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From 6f2dc468edc31cf2c9b2098566cbbcc1e59b5ad5 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Wed, 18 Dec 2013 22:16:19 +0000
Subject: [PATCH 27/54] config: Enable CONFIG_MEMCG, but leave it disabled (due
to memory cost). Enable with cgroup_enable=memory.
---
arch/arm/configs/bcmrpi_defconfig | 1 +
kernel/cgroup.c | 27 +++++++++++++++++++++++++++
mm/memcontrol.c | 1 +
3 files changed, 29 insertions(+)
diff --git a/arch/arm/configs/bcmrpi_defconfig b/arch/arm/configs/bcmrpi_defconfig
index 78d789c..e89e430 100644
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -18,6 +18,7 @@ CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
+CONFIG_MEMCG=y
CONFIG_BLK_CGROUP=y
CONFIG_NAMESPACES=y
CONFIG_SCHED_AUTOGROUP=y
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 0c753dd..a18b46e 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -5252,6 +5252,33 @@ static int __init cgroup_disable(char *str)
}
__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;
+
+ /*
+ * cgroup_disable, being at boot time, can't know about
+ * module subsystems, so we don't worry about them.
+ */
+ for_each_builtin_subsys(ss, i) {
+ if (!strcmp(token, ss->name)) {
+ ss->disabled = 0;
+ printk(KERN_INFO "Disabling %s control group"
+ " subsystem\n", ss->name);
+ break;
+ }
+ }
+ }
+ return 1;
+}
+__setup("cgroup_enable=", cgroup_enable);
+
/**
* css_from_dir - get corresponding css from the dentry of a cgroup dir
* @dentry: directory dentry of interest
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9b35da2..a9891cc 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -7289,6 +7289,7 @@ struct cgroup_subsys mem_cgroup_subsys = {
.bind = mem_cgroup_bind,
.base_cftypes = mem_cgroup_files,
.early_init = 0,
+ .disabled = 1,
};
#ifdef CONFIG_MEMCG_SWAP
--
1.9.1
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