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From d8fe940fffef38e498beaa5bd182647452d98de9 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Wed, 18 Dec 2013 22:16:19 +0000
Subject: [PATCH] config: Enable CONFIG_MEMCG, but leave it disabled (due to
memory cost). Enable with cgroup_enable=memory.
---
kernel/cgroup.c | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -5626,7 +5626,7 @@ int __init cgroup_init_early(void)
return 0;
}
-static u16 cgroup_disable_mask __initdata;
+static u16 cgroup_disable_mask __initdata = 1<<0;
/**
* cgroup_init - cgroup initialization
@@ -6163,6 +6163,28 @@ static int __init cgroup_no_v1(char *str
}
__setup("cgroup_no_v1=", cgroup_no_v1);
+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) &&
+ strcmp(token, ss->legacy_name))
+ continue;
+
+ cgroup_disable_mask &= ~(1 << i);
+ }
+ }
+ return 1;
+}
+__setup("cgroup_enable=", cgroup_enable);
+
/**
* css_tryget_online_from_dir - get corresponding css from a cgroup dentry
* @dentry: directory dentry of interest
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