idx(). This
is costly as it involves a lookup of another structure and a substraction
operation. As struct zone is always word aligned and normally cache-line
aligned, the pointer values have a number of 0's at the least significant
bits of the address.

This patch embeds the zone_id of a zone in the zonelist->zones pointers.
The real zone pointer is retrieved using the zonelist_zone() helper function.
The ID of the zone is found using zonelist_zone_idx(). To avoid accidental
references, the zones field is renamed to _zones and the type changed to
unsigned long.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Christoph Lameter <clameter@sgi.com>
---
arch/parisc/mm/init.c | 2 -
fs/buffer.c | 6 ++--
include/linux/mmzone.h | 58 ++++++++++++++++++++++++++++++++++++--------
kernel/cpuset.c | 4 +--
mm/hugetlb.c | 3 +-
mm/mempolicy.c | 37 +++++++++++++++++-----------
mm/oom_kill.c | 2 -
mm/page_alloc.c | 52 ++++++++++++++++++++-------------------
mm/slab.c | 2 -
mm/slub.c | 2 -
mm/vmscan.c | 5 +--
mm/vmstat.c | 5 ++-
12 files changed, 114 insertions(+), 64 deletions(-)
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/arch/parisc/mm/init.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/arch/parisc/mm/init.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/arch/parisc/mm/init.c 2007-09-10 16:06:22.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/arch/parisc/mm/init.c 2007-09-10 16:06:31.000000000 +0100
@@ -604,7 +604,7 @@ 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;
+ unsigned long *z;
struct zone *zone;

printk("Zone list for zone %d on node %d: ", j, i);
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/fs/buffer.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/fs/buffer.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/fs/buffer.c 2007-09-10 16:06:22.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/fs/buffer.c 2007-09-10 16:06:31.000000000 +0100
@@ -368,7 +368,7 @@ void invalidate_bdev(struct block_device
*/
static void free_more_memory(void)
{
- struct zone **zones;
+ unsigned long *zones;
int nid;

wakeup_pdflush(1024);
@@ -376,10 +376,10 @@ static void free_more_memory(void)

for_each_online_node(nid) {
zones = first_zones_zonelist(node_zonelist(nid, GFP_NOFS),
- gfp_zone(GFP_NOFS));
+ gfp_zone(GFP_NOFS));
if (*zones)
try_to_free_pages(node_zonelist(nid, GFP_NOFS), 0,
- GFP_NOFS);
+ GFP_NOFS);
}
}

diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/include/linux/mmzone.h linux-2.6.23-rc4-mm1-020_zoneid_zonelist/include/linux/mmzone.h
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/include/linux/mmzone.h 2007-09-10 16:06:22.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/include/linux/mmzone.h 2007-09-10 16:06:31.000000000 +0100
@@ -444,11 +444,18 @@ 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 _zones, additional information is encoded in the
+ * least significant bits of zonelist->_zones. The following helpers are used
+ *
+ * zonelist_zone() - Return the struct zone * for an entry in _zones
+ * zonelist_zone_idx() - Return the index of the zone for an entry
*/
-
struct zonelist {
struct zonelist_cache *zlcache_ptr; // NULL or &zlcache
- struct zone *zones[MAX_ZONES_PER_ZONELIST + 1]; // NULL delimited
+ unsigned long _zones[MAX_ZONES_PER_ZONELIST + 1]; /* Encoded pointer,
+ * 0 delimited
+ */
#ifdef CONFIG_NUMA
struct zonelist_cache zlcache; // optional ...
#endif
@@ -682,14 +689,43 @@ extern struct zone *next_zone(struct zon
zone; \
zone = next_zone(zone))

