Commit 7aa0d227 authored by Geliang Tang's avatar Geliang Tang Committed by Linus Torvalds

mm/slab.c: add a helper function get_first_slab

Add a new helper function get_first_slab() that get the first slab from
a kmem_cache_node.
Signed-off-by: 's avatarGeliang Tang <geliangtang@163.com>
Acked-by: 's avatarChristoph Lameter <cl@linux.com>
Acked-by: 's avatarDavid Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: 's avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 73c0219d
......@@ -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)
{
......@@ -2793,15 +2808,9 @@ retry:
while (batchcount > 0) {
struct page *page;
/* Get slab alloc is to come from. */
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);
if (!page)
goto must_grow;
}
page = get_first_slab(n);
if (!page)
goto must_grow;
check_spinlock_acquired(cachep);
......@@ -3097,15 +3106,9 @@ static void *____cache_alloc_node(struct kmem_cache *cachep, gfp_t flags,
retry:
check_irq_off();
spin_lock(&n->list_lock);
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);
if (!page)
goto must_grow;
}
page = get_first_slab(n);
if (!page)
goto must_grow;
check_spinlock_acquired_node(cachep, nodeid);
......
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