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mm/slab: drain the free slab as much as possible 

slabs_tofree() implies freeing all free slab.  We can do it with just
providing INT_MAX.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joonsoo Kim 2016-05-19 17:10:08 -07:00 committed by Linus Torvalds
parent 8888177ea1
commit a5aa63a5f7
1 changed files with 3 additions and 9 deletions
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12
mm/slab.c
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@ -895,12 +895,6 @@ static int init_cache_node_node(int node)
return 0;
}
static inline int slabs_tofree(struct kmem_cache *cachep,
struct kmem_cache_node *n)
{
return (n->free_objects + cachep->num - 1) / cachep->num;
}
static void cpuup_canceled(long cpu)
{
struct kmem_cache *cachep;
@ -965,7 +959,7 @@ free_slab:
n = get_node(cachep, node);
if (!n)
continue;
drain_freelist(cachep, n, slabs_tofree(cachep, n));
drain_freelist(cachep, n, INT_MAX);
}
}
@ -1117,7 +1111,7 @@ static int __meminit drain_cache_node_node(int node)
if (!n)
continue;
drain_freelist(cachep, n, slabs_tofree(cachep, n));
drain_freelist(cachep, n, INT_MAX);
if (!list_empty(&n->slabs_full) ||
!list_empty(&n->slabs_partial)) {
@ -2311,7 +2305,7 @@ int __kmem_cache_shrink(struct kmem_cache *cachep, bool deactivate)
check_irq_on();
for_each_kmem_cache_node(cachep, node, n) {
drain_freelist(cachep, n, slabs_tofree(cachep, n));
drain_freelist(cachep, n, INT_MAX);
ret += !list_empty(&n->slabs_full) ||
!list_empty(&n->slabs_partial);