+/*
+ * SMP will align zones to a large boundary so the zone ID will fit in the
+ * least significant bits. Otherwise, ZONES_SHIFT must be 2 or less
+ */
+#if (defined(CONFIG_SMP) && INTERNODE_CACHE_SHIFT < ZONES_SHIFT) || \
+ ZONES_SHIFT > 2
+#error There is not enough space to embed zone IDs in the zonelist
+#endif
+
+#define ZONELIST_ZONEIDX_MASK ((1UL << ZONES_SHIFT) - 1)
+static inline struct zone *zonelist_zone(unsigned long zone_addr)
+{
+ return (struct zone *)(zone_addr & ~ZONELIST_ZONEIDX_MASK);
+}
+
+static inline int zonelist_zone_idx(unsigned long zone_addr)
+{
+ return zone_addr & ZONELIST_ZONEIDX_MASK;
+}
+
+static inline unsigned long encode_zone_idx(struct zone *zone)
+{
+ unsigned long encoded;
+
+ encoded = (unsigned long)zone | zone_idx(zone);
+ BUG_ON(zonelist_zone(encoded) != zone);
+ return encoded;
+}
+
/* Returns the first zone at or below highest_zoneidx in a zonelist */
-static inline struct zone **first_zones_zonelist(struct zonelist *zonelist,
+static inline unsigned long *first_zones_zonelist(struct zonelist *zonelist,
enum zone_type highest_zoneidx)
{
- struct zone **z;
+ unsigned long *z;

- for (z = zonelist->zones;
- *z && zone_idx(*z) > highest_zoneidx;
+ for (z = zonelist->_zones;
+ zonelist_zone_idx(*z) > highest_zoneidx;
z++)
;

@@ -697,11 +733,11 @@ static inline struct zone **first_zones_
}

/* Returns the next zone at or below highest_zoneidx in a zonelist */
-static inline struct zone **next_zones_zonelist(struct zone **z,
+static inline unsigned long *next_zones_zonelist(unsigned long *z,
enum zone_type highest_zoneidx)
{
/* Find the next suitable zone to use for the allocation */
- for (; *z && zone_idx(*z) > highest_zoneidx; z++)
+ for (; zonelist_zone_idx(*z) > highest_zoneidx; z++)
;

return z;
@@ -717,9 +753,11 @@ static inline struct zone **next_zones_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>
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/kernel/cpuset.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/kernel/cpuset.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/kernel/cpuset.c 2007-09-10 09:29:14.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/kernel/cpuset.c 2007-09-10 16:06:31.000000000 +0100
@@ -1525,8 +1525,8 @@ int cpuset_zonelist_valid_mems_allowed(s
{
int i;

- for (i = 0; zl->zones[i]; i++) {
- int nid = zone_to_nid(zl->zones[i]);
+ for (i = 0; zl->_zones[i]; i++) {
+ int nid = zone_to_nid(zonelist_zone(zl->_zones[i]));

if (node_isset(nid, current->mems_allowed))
return 1;
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/hugetlb.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/hugetlb.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/hugetlb.c 2007-09-10 16:06:22.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/hugetlb.c 2007-09-10 16:06:31.000000000 +0100
@@ -73,7 +73,8 @@ static struct page *dequeue_huge_page(st
struct page *page = NULL;
struct zonelist *zonelist = huge_zonelist(vma, address,
htlb_alloc_mask);
- struct zone *zone, **z;
+ struct zone *zone;
+ unsigned long *z;

for_each_zone_zonelist(zone, z, zonelist, MAX_NR_ZONES - 1) {
nid = zone_to_nid(zone);
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/mempolicy.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/mempolicy.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/mempolicy.c 2007-09-10 16:06:13.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/mempolicy.c 2007-09-10 16:06:31.000000000 +0100
@@ -157,7 +157,7 @@ static struct zonelist *bind_zonelist(no
for_each_node_mask(nd, *nodes) {
struct zone *z = &NODE_DATA(nd)->node_zones[k];
if (z->present_pages > 0)
- zl->zones[num++] = z;
+ zl->_zones[num++] = encode_zone_idx(z);
}
if (k == 0)
break;
@@ -167,7 +167,7 @@ static struct zonelist *bind_zonelist(no
kfree(zl);
return ERR_PTR(-EINVAL);
}
- zl->zones[num] = NULL;
+ zl->_zones[num] = 0;
return zl;
}

