summaryrefslogtreecommitdiff
path: root/mm/slab.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/slab.c')
-rw-r--r--mm/slab.c48
1 files changed, 23 insertions, 25 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 4765c97ce690..6ecc697a8bc4 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2756,6 +2756,21 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
#define cache_free_debugcheck(x,objp,z) (objp)
#endif
+static struct page *get_first_slab(struct kmem_cache_node *n)
+{
+ struct page *page;
+
+ page = list_first_entry_or_null(&n->slabs_partial,
+ struct page, lru);
+ if (!page) {
+ n->free_touched = 1;
+ page = list_first_entry_or_null(&n->slabs_free,
+ struct page, lru);
+ }
+
+ return page;
+}
+
static void *cache_alloc_refill(struct kmem_cache *cachep, gfp_t flags,
bool force_refill)
{
@@ -2791,18 +2806,12 @@ retry:
}
while (batchcount > 0) {
- struct list_head *entry;
struct page *page;
/* Get slab alloc is to come from. */
- entry = n->slabs_partial.next;
- if (entry == &n->slabs_partial) {
- n->free_touched = 1;
- entry = n->slabs_free.next;
- if (entry == &n->slabs_free)
- goto must_grow;
- }
+ page = get_first_slab(n);
+ if (!page)
+ goto must_grow;
- page = list_entry(entry, struct page, lru);
check_spinlock_acquired(cachep);
/*
@@ -3085,7 +3094,6 @@ retry:
static void *____cache_alloc_node(struct kmem_cache *cachep, gfp_t flags,
int nodeid)
{
- struct list_head *entry;
struct page *page;
struct kmem_cache_node *n;
void *obj;
@@ -3098,15 +3106,10 @@ static void *____cache_alloc_node(struct kmem_cache *cachep, gfp_t flags,
retry:
check_irq_off();
spin_lock(&n->list_lock);
- entry = n->slabs_partial.next;
- if (entry == &n->slabs_partial) {
- n->free_touched = 1;
- entry = n->slabs_free.next;
- if (entry == &n->slabs_free)
- goto must_grow;
- }
+ page = get_first_slab(n);
+ if (!page)
+ goto must_grow;
- page = list_entry(entry, struct page, lru);
check_spinlock_acquired_node(cachep, nodeid);
STATS_INC_NODEALLOCS(cachep);
@@ -3338,17 +3341,12 @@ free_done:
#if STATS
{
int i = 0;
- struct list_head *p;
-
- p = n->slabs_free.next;
- while (p != &(n->slabs_free)) {
- struct page *page;
+ struct page *page;
- page = list_entry(p, struct page, lru);
+ list_for_each_entry(page, &n->slabs_free, lru) {
BUG_ON(page->active);
i++;
- p = p->next;
}
STATS_SET_FREEABLE(cachep, i);
}