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Message-Id: <20071211202237.1961.23040.sendpatchset@skynet.skynet.ie>
Date: Tue, 11 Dec 2007 20:22:37 +0000 (GMT)
From: Mel Gorman <mel@....ul.ie>
To: akpm@...ux-foundation.org
Cc: Lee.Schermerhorn@...com, Mel Gorman <mel@....ul.ie>,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
rientjes@...gle.com, kamezawa.hiroyu@...fujitsu.com,
clameter@....com
Subject: [PATCH 2/6] Introduce node_zonelist() for accessing the zonelist for a GFP mask
This patch introduces a node_zonelist() helper function. It is used to lookup
the appropriate zonelist given a node and a GFP mask. The patch on its own is
a cleanup but it helps clarify parts of the one-zonelist-per-node patchset. If
necessary, it can be merged with the next patch in this set without problems.
Reviewed-by: Christoph Lameter <clameter@....com>
Signed-off-by: Mel Gorman <mel@....ul.ie>
---
drivers/char/sysrq.c | 3 +--
fs/buffer.c | 6 +++---
include/linux/gfp.h | 8 ++++++--
include/linux/mempolicy.h | 2 +-
mm/mempolicy.c | 6 +++---
mm/page_alloc.c | 3 +--
mm/slab.c | 3 +--
mm/slub.c | 3 +--
8 files changed, 17 insertions(+), 17 deletions(-)
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.24-rc4-mm1-005_freepages_zonelist/drivers/char/sysrq.c linux-2.6.24-rc4-mm1-007_node_zonelist/drivers/char/sysrq.c
--- linux-2.6.24-rc4-mm1-005_freepages_zonelist/drivers/char/sysrq.c 2007-12-04 04:26:10.000000000 +0000
+++ linux-2.6.24-rc4-mm1-007_node_zonelist/drivers/char/sysrq.c 2007-12-07 13:51:01.000000000 +0000
@@ -271,8 +271,7 @@ static struct sysrq_key_op sysrq_term_op
static void moom_callback(struct work_struct *ignored)
{
- out_of_memory(&NODE_DATA(0)->node_zonelists[ZONE_NORMAL],
- GFP_KERNEL, 0);
+ out_of_memory(node_zonelist(0, GFP_KERNEL), GFP_KERNEL, 0);
}
static DECLARE_WORK(moom_work, moom_callback);
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.24-rc4-mm1-005_freepages_zonelist/fs/buffer.c linux-2.6.24-rc4-mm1-007_node_zonelist/fs/buffer.c
--- linux-2.6.24-rc4-mm1-005_freepages_zonelist/fs/buffer.c 2007-12-07 15:13:16.000000000 +0000
+++ linux-2.6.24-rc4-mm1-007_node_zonelist/fs/buffer.c 2007-12-07 15:15:47.000000000 +0000
@@ -369,13 +369,13 @@ void invalidate_bdev(struct block_device
static void free_more_memory(void)
{
struct zonelist *zonelist;
- pg_data_t *pgdat;
+ int nid;
wakeup_pdflush(1024);
yield();
- for_each_online_pgdat(pgdat) {
- zonelist = &pgdat->node_zonelists[gfp_zone(GFP_NOFS)];
+ for_each_online_node(nid) {
+ zonelist = node_zonelist(nid, GFP_NOFS);
if (zonelist->zones[0])
try_to_free_pages(zonelist, 0, GFP_NOFS);
}
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.24-rc4-mm1-005_freepages_zonelist/include/linux/gfp.h linux-2.6.24-rc4-mm1-007_node_zonelist/include/linux/gfp.h
--- linux-2.6.24-rc4-mm1-005_freepages_zonelist/include/linux/gfp.h 2007-12-07 12:14:07.000000000 +0000
+++ linux-2.6.24-rc4-mm1-007_node_zonelist/include/linux/gfp.h 2007-12-07 13:51:01.000000000 +0000
@@ -160,10 +160,15 @@ static inline gfp_t set_migrateflags(gfp
/*
* We get the zone list from the current node and the gfp_mask.
* This zone list contains a maximum of MAXNODES*MAX_NR_ZONES zones.
+ * There are many zonelists per node, two for each active zone.
*
* For the normal case of non-DISCONTIGMEM systems the NODE_DATA() gets
* optimized to &contig_page_data at compile-time.