@@ -489,9 +489,11 @@ static void get_zonemask(struct mempolic
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->_zones[i]; i++) {
+ struct zone *zone;
+ zone = zonelist_zone(p->v.zonelist->_zones[i]);
+ node_set(zone_to_nid(zone), *nodes);
+ }
break;
case MPOL_DEFAULT:
break;
@@ -1159,12 +1161,15 @@ unsigned slab_node(struct mempolicy *pol
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]);
+ struct zonelist *zonelist;
+ zonelist = policy->v.zonelist;
+ return zone_to_nid(zonelist_zone(zonelist->_zones[0]));
+ }

case MPOL_PREFERRED:
if (policy->v.preferred_node >= 0)
@@ -1242,7 +1247,7 @@ static struct page *alloc_page_interleav

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->_zones[0]))
inc_zone_page_state(page, NUMA_INTERLEAVE_HIT);
return page;
}
@@ -1366,10 +1371,14 @@ int __mpol_equal(struct mempolicy *a, st
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->_zones[i]; i++) {
+ struct zone *za, *zb;
+ za = zonelist_zone(a->v.zonelist->_zones[i]);
+ zb = zonelist_zone(b->v.zonelist->_zones[i]);
+ if (za != zb)
return 0;
- return b->v.zonelist->zones[i] == NULL;
+ }
+ return b->v.zonelist->_zones[i] == 0;
}
default:
BUG();
@@ -1688,12 +1697,12 @@ static void mpol_rebind_policy(struct me
break;
case MPOL_BIND: {
nodemask_t nodes;
- struct zone **z;
+ unsigned long *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->_zones; *z; z++)
+ node_set(zone_to_nid(zonelist_zone(*z)), nodes);
nodes_remap(tmp, nodes, *mpolmask, *newmask);
nodes = tmp;

diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/oom_kill.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/oom_kill.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/oom_kill.c 2007-09-10 16:06:22.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/oom_kill.c 2007-09-10 16:06:31.000000000 +0100
@@ -186,7 +186,7 @@ static inline int constrained_alloc(stru
{
#ifdef CONFIG_NUMA
struct zone *zone;
- struct zone **z;
+ unsigned long *z;
enum zone_type high_zoneidx = gfp_zone(gfp_mask);
nodemask_t nodes = node_states[N_HIGH_MEMORY];

diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/page_alloc.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/page_alloc.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/page_alloc.c 2007-09-10 16:06:22.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/page_alloc.c 2007-09-10 16:06:31.000000000 +0100
@@ -1359,7 +1359,7 @@ static nodemask_t *zlc_setup(struct zone
* 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, unsigned long *z,
nodemask_t *allowednodes)
{
struct zonelist_cache *zlc; /* cached zonelist speedup info */
@@ -1370,7 +1370,7 @@ static int zlc_zone_worth_trying(struct
if (!zlc)
return 1;

- i = z - zonelist->zones;
+ i = z - zonelist->_zones;
n = zlc->z_to_n[i];

/* This zone is worth trying if it is allowed but not full */
@@ -1382,7 +1382,7 @@ static int zlc_zone_worth_trying(struct
* 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, unsigned long *z)
{
struct zonelist_cache *zlc; /* cached zonelist speedup info */
int i; /* index of *z in zonelist zones */
@@ -1391,7 +1391,7 @@ static void zlc_mark_zone_full(struct zo
if (!zlc)
return;

- i = z - zonelist->zones;
+ i = z - zonelist->_zones;

set_bit(i, zlc->fullzones);
}
@@ -1403,13 +1403,13 @@ static nodemask_t *zlc_setup(struct zone
return NULL;
}

