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-rw-r--r--mm/huge_memory.c54
1 files changed, 9 insertions, 45 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index b5783d81eda9..9db521fa8e8a 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -20,6 +20,7 @@
#include <linux/mman.h>
#include <linux/pagemap.h>
#include <linux/migrate.h>
+#include <linux/hashtable.h>
#include <asm/tlb.h>
#include <asm/pgalloc.h>
@@ -62,12 +63,11 @@ static DECLARE_WAIT_QUEUE_HEAD(khugepaged_wait);
static unsigned int khugepaged_max_ptes_none __read_mostly = HPAGE_PMD_NR-1;
static int khugepaged(void *none);
-static int mm_slots_hash_init(void);
static int khugepaged_slab_init(void);
-static void khugepaged_slab_free(void);
-#define MM_SLOTS_HASH_HEADS 1024
-static struct hlist_head *mm_slots_hash __read_mostly;
+#define MM_SLOTS_HASH_BITS 10
+static __read_mostly DEFINE_HASHTABLE(mm_slots_hash, MM_SLOTS_HASH_BITS);
+
static struct kmem_cache *mm_slot_cache __read_mostly;
/**
@@ -634,12 +634,6 @@ static int __init hugepage_init(void)
if (err)
goto out;
- err = mm_slots_hash_init();
- if (err) {
- khugepaged_slab_free();
- goto out;
- }
-
register_shrinker(&huge_zero_page_shrinker);
/*
@@ -1908,12 +1902,6 @@ static int __init khugepaged_slab_init(void)
return 0;
}
-static void __init khugepaged_slab_free(void)
-{
- kmem_cache_destroy(mm_slot_cache);
- mm_slot_cache = NULL;
-}
-
static inline struct mm_slot *alloc_mm_slot(void)
{
if (!mm_slot_cache) /* initialization failed */
@@ -1926,47 +1914,23 @@ static inline void free_mm_slot(struct mm_slot *mm_slot)
kmem_cache_free(mm_slot_cache, mm_slot);
}
-static int __init mm_slots_hash_init(void)
-{
- mm_slots_hash = kzalloc(MM_SLOTS_HASH_HEADS * sizeof(struct hlist_head),
- GFP_KERNEL);
- if (!mm_slots_hash)
- return -ENOMEM;
- return 0;
-}
-
-#if 0
-static void __init mm_slots_hash_free(void)
-{
- kfree(mm_slots_hash);
- mm_slots_hash = NULL;
-}
-#endif
-
static struct mm_slot *get_mm_slot(struct mm_struct *mm)
{
struct mm_slot *mm_slot;
- struct hlist_head *bucket;
struct hlist_node *node;
- bucket = &mm_slots_hash[((unsigned long)mm / sizeof(struct mm_struct))
- % MM_SLOTS_HASH_HEADS];
- hlist_for_each_entry(mm_slot, node, bucket, hash) {
+ hash_for_each_possible(mm_slots_hash, mm_slot, node, hash, (unsigned long)mm)
if (mm == mm_slot->mm)
return mm_slot;
- }
+
return NULL;
}
static void insert_to_mm_slots_hash(struct mm_struct *mm,
struct mm_slot *mm_slot)
{
- struct hlist_head *bucket;
-
- bucket = &mm_slots_hash[((unsigned long)mm / sizeof(struct mm_struct))
- % MM_SLOTS_HASH_HEADS];
mm_slot->mm = mm;
- hlist_add_head(&mm_slot->hash, bucket);
+ hash_add(mm_slots_hash, &mm_slot->hash, (long)mm);
}
static inline int khugepaged_test_exit(struct mm_struct *mm)
@@ -2035,7 +1999,7 @@ void __khugepaged_exit(struct mm_struct *mm)
spin_lock(&khugepaged_mm_lock);
mm_slot = get_mm_slot(mm);
if (mm_slot && khugepaged_scan.mm_slot != mm_slot) {
- hlist_del(&mm_slot->hash);
+ hash_del(&mm_slot->hash);
list_del(&mm_slot->mm_node);
free = 1;
}
@@ -2484,7 +2448,7 @@ static void collect_mm_slot(struct mm_slot *mm_slot)
if (khugepaged_test_exit(mm)) {
/* free mm_slot */
- hlist_del(&mm_slot->hash);
+ hash_del(&mm_slot->hash);
list_del(&mm_slot->mm_node);
/*