We don't track any random page allocation, so we shouldn't track kmalloc
that falls back to the page allocator.
Signed-off-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Glauber Costa <glommer@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
---
include/linux/slab.h | 2 +-
mm/memcontrol.c | 27 +--------------------------
mm/slub.c | 4 ++--
3 files changed, 4 insertions(+), 29 deletions(-)
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 3dd389aa91c7..8a928ff71d93 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -363,7 +363,7 @@ kmalloc_order(size_t size, gfp_t flags, unsigned int order)
{
void *ret;
- flags |= (__GFP_COMP | __GFP_KMEMCG);
+ flags |= __GFP_COMP;
ret = (void *) __get_free_pages(flags, order);
kmemleak_alloc(ret, size, 1, flags);
return ret;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index b4b6aef562fa..81a162d01d4d 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3528,35 +3528,10 @@ __memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **_memcg, int order)
*_memcg = NULL;
- /*
- * Disabling accounting is only relevant for some specific memcg
- * internal allocations. Therefore we would initially not have such
- * check here, since direct calls to the page allocator that are marked
- * with GFP_KMEMCG only happen outside memcg core. We are mostly
- * concerned with cache allocations, and by having this test at
- * memcg_kmem_get_cache, we are already able to relay the allocation to
- * the root cache and bypass the memcg cache altogether.
- *
- * There is one exception, though: the SLUB allocator does not create
- * large order caches, but rather service large kmallocs directly from
- * the page allocator. Therefore, the following sequence when backed by
- * the SLUB allocator:
- *
- * memcg_stop_kmem_account();
- * kmalloc(<large_number>)
- * memcg_resume_kmem_account();
- *
- * would effectively ignore the fact that we should skip accounting,
- * since it will drive us directly to this function without passing
- * through the cache selector memcg_kmem_get_cache. Such large
- * allocations are extremely rare but can happen, for instance, for the
- * cache arrays. We bring this test here.
- */
- if (!current->mm || current->memcg_kmem_skip_account)
+ if (!current->mm)
return true;
memcg = get_mem_cgroup_from_mm(current->mm);
-
if (!memcg_can_account_kmem(memcg)) {
css_put(&memcg->css);
return true;
diff --git a/mm/slub.c b/mm/slub.c
index 5e234f1f8853..c2e58a787443 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3325,7 +3325,7 @@ static void *kmalloc_large_node(size_t size, gfp_t flags, int node)
struct page *page;
void *ptr = NULL;
- flags |= __GFP_COMP | __GFP_NOTRACK | __GFP_KMEMCG;
+ flags |= __GFP_COMP | __GFP_NOTRACK;
page = alloc_pages_node(node, flags, get_order(size));
if (page)
ptr = page_address(page);
@@ -3395,7 +3395,7 @@ void kfree(const void *x)
if (unlikely(!PageSlab(page))) {
BUG_ON(!PageCompound(page));
kfree_hook(x);
- __free_memcg_kmem_pages(page, compound_order(page));
+ __free_pages(page, compound_order(page));
return;
}
slab_free(page->slab_cache, page, object, _RET_IP_);
--
1.7.10.4
--
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