-static int zlc_zone_worth_trying(struct zonelist *zonelist, struct zone **z,
+static int zlc_zone_worth_trying(struct zonelist *zonelist, unsigned long *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, unsigned long *z)
{
}
#endif /* CONFIG_NUMA */
@@ -1422,7 +1422,7 @@ 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;
+ unsigned long *z;
struct page *page = NULL;
int classzone_idx;
struct zone *zone;
@@ -1431,7 +1431,7 @@ get_page_from_freelist(gfp_t gfp_mask, u
int did_zlc_setup = 0; /* just call zlc_setup() one time */

z = first_zones_zonelist(zonelist, high_zoneidx);
- classzone_idx = zone_idx(*z);
+ classzone_idx = zonelist_zone_idx(*z);

zonelist_scan:
/*
@@ -1550,7 +1550,8 @@ __alloc_pages(gfp_t gfp_mask, unsigned i
{
const gfp_t wait = gfp_mask & __GFP_WAIT;
enum zone_type high_zoneidx = gfp_zone(gfp_mask);
- struct zone **z;
+ unsigned long *z;
+ struct zone *zone;
struct page *page;
struct reclaim_state reclaim_state;
struct task_struct *p = current;
@@ -1564,9 +1565,9 @@ __alloc_pages(gfp_t gfp_mask, unsigned i
return NULL;

restart:
- z = zonelist->zones; /* the list of zones suitable for gfp_mask */
+ z = zonelist->_zones; /* the list of zones suitable for gfp_mask */

- if (unlikely(*z == NULL)) {
+ if (unlikely(*z == 0)) {
/*
* Happens if we have an empty zonelist as a result of
* GFP_THISNODE being used on a memoryless node
@@ -1590,8 +1591,8 @@ 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
@@ -1794,7 +1795,7 @@ EXPORT_SYMBOL(free_pages);
static unsigned int nr_free_zone_pages(int offset)
{
enum zone_type high_zoneidx = MAX_NR_ZONES - 1;
- struct zone **z;
+ unsigned long *z;
struct zone *zone;

/* Just pick one node, since fallback list is circular */
@@ -1989,7 +1990,7 @@ static int build_zonelists_node(pg_data_
zone_type--;
zone = pgdat->node_zones + zone_type;
if (populated_zone(zone)) {
- zonelist->zones[nr_zones++] = zone;
+ zonelist->_zones[nr_zones++] = encode_zone_idx(zone);
check_highest_zone(zone_type);
}

@@ -2166,11 +2167,11 @@ static void build_zonelists_in_node_orde
struct zonelist *zonelist;

zonelist = &pgdat->node_zonelists[0];
- for (j = 0; zonelist->zones[j] != NULL; j++)
+ for (j = 0; zonelist->_zones[j] != 0; j++)
;
j = build_zonelists_node(NODE_DATA(node), zonelist, j,
MAX_NR_ZONES - 1);
- zonelist->zones[j] = NULL;
+ zonelist->_zones[j] = 0;
}

/*
@@ -2183,7 +2184,7 @@ static void build_thisnode_zonelists(pg_

zonelist = &pgdat->node_zonelists[1];
j = build_zonelists_node(pgdat, zonelist, 0, MAX_NR_ZONES - 1);
- zonelist->zones[j] = NULL;
+ zonelist->_zones[j] = 0;
}

/*
@@ -2208,12 +2209,12 @@ static void build_zonelists_in_zone_orde
node = node_order[j];
z = &NODE_DATA(node)->node_zones[zone_type];
if (populated_zone(z)) {
- zonelist->zones[pos++] = z;
+ zonelist->_zones[pos++] = encode_zone_idx(z);
check_highest_zone(zone_type);
}
}
}
- zonelist->zones[pos] = NULL;
+ zonelist->_zones[pos] = 0;
}

static int default_zonelist_order(void)
@@ -2290,7 +2291,7 @@ static void build_zonelists(pg_data_t *p
/* initialize zonelists */
for (i = 0; i < MAX_ZONELISTS; i++) {
zonelist = pgdat->node_zonelists + i;
- zonelist->zones[0] = NULL;
+ zonelist->_zones[0] = 0;
}

