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slub: pass kmem_cache_cpu pointer to get_partial()

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Pass the kmem_cache_cpu pointer to get_partial(). That way
we can avoid the this_cpu_write() statements.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Christoph Lameter 2011-08-09 16:12:25 -05:00 committed by Pekka Enberg
parent e6e82ea112
commit acd19fd1a7
1 changed files with 15 additions and 15 deletions
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30
mm/slub.c
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@ -1557,7 +1557,8 @@ static inline void remove_partial(struct kmem_cache_node *n,
* Must hold list_lock.
*/
static inline int acquire_slab(struct kmem_cache *s,
struct kmem_cache_node *n, struct page *page)
struct kmem_cache_node *n, struct page *page,
struct kmem_cache_cpu *c)
{
void *freelist;
unsigned long counters;
@ -1586,9 +1587,9 @@ static inline int acquire_slab(struct kmem_cache *s,
if (freelist) {
/* Populate the per cpu freelist */
this_cpu_write(s->cpu_slab->freelist, freelist);
this_cpu_write(s->cpu_slab->page, page);
this_cpu_write(s->cpu_slab->node, page_to_nid(page));
c->freelist = freelist;
c->page = page;
c->node = page_to_nid(page);
return 1;
} else {
/*
@ -1606,7 +1607,7 @@ static inline int acquire_slab(struct kmem_cache *s,
* Try to allocate a partial slab from a specific node.
*/
static struct page *get_partial_node(struct kmem_cache *s,
struct kmem_cache_node *n)
struct kmem_cache_node *n, struct kmem_cache_cpu *c)
{
struct page *page;
@ -1621,7 +1622,7 @@ static struct page *get_partial_node(struct kmem_cache *s,
spin_lock(&n->list_lock);
list_for_each_entry(page, &n->partial, lru)
if (acquire_slab(s, n, page))
if (acquire_slab(s, n, page, c))
goto out;
page = NULL;
out:
@ -1632,7 +1633,8 @@ static struct page *get_partial_node(struct kmem_cache *s,
/*
* Get a page from somewhere. Search in increasing NUMA distances.
*/
static struct page *get_any_partial(struct kmem_cache *s, gfp_t flags)
static struct page *get_any_partial(struct kmem_cache *s, gfp_t flags,
struct kmem_cache_cpu *c)
{
#ifdef CONFIG_NUMA
struct zonelist *zonelist;
@ -1672,7 +1674,7 @@ static struct page *get_any_partial(struct kmem_cache *s, gfp_t flags)
if (n && cpuset_zone_allowed_hardwall(zone, flags) &&
n->nr_partial > s->min_partial) {
page = get_partial_node(s, n);
page = get_partial_node(s, n, c);
if (page) {
put_mems_allowed();
return page;
@ -1687,16 +1689,17 @@ static struct page *get_any_partial(struct kmem_cache *s, gfp_t flags)
/*
* Get a partial page, lock it and return it.
*/
static struct page *get_partial(struct kmem_cache *s, gfp_t flags, int node)
static struct page *get_partial(struct kmem_cache *s, gfp_t flags, int node,
struct kmem_cache_cpu *c)
{
struct page *page;
int searchnode = (node == NUMA_NO_NODE) ? numa_node_id() : node;
page = get_partial_node(s, get_node(s, searchnode));
page = get_partial_node(s, get_node(s, searchnode), c);
if (page || node != NUMA_NO_NODE)
return page;
return get_any_partial(s, flags);
return get_any_partial(s, flags, c);
}
#ifdef CONFIG_PREEMPT
@ -1765,9 +1768,6 @@ void init_kmem_cache_cpus(struct kmem_cache *s)
for_each_possible_cpu(cpu)
per_cpu_ptr(s->cpu_slab, cpu)->tid = init_tid(cpu);
}
/*
* Remove the cpu slab
*/
/*
* Remove the cpu slab
@ -2116,7 +2116,7 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
return object;
new_slab:
page = get_partial(s, gfpflags, node);
page = get_partial(s, gfpflags, node, c);
if (page) {
stat(s, ALLOC_FROM_PARTIAL);
object = c->freelist;