+ mm-slab-drain-the-free-slab-as-much-as-possible.patch added to -mm tree

* + mm-slab-drain-the-free-slab-as-much-as-possible.patch added to -mm tree
@ 2016-03-28 21:22 akpm
  0 siblings, 0 replies; 2+ messages in thread
From: akpm @ 2016-03-28 21:22 UTC (permalink / raw)
  To: iamjoonsoo.kim, brouer, cl, penberg, rientjes, mm-commits


The patch titled
     Subject: mm/slab: drain the free slab as much as possible
has been added to the -mm tree.  Its filename is
     mm-slab-drain-the-free-slab-as-much-as-possible.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-slab-drain-the-free-slab-as-much-as-possible.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-slab-drain-the-free-slab-as-much-as-possible.patch

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------------------------------------------------------
From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: 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>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/slab.c |   12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff -puN mm/slab.c~mm-slab-drain-the-free-slab-as-much-as-possible mm/slab.c

--- a/mm/slab.c~mm-slab-drain-the-free-slab-as-much-as-possible
+++ a/mm/slab.c
@@ -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_no
 		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)) {
@@ -2287,7 +2281,7 @@ int __kmem_cache_shrink(struct kmem_cach
 
 	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);
_

Patches currently in -mm which might be from iamjoonsoo.kim@lge.com are

mm-page_ref-use-page_ref-helper-instead-of-direct-modification-of-_count.patch
mm-rename-_count-field-of-the-struct-page-to-_refcount.patch
mm-slab-hold-a-slab_mutex-when-calling-__kmem_cache_shrink.patch
mm-slab-remove-bad_alien_magic-again.patch
mm-slab-drain-the-free-slab-as-much-as-possible.patch
mm-slab-factor-out-kmem_cache_node-initialization-code.patch
mm-slab-clean-up-kmem_cache_node-setup.patch
mm-slab-dont-keep-free-slabs-if-free_objects-exceeds-free_limit.patch
mm-slab-racy-access-modify-the-slab-color.patch
mm-slab-make-cache_grow-handle-the-page-allocated-on-arbitrary-node.patch
mm-slab-separate-cache_grow-to-two-parts.patch
mm-slab-refill-cpu-cache-through-a-new-slab-without-holding-a-node-lock.patch
mm-slab-lockless-decision-to-grow-cache.patch


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