[patch 102/108] mm: memcontrol: use the node-native slab memory counters

[patch 102/108] mm: memcontrol: use the node-native slab memory counters

[akpm]

From: Johannes Weiner <hannes@cmpxchg.org>
Subject: mm: memcontrol: use the node-native slab memory counters

Now that the slab counters are moved from the zone to the node level we
can drop the private memcg node stats and use the official ones.

Link: http://lkml.kernel.org/r/20170530181724.27197-4-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/memcontrol.h |    2 --
 mm/memcontrol.c            |    8 ++++----
 mm/slab.h                  |    4 ++--
 3 files changed, 6 insertions(+), 8 deletions(-)

diff -puN include/linux/memcontrol.h~mm-memcontrol-use-the-node-native-slab-memory-counters include/linux/memcontrol.h
--- a/include/linux/memcontrol.h~mm-memcontrol-use-the-node-native-slab-memory-counters
+++ a/include/linux/memcontrol.h
@@ -44,8 +44,6 @@ enum memcg_stat_item {
 	MEMCG_SOCK,
 	/* XXX: why are these zone and not node counters? */
 	MEMCG_KERNEL_STACK_KB,
-	MEMCG_SLAB_RECLAIMABLE,
-	MEMCG_SLAB_UNRECLAIMABLE,
 	MEMCG_NR_STAT,
 };
 
diff -puN mm/memcontrol.c~mm-memcontrol-use-the-node-native-slab-memory-counters mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-use-the-node-native-slab-memory-counters
+++ a/mm/memcontrol.c
@@ -5198,8 +5198,8 @@ static int memory_stat_show(struct seq_f
 	seq_printf(m, "kernel_stack %llu\n",
 		   (u64)stat[MEMCG_KERNEL_STACK_KB] * 1024);
 	seq_printf(m, "slab %llu\n",
-		   (u64)(stat[MEMCG_SLAB_RECLAIMABLE] +
-			 stat[MEMCG_SLAB_UNRECLAIMABLE]) * PAGE_SIZE);
+		   (u64)(stat[NR_SLAB_RECLAIMABLE] +
+			 stat[NR_SLAB_UNRECLAIMABLE]) * PAGE_SIZE);
 	seq_printf(m, "sock %llu\n",
 		   (u64)stat[MEMCG_SOCK] * PAGE_SIZE);
 
@@ -5223,9 +5223,9 @@ static int memory_stat_show(struct seq_f
 	}
 
 	seq_printf(m, "slab_reclaimable %llu\n",
-		   (u64)stat[MEMCG_SLAB_RECLAIMABLE] * PAGE_SIZE);
+		   (u64)stat[NR_SLAB_RECLAIMABLE] * PAGE_SIZE);
 	seq_printf(m, "slab_unreclaimable %llu\n",
-		   (u64)stat[MEMCG_SLAB_UNRECLAIMABLE] * PAGE_SIZE);
+		   (u64)stat[NR_SLAB_UNRECLAIMABLE] * PAGE_SIZE);
 
 	/* Accumulated memory events */
 
diff -puN mm/slab.h~mm-memcontrol-use-the-node-native-slab-memory-counters mm/slab.h
--- a/mm/slab.h~mm-memcontrol-use-the-node-native-slab-memory-counters
+++ a/mm/slab.h
@@ -287,7 +287,7 @@ static __always_inline int memcg_charge_
 
 	memcg_kmem_update_page_stat(page,
 			(s->flags & SLAB_RECLAIM_ACCOUNT) ?
-			MEMCG_SLAB_RECLAIMABLE : MEMCG_SLAB_UNRECLAIMABLE,
+			NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
 			1 << order);
 	return 0;
 }
@@ -300,7 +300,7 @@ static __always_inline void memcg_unchar
 
 	memcg_kmem_update_page_stat(page,
 			(s->flags & SLAB_RECLAIM_ACCOUNT) ?
-			MEMCG_SLAB_RECLAIMABLE : MEMCG_SLAB_UNRECLAIMABLE,
+			NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
 			-(1 << order));
 	memcg_kmem_uncharge(page, order);
 }
_