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mm: access zone->node via zone_to_nid() and zone_set_nid() 

zone->node is configured only when CONFIG_NUMA=y, so it is a good idea to
have inline functions to access this field in order to avoid ifdef's in c
files.

Link: http://lkml.kernel.org/r/20180730101757.28058-3-osalvador@techadventures.net
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Aaron Lu <aaron.lu@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Pasha Tatashin <Pavel.Tatashin@microsoft.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pavel Tatashin 2018-08-21 21:53:32 -07:00 committed by Linus Torvalds
parent ace1db3976
commit c1093b746c
5 changed files with 28 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
include/linux/mm.h
View File

@ -960,15 +960,6 @@ static inline int page_zone_id(struct page *page)
return (page->flags >> ZONEID_PGSHIFT) & ZONEID_MASK;
}
static inline int zone_to_nid(struct zone *zone)
{
#ifdef CONFIG_NUMA
return zone->node;
#else
return 0;
#endif
}
#ifdef NODE_NOT_IN_PAGE_FLAGS
extern int page_to_nid(const struct page *page);
#else

26
include/linux/mmzone.h
View File

@ -834,6 +834,25 @@ static inline bool populated_zone(struct zone *zone)
return zone->present_pages;
}
#ifdef CONFIG_NUMA
static inline int zone_to_nid(struct zone *zone)
{
return zone->node;
}
static inline void zone_set_nid(struct zone *zone, int nid)
{
zone->node = nid;
}
#else
static inline int zone_to_nid(struct zone *zone)
{
return 0;
}
static inline void zone_set_nid(struct zone *zone, int nid) {}
#endif
extern int movable_zone;
#ifdef CONFIG_HIGHMEM
@ -949,12 +968,7 @@ static inline int zonelist_zone_idx(struct zoneref *zoneref)
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 */
return zone_to_nid(zoneref->zone);
}
struct zoneref *__next_zones_zonelist(struct zoneref *z,

4
mm/mempolicy.c
View File

@ -1784,7 +1784,7 @@ unsigned int mempolicy_slab_node(void)
zonelist = &NODE_DATA(node)->node_zonelists[ZONELIST_FALLBACK];
z = first_zones_zonelist(zonelist, highest_zoneidx,
&policy->v.nodes);
return z->zone ? z->zone->node : node;
return z->zone ? zone_to_nid(z->zone) : node;
}
default:
@ -2326,7 +2326,7 @@ int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long
node_zonelist(numa_node_id(), GFP_HIGHUSER),
gfp_zone(GFP_HIGHUSER),
&pol->v.nodes);
polnid = z->zone->node;
polnid = zone_to_nid(z->zone);
break;
default:

9
mm/mm_init.c
View File

@ -53,13 +53,8 @@ void __init mminit_verify_zonelist(void)
zone->name);
/* Iterate the zonelist */
for_each_zone_zonelist(zone, z, zonelist, zoneid) {
#ifdef CONFIG_NUMA
pr_cont("%d:%s ", zone->node, zone->name);
#else
pr_cont("0:%s ", zone->name);
#endif /* CONFIG_NUMA */
}
for_each_zone_zonelist(zone, z, zonelist, zoneid)
pr_cont("%d:%s ", zone_to_nid(zone), zone->name);
pr_cont("\n");
}
}

10
mm/page_alloc.c
View File

@ -2909,10 +2909,10 @@ static inline void zone_statistics(struct zone *preferred_zone, struct zone *z)
if (!static_branch_likely(&vm_numa_stat_key))
return;
if (z->node != numa_node_id())
if (zone_to_nid(z) != numa_node_id())
local_stat = NUMA_OTHER;
if (z->node == preferred_zone->node)
if (zone_to_nid(z) == zone_to_nid(preferred_zone))
__inc_numa_state(z, NUMA_HIT);
else {
__inc_numa_state(z, NUMA_MISS);
@ -5278,7 +5278,7 @@ int local_memory_node(int node)
z = first_zones_zonelist(node_zonelist(node, GFP_KERNEL),
gfp_zone(GFP_KERNEL),
NULL);
return z->zone->node;
return zone_to_nid(z->zone);
}
#endif
@ -6299,9 +6299,7 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat)
* And all highmem pages will be managed by the buddy system.
*/
zone->managed_pages = freesize;
#ifdef CONFIG_NUMA
zone->node = nid;
#endif
zone_set_nid(zone, nid);
zone->name = zone_names[j];
zone->zone_pgdat = pgdat;
spin_lock_init(&zone->lock);