linux-kernel - [PATCH 5/8] mm: memcontrol: separate kmem code from legacy tcp accounting code

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue,  8 Dec 2015 13:34:22 -0500
From:	Johannes Weiner <hannes@...xchg.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Michal Hocko <mhocko@...e.cz>,
	Vladimir Davydov <vdavydov@...tuozzo.com>, linux-mm@...ck.org,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-team@...com
Subject: [PATCH 5/8] mm: memcontrol: separate kmem code from legacy tcp accounting code

The cgroup2 memory controller will include important in-kernel memory
consumers per default, including socket memory, but it will no longer
carry the historic tcp control interface.

Separate the kmem state init from the tcp control interface init in
preparation for that.

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
---
 mm/memcontrol.c | 33 ++++++++++++---------------------
 1 file changed, 12 insertions(+), 21 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5118618..55a3f07 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2925,17 +2925,6 @@ static int memcg_propagate_kmem(struct mem_cgroup *memcg)
 	return ret;
 }
 
-static int memcg_init_kmem(struct mem_cgroup *memcg)
-{
-	int ret;
-
-	ret = memcg_propagate_kmem(memcg);
-	if (ret)
-		return ret;
-
-	return tcp_init_cgroup(memcg);
-}
-
 static void memcg_offline_kmem(struct mem_cgroup *memcg)
 {
 	struct cgroup_subsys_state *css;
@@ -2988,7 +2977,6 @@ static void memcg_free_kmem(struct mem_cgroup *memcg)
 		static_branch_dec(&memcg_kmem_enabled_key);
 		WARN_ON(page_counter_read(&memcg->kmem));
 	}
-	tcp_destroy_cgroup(memcg);
 }
 #else
 static int memcg_update_kmem_limit(struct mem_cgroup *memcg,
@@ -2996,16 +2984,9 @@ static int memcg_update_kmem_limit(struct mem_cgroup *memcg,
 {
 	return -EINVAL;
 }
-static int memcg_init_kmem(struct mem_cgroup *memcg)
-{
-	return 0;
-}
 static void memcg_offline_kmem(struct mem_cgroup *memcg)
 {
 }
-static void memcg_free_kmem(struct mem_cgroup *memcg)
-{
-}
 #endif /* CONFIG_MEMCG_KMEM */
 
 /*
@@ -4241,9 +4222,14 @@ mem_cgroup_css_online(struct cgroup_subsys_state *css)
 	}
 	mutex_unlock(&memcg_create_mutex);
 
-	ret = memcg_init_kmem(memcg);
+#ifdef CONFIG_MEMCG_KMEM
+	ret = memcg_propagate_kmem(memcg);
 	if (ret)
 		return ret;
+	ret = tcp_init_cgroup(memcg);
+	if (ret)
+		return ret;
+#endif
 
 #ifdef CONFIG_INET
 	if (cgroup_subsys_on_dfl(memory_cgrp_subsys) && !cgroup_memory_nosocket)
@@ -4288,11 +4274,16 @@ static void mem_cgroup_css_free(struct cgroup_subsys_state *css)
 {
 	struct mem_cgroup *memcg = mem_cgroup_from_css(css);
 
-	memcg_free_kmem(memcg);
 #ifdef CONFIG_INET
 	if (cgroup_subsys_on_dfl(memory_cgrp_subsys) && !cgroup_memory_nosocket)
 		static_branch_dec(&memcg_sockets_enabled_key);
 #endif
+
+#ifdef CONFIG_MEMCG_KMEM
+	memcg_free_kmem(memcg);
+	tcp_destroy_cgroup(memcg);
+#endif
+
 	__mem_cgroup_free(memcg);
 }
 
-- 
2.6.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/