linux-kernel - [PATCH 6/6] mm: memcontrol: account slab stats per lruvec

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Date:   Tue, 30 May 2017 14:17:24 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Josef Bacik <josef@...icpanda.com>
Cc:     Michal Hocko <mhocko@...e.com>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Rik van Riel <riel@...hat.com>, linux-mm@...ck.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com
Subject: [PATCH 6/6] mm: memcontrol: account slab stats per lruvec

Josef's redesign of the balancing between slab caches and the page
cache requires slab cache statistics at the lruvec level.

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
---
 mm/slab.c | 12 ++++--------
 mm/slab.h | 18 +-----------------
 mm/slub.c |  4 ++--
 3 files changed, 7 insertions(+), 27 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index b55853399559..908908aa8250 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1425,11 +1425,9 @@ static struct page *kmem_getpages(struct kmem_cache *cachep, gfp_t flags,
 
 	nr_pages = (1 << cachep->gfporder);
 	if (cachep->flags & SLAB_RECLAIM_ACCOUNT)
-		add_node_page_state(page_pgdat(page),
-			NR_SLAB_RECLAIMABLE, nr_pages);
+		mod_lruvec_page_state(page, NR_SLAB_RECLAIMABLE, nr_pages);
 	else
-		add_node_page_state(page_pgdat(page),
-			NR_SLAB_UNRECLAIMABLE, nr_pages);
+		mod_lruvec_page_state(page, NR_SLAB_UNRECLAIMABLE, nr_pages);
 
 	__SetPageSlab(page);
 	/* Record if ALLOC_NO_WATERMARKS was set when allocating the slab */
@@ -1459,11 +1457,9 @@ static void kmem_freepages(struct kmem_cache *cachep, struct page *page)
 	kmemcheck_free_shadow(page, order);
 
 	if (cachep->flags & SLAB_RECLAIM_ACCOUNT)
-		sub_node_page_state(page_pgdat(page),
-				NR_SLAB_RECLAIMABLE, nr_freed);
+		mod_lruvec_page_state(page, NR_SLAB_RECLAIMABLE, -nr_freed);
 	else
-		sub_node_page_state(page_pgdat(page),
-				NR_SLAB_UNRECLAIMABLE, nr_freed);
+		mod_lruvec_page_state(page, NR_SLAB_UNRECLAIMABLE, -nr_freed);
 
 	BUG_ON(!PageSlab(page));
 	__ClearPageSlabPfmemalloc(page);
diff --git a/mm/slab.h b/mm/slab.h
index 7b84e3839dfe..6885e1192ec5 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -274,22 +274,11 @@ static __always_inline int memcg_charge_slab(struct page *page,
 					     gfp_t gfp, int order,
 					     struct kmem_cache *s)
 {
-	int ret;
-
 	if (!memcg_kmem_enabled())
 		return 0;
 	if (is_root_cache(s))
 		return 0;
-
-	ret = memcg_kmem_charge_memcg(page, gfp, order, s->memcg_params.memcg);
-	if (ret)
-		return ret;
-
-	mod_memcg_page_state(page,
-			     (s->flags & SLAB_RECLAIM_ACCOUNT) ?
-			     NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
-			     1 << order);
-	return 0;
+	return memcg_kmem_charge_memcg(page, gfp, order, s->memcg_params.memcg);
 }
 
 static __always_inline void memcg_uncharge_slab(struct page *page, int order,
@@ -297,11 +286,6 @@ static __always_inline void memcg_uncharge_slab(struct page *page, int order,
 {
 	if (!memcg_kmem_enabled())
 		return;
-
-	mod_memcg_page_state(page,
-			     (s->flags & SLAB_RECLAIM_ACCOUNT) ?
-			     NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
-			     -(1 << order));
 	memcg_kmem_uncharge(page, order);
 }
 
diff --git a/mm/slub.c b/mm/slub.c
index 673e72698d9b..edaf102284e8 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1615,7 +1615,7 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
 	if (!page)
 		return NULL;
 
-	mod_node_page_state(page_pgdat(page),
+	mod_lruvec_page_state(page,
 		(s->flags & SLAB_RECLAIM_ACCOUNT) ?
 		NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
 		1 << oo_order(oo));
@@ -1655,7 +1655,7 @@ static void __free_slab(struct kmem_cache *s, struct page *page)
 
 	kmemcheck_free_shadow(page, compound_order(page));
 
-	mod_node_page_state(page_pgdat(page),
+	mod_lruvec_page_state(page,
 		(s->flags & SLAB_RECLAIM_ACCOUNT) ?
 		NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
 		-pages);
-- 
2.12.2