*/
+static inline struct zonelist *node_zonelist(int nid, gfp_t flags)
+{
+ return NODE_DATA(nid)->node_zonelists + gfp_zone(flags);
+}
#ifndef HAVE_ARCH_FREE_PAGE
static inline void arch_free_page(struct page *page, int order) { }
@@ -185,8 +190,7 @@ static inline struct page *alloc_pages_n
if (nid < 0)
nid = numa_node_id();
- return __alloc_pages(gfp_mask, order,
- NODE_DATA(nid)->node_zonelists + gfp_zone(gfp_mask));
+ return __alloc_pages(gfp_mask, order, node_zonelist(nid, gfp_mask));
}
#ifdef CONFIG_NUMA
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.24-rc4-mm1-005_freepages_zonelist/include/linux/mempolicy.h linux-2.6.24-rc4-mm1-007_node_zonelist/include/linux/mempolicy.h
--- linux-2.6.24-rc4-mm1-005_freepages_zonelist/include/linux/mempolicy.h 2007-12-04 04:26:10.000000000 +0000
+++ linux-2.6.24-rc4-mm1-007_node_zonelist/include/linux/mempolicy.h 2007-12-07 13:51:01.000000000 +0000
@@ -241,7 +241,7 @@ static inline void mpol_fix_fork_child_f
static inline struct zonelist *huge_zonelist(struct vm_area_struct *vma,
unsigned long addr, gfp_t gfp_flags, struct mempolicy **mpol)
{
- return NODE_DATA(0)->node_zonelists + gfp_zone(gfp_flags);
+ return node_zonelist(0, gfp_flags);
}
static inline int do_migrate_pages(struct mm_struct *mm,
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.24-rc4-mm1-005_freepages_zonelist/mm/mempolicy.c linux-2.6.24-rc4-mm1-007_node_zonelist/mm/mempolicy.c
--- linux-2.6.24-rc4-mm1-005_freepages_zonelist/mm/mempolicy.c 2007-12-07 12:14:07.000000000 +0000
+++ linux-2.6.24-rc4-mm1-007_node_zonelist/mm/mempolicy.c 2007-12-07 13:51:01.000000000 +0000
@@ -1172,7 +1172,7 @@ static struct zonelist *zonelist_policy(
nd = 0;
BUG();
}
- return NODE_DATA(nd)->node_zonelists + gfp_zone(gfp);
+ return node_zonelist(nd, gfp);
}
/* Do dynamic interleaving for a process */
@@ -1286,7 +1286,7 @@ struct zonelist *huge_zonelist(struct vm
nid = interleave_nid(pol, vma, addr, HPAGE_SHIFT);
__mpol_free(pol); /* finished with pol */
- return NODE_DATA(nid)->node_zonelists + gfp_zone(gfp_flags);
+ return node_zonelist(nid, gfp_flags);
}
zl = zonelist_policy(GFP_HIGHUSER, pol);
@@ -1308,7 +1308,7 @@ static struct page *alloc_page_interleav
struct zonelist *zl;
struct page *page;
- zl = NODE_DATA(nid)->node_zonelists + gfp_zone(gfp);
+ zl = node_zonelist(nid, gfp);
page = __alloc_pages(gfp, order, zl);
if (page && page_zone(page) == zl->zones[0])
inc_zone_page_state(page, NUMA_INTERLEAVE_HIT);
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.24-rc4-mm1-005_freepages_zonelist/mm/page_alloc.c linux-2.6.24-rc4-mm1-007_node_zonelist/mm/page_alloc.c
--- linux-2.6.24-rc4-mm1-005_freepages_zonelist/mm/page_alloc.c 2007-12-07 12:17:22.000000000 +0000
+++ linux-2.6.24-rc4-mm1-007_node_zonelist/mm/page_alloc.c 2007-12-07 13:51:01.000000000 +0000
@@ -1772,10 +1772,9 @@ EXPORT_SYMBOL(free_pages);
static unsigned int nr_free_zone_pages(int offset)
{
/* Just pick one node, since fallback list is circular */
- pg_data_t *pgdat = NODE_DATA(numa_node_id());
unsigned int sum = 0;
- struct zonelist *zonelist = pgdat->node_zonelists + offset;
+ struct zonelist *zonelist = node_zonelist(numa_node_id(), GFP_KERNEL);
struct zone **zonep = zonelist->zones;
struct zone *zone;
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.24-rc4-mm1-005_freepages_zonelist/mm/slab.c linux-2.6.24-rc4-mm1-007_node_zonelist/mm/slab.c
--- linux-2.6.24-rc4-mm1-005_freepages_zonelist/mm/slab.c 2007-12-07 12:14:07.000000000 +0000
+++ linux-2.6.24-rc4-mm1-007_node_zonelist/mm/slab.c 2007-12-07 13:51:01.000000000 +0000
@@ -3252,8 +3252,7 @@ static void *fallback_alloc(struct kmem_
if (flags & __GFP_THISNODE)
return NULL;
- zonelist = &NODE_DATA(slab_node(current->mempolicy))
- ->node_zonelists[gfp_zone(flags)];
+ zonelist = node_zonelist(slab_node(current->mempolicy), flags);
local_flags = flags & (GFP_CONSTRAINT_MASK|GFP_RECLAIM_MASK);
retry:
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.24-rc4-mm1-005_freepages_zonelist/mm/slub.c linux-2.6.24-rc4-mm1-007_node_zonelist/mm/slub.c
--- linux-2.6.24-rc4-mm1-005_freepages_zonelist/mm/slub.c 2007-12-07 12:14:07.000000000 +0000
+++ linux-2.6.24-rc4-mm1-007_node_zonelist/mm/slub.c 2007-12-07 13:51:01.000000000 +0000
@@ -1349,8 +1349,7 @@ static unsigned long get_any_partial(str
get_cycles() % 1024 > s->remote_node_defrag_ratio)
return 0;
- zonelist = &NODE_DATA(slab_node(current->mempolicy))
- ->node_zonelists[gfp_zone(flags)];
+ zonelist = node_zonelist(slab_node(current->mempolicy), flags);
for (z = zonelist->zones; *z; z++) {
struct kmem_cache_node *n;
--
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