/* NUMA-aware ordering of nodes */
@@ -2342,13 +2343,14 @@ static void build_zonelist_cache(pg_data
{
struct zonelist *zonelist;
struct zonelist_cache *zlc;
- struct zone **z;
+ unsigned long *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->_zones; *z; z++)
+ zlc->z_to_n[z - zonelist->_zones] =
+ zone_to_nid(zonelist_zone(*z));
}


@@ -2391,7 +2393,7 @@ static void build_zonelists(pg_data_t *p
MAX_NR_ZONES - 1);
}

- zonelist->zones[j] = NULL;
+ zonelist->_zones[j] = 0;
}

/* non-NUMA variant of zonelist performance cache - just NULL zlcache_ptr */
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/slab.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/slab.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/slab.c 2007-09-10 16:06:22.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/slab.c 2007-09-10 16:06:31.000000000 +0100
@@ -3241,7 +3241,7 @@ static void *fallback_alloc(struct kmem_
{
struct zonelist *zonelist;
gfp_t local_flags;
- struct zone **z;
+ unsigned long *z;
struct zone *zone;
enum zone_type high_zoneidx = gfp_zone(flags);
void *obj = NULL;
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/slub.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/slub.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/slub.c 2007-09-10 16:06:22.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/slub.c 2007-09-10 16:06:31.000000000 +0100
@@ -1257,7 +1257,7 @@ static struct page *get_any_partial(stru
{
#ifdef CONFIG_NUMA
struct zonelist *zonelist;
- struct zone **z;
+ unsigned long *z;
struct zone *zone;
enum zone_type high_zoneidx = gfp_zone(flags);
struct page *page;
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/vmscan.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/vmscan.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/vmscan.c 2007-09-10 16:06:22.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/vmscan.c 2007-09-10 16:06:31.000000000 +0100
@@ -1211,7 +1211,7 @@ static unsigned long shrink_zones(int pr
struct scan_control *sc)
{
unsigned long nr_reclaimed = 0;
- struct zone **z;
+ unsigned long *z;
struct zone *zone;

sc->all_unreclaimable = 1;
@@ -1256,10 +1256,9 @@ unsigned long do_try_to_free_pages(struc
unsigned long nr_reclaimed = 0;
struct reclaim_state *reclaim_state = current->reclaim_state;
unsigned long lru_pages = 0;
- struct zone **z;
+ unsigned long *z;
struct zone *zone;
enum zone_type high_zoneidx = gfp_zone(gfp_mask);
- int i;

count_vm_event(ALLOCSTALL);

diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/vmstat.c linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/vmstat.c
--- linux-2.6.23-rc4-mm1-010_use_two_zonelists/mm/vmstat.c 2007-09-10 09:29:14.000000000 +0100
+++ linux-2.6.23-rc4-mm1-020_zoneid_zonelist/mm/vmstat.c 2007-09-10 16:06:31.000000000 +0100
@@ -365,11 +365,12 @@ void refresh_cpu_vm_stats(int cpu)
*/
void zone_statistics(struct zonelist *zonelist, struct zone *z)
{
- if (z->zone_pgdat == zonelist->zones[0]->zone_pgdat) {
+ if (z->zone_pgdat == zonelist_zone(zonelist->_zones[0])->zone_pgdat) {
__inc_zone_state(z, NUMA_HIT);
} else {
__inc_zone_state(z, NUMA_MISS);
- __inc_zone_state(zonelist->zones[0], NUMA_FOREIGN);
+ __inc_zone_state(zonelist_zone(zonelist->_zones[0]),
+ NUMA_FOREIGN);
}
if (z->node == numa_node_id())
__inc_zone_state(z, NUMA_LOCAL);
-
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