linux-kernel - [PATCH 5/6] mm: memcontrol: push down mem_cgroup_nr_lru

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Date:   Fri, 15 Feb 2019 13:14:24 -0500
From:   Johannes Weiner <hannes@...xchg.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Tejun Heo <tj@...nel.org>, linux-mm@...ck.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com
Subject: [PATCH 5/6] mm: memcontrol: push down mem_cgroup_nr_lru_pages()

mem_cgroup_nr_lru_pages() is just a convenience wrapper around
memcg_page_state() that takes bitmasks of lru indexes and aggregates
the counts for those.

Replace callsites where the bitmask is simple enough with direct
memcg_page_state() call(s).

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
---
 mm/memcontrol.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 73eb8333bc73..6d0c3374669f 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1354,7 +1354,7 @@ void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg)
 
 		for (i = 0; i < NR_LRU_LISTS; i++)
 			pr_cont(" %s:%luKB", mem_cgroup_lru_names[i],
-				K(mem_cgroup_nr_lru_pages(iter, BIT(i))));
+				K(memcg_page_state(iter, NR_LRU_BASE + i)));
 
 		pr_cont("\n");
 	}
@@ -2987,8 +2987,8 @@ static void accumulate_memcg_tree(struct mem_cgroup *memcg,
 				acc->events_array ? acc->events_array[i] : i);
 
 		for (i = 0; i < NR_LRU_LISTS; i++)
-			acc->lru_pages[i] +=
-				mem_cgroup_nr_lru_pages(mi, BIT(i));
+			acc->lru_pages[i] += memcg_page_state(mi,
+							      NR_LRU_BASE + i);
 	}
 }
 
@@ -3418,7 +3418,8 @@ static int memcg_stat_show(struct seq_file *m, void *v)
 
 	for (i = 0; i < NR_LRU_LISTS; i++)
 		seq_printf(m, "%s %lu\n", mem_cgroup_lru_names[i],
-			   mem_cgroup_nr_lru_pages(memcg, BIT(i)) * PAGE_SIZE);
+			   memcg_page_state(memcg, NR_LRU_BASE + i) *
+			   PAGE_SIZE);
 
 	/* Hierarchical information */
 	memory = memsw = PAGE_COUNTER_MAX;
@@ -3909,8 +3910,8 @@ void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
 
 	/* this should eventually include NR_UNSTABLE_NFS */
 	*pwriteback = memcg_page_state(memcg, NR_WRITEBACK);
-	*pfilepages = mem_cgroup_nr_lru_pages(memcg, (1 << LRU_INACTIVE_FILE) |
-						     (1 << LRU_ACTIVE_FILE));
+	*pfilepages = memcg_page_state(memcg, NR_INACTIVE_FILE) +
+		memcg_page_state(memcg, NR_ACTIVE_FILE);
 	*pheadroom = PAGE_COUNTER_MAX;
 
 	while ((parent = parent_mem_cgroup(memcg))) {
-- 
2.20.1