[PATCH v6 2/5] mm: access zone->node via zone_to_nid() and zone_set_nid()
From: <hidden>
Date: 2018-08-01 12:24:03
Also in:
lkml
Subsystem:
memblock and memory management initialization, memory management, memory management - core, memory management - memory policy and migration, memory management - mglru (multi-gen lru), memory management - page allocator, the rest · Maintainers:
Mike Rapoport, Andrew Morton, David Hildenbrand, Vlastimil Babka, Linus Torvalds
From: Pavel Tatashin <redacted> 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. Signed-off-by: Pavel Tatashin <redacted> Signed-off-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Oscar Salvador <osalvador@suse.de> Acked-by: Michal Hocko <mhocko@suse.com> --- include/linux/mm.h | 9 --------- include/linux/mmzone.h | 26 ++++++++++++++++++++------ mm/mempolicy.c | 4 ++-- mm/mm_init.c | 9 ++------- mm/page_alloc.c | 10 ++++------ 5 files changed, 28 insertions(+), 30 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 644c6329336b..70edbc3f21a8 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -957,15 +957,6 @@ 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
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 83b1d11e90eb..805b990b27ab 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h@@ -841,6 +841,25 @@ 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
@@ -956,12 +975,7 @@ 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,
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 4861ba738d6f..da858f794eb6 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c@@ -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:
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 5b72266b4b03..6838a530789b 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c@@ -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"); } }
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f5e36713c5d4..295977c6acae 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c@@ -2915,10 +2915,10 @@ 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);
@@ -5284,7 +5284,7 @@ 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
@@ -6301,9 +6301,7 @@ 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);
--
2.13.6