openwrtv4/target/linux/brcm2708/patches-4.1/0033-config-Enable-CONFIG_MEMCG-but-leave-it-disabled-due.patch

From 392071fc3afa61f49617e9f5386f128ebd47e18e Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Wed, 18 Dec 2013 22:16:19 +0000
Subject: [PATCH 033/222] config: Enable CONFIG_MEMCG, but leave it disabled
 (due to memory cost). Enable with cgroup_enable=memory.

---
 kernel/cgroup.c | 23 +++++++++++++++++++++++
 mm/memcontrol.c |  1 +
 2 files changed, 24 insertions(+)

--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -5394,6 +5394,29 @@ static int __init cgroup_disable(char *s
 }
 __setup("cgroup_disable=", cgroup_disable);
 
+static int __init cgroup_enable(char *str)
+{
+	struct cgroup_subsys *ss;
+	char *token;
+	int i;
+
+	while ((token = strsep(&str, ",")) != NULL) {
+		if (!*token)
+			continue;
+
+		for_each_subsys(ss, i) {
+			if (!strcmp(token, ss->name)) {
+				ss->disabled = 0;
+				printk(KERN_INFO "Enabling %s control group"
+					" subsystem\n", ss->name);
+				break;
+			}
+		}
+	}
+	return 1;
+}
+__setup("cgroup_enable=", cgroup_enable);
+
 static int __init cgroup_set_legacy_files_on_dfl(char *str)
 {
 	printk("cgroup: using legacy files on the default hierarchy\n");
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5389,6 +5389,7 @@ struct cgroup_subsys memory_cgrp_subsys
 	.dfl_cftypes = memory_files,
 	.legacy_cftypes = mem_cgroup_legacy_files,
 	.early_init = 0,
+        .disabled = 1,
 };
 
 /**