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mm/slub.c: run free_partial() outside of the kmem_cache_node->list_lock
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95144c78
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1/*
2 * linux/mm/mmzone.c
3 *
4468b8f1 4 * management codes for pgdats, zones and page flags
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5 */
6
7
95144c78 8#include <linux/stddef.h>
eb33575c 9#include <linux/mm.h>
95144c78 10#include <linux/mmzone.h>
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11
12struct pglist_data *first_online_pgdat(void)
13{
14 return NODE_DATA(first_online_node);
15}
16
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17struct pglist_data *next_online_pgdat(struct pglist_data *pgdat)
18{
19 int nid = next_online_node(pgdat->node_id);
20
21 if (nid == MAX_NUMNODES)
22 return NULL;
23 return NODE_DATA(nid);
24}
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25
26/*
27 * next_zone - helper magic for for_each_zone()
28 */
29struct zone *next_zone(struct zone *zone)
30{
31 pg_data_t *pgdat = zone->zone_pgdat;
32
33 if (zone < pgdat->node_zones + MAX_NR_ZONES - 1)
34 zone++;
35 else {
36 pgdat = next_online_pgdat(pgdat);
37 if (pgdat)
38 zone = pgdat->node_zones;
39 else
40 zone = NULL;
41 }
42 return zone;
43}
95144c78 44
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45static inline int zref_in_nodemask(struct zoneref *zref, nodemask_t *nodes)
46{
47#ifdef CONFIG_NUMA
48 return node_isset(zonelist_node_idx(zref), *nodes);
49#else
50 return 1;
51#endif /* CONFIG_NUMA */
52}
53
54/* Returns the next zone at or below highest_zoneidx in a zonelist */
682a3385 55struct zoneref *__next_zones_zonelist(struct zoneref *z,
19770b32 56 enum zone_type highest_zoneidx,
05891fb0 57 nodemask_t *nodes)
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58{
59 /*
60 * Find the next suitable zone to use for the allocation.
61 * Only filter based on nodemask if it's set
62 */
63 if (likely(nodes == NULL))
64 while (zonelist_zone_idx(z) > highest_zoneidx)
65 z++;
66 else
67 while (zonelist_zone_idx(z) > highest_zoneidx ||
68 (z->zone && !zref_in_nodemask(z, nodes)))
69 z++;
70
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71 return z;
72}
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73
74#ifdef CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
5b80287a 75bool memmap_valid_within(unsigned long pfn,
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76 struct page *page, struct zone *zone)
77{
78 if (page_to_pfn(page) != pfn)
5b80287a 79 return false;
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80
81 if (page_zone(page) != zone)
5b80287a 82 return false;
eb33575c 83
5b80287a 84 return true;
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85}
86#endif /* CONFIG_ARCH_HAS_HOLES_MEMORYMODEL */
7f5e86c2 87
bea8c150 88void lruvec_init(struct lruvec *lruvec)
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89{
90 enum lru_list lru;
91
92 memset(lruvec, 0, sizeof(struct lruvec));
93
94 for_each_lru(lru)
95 INIT_LIST_HEAD(&lruvec->lists[lru]);
7f5e86c2 96}
4468b8f1 97
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98#if defined(CONFIG_NUMA_BALANCING) && !defined(LAST_CPUPID_NOT_IN_PAGE_FLAGS)
99int page_cpupid_xchg_last(struct page *page, int cpupid)
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100{
101 unsigned long old_flags, flags;
90572890 102 int last_cpupid;
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103
104 do {
105 old_flags = flags = page->flags;
90572890 106 last_cpupid = page_cpupid_last(page);
4468b8f1 107
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108 flags &= ~(LAST_CPUPID_MASK << LAST_CPUPID_PGSHIFT);
109 flags |= (cpupid & LAST_CPUPID_MASK) << LAST_CPUPID_PGSHIFT;
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110 } while (unlikely(cmpxchg(&page->flags, old_flags, flags) != old_flags));
111
90572890 112 return last_cpupid;
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113}
114#endif