target/linux/brcm2708/patches-3.14/0027-config-Enable-CONFIG_MEMCG-but-leave-it-disabled-due.patch

   1 From 6f2dc468edc31cf2c9b2098566cbbcc1e59b5ad5 Mon Sep 17 00:00:00 2001
   2 From: popcornmix <popcornmix@gmail.com>
   3 Date: Wed, 18 Dec 2013 22:16:19 +0000
   4 Subject: [PATCH 27/54] config: Enable CONFIG_MEMCG, but leave it disabled (due
   5  to memory cost). Enable with cgroup_enable=memory.
   6
   7 ---
   8  arch/arm/configs/bcmrpi_defconfig |  1 +
   9  kernel/cgroup.c                   | 27 +++++++++++++++++++++++++++
  10  mm/memcontrol.c                   |  1 +
  11  3 files changed, 29 insertions(+)
  12
  13 --- a/arch/arm/configs/bcmrpi_defconfig
  14 +++ b/arch/arm/configs/bcmrpi_defconfig
  15 @@ -18,6 +18,7 @@ CONFIG_CGROUP_FREEZER=y
  16  CONFIG_CGROUP_DEVICE=y
  17  CONFIG_CGROUP_CPUACCT=y
  18  CONFIG_RESOURCE_COUNTERS=y
  19 +CONFIG_MEMCG=y
  20  CONFIG_BLK_CGROUP=y
  21  CONFIG_NAMESPACES=y
  22  CONFIG_SCHED_AUTOGROUP=y
  23 --- a/kernel/cgroup.c
  24 +++ b/kernel/cgroup.c
  25 @@ -5251,6 +5251,33 @@ static int __init cgroup_disable(char *s
  26  }
  27  __setup("cgroup_disable=", cgroup_disable);
  28
  29 +static int __init cgroup_enable(char *str)
  30 +{
  31 +       struct cgroup_subsys *ss;
  32 +       char *token;
  33 +       int i;
  34 +
  35 +       while ((token = strsep(&str, ",")) != NULL) {
  36 +               if (!*token)
  37 +                       continue;
  38 +
  39 +               /*
  40 +                * cgroup_disable, being at boot time, can't know about
  41 +                * module subsystems, so we don't worry about them.
  42 +                */
  43 +               for_each_builtin_subsys(ss, i) {
  44 +                       if (!strcmp(token, ss->name)) {
  45 +                               ss->disabled = 0;
  46 +                               printk(KERN_INFO "Disabling %s control group"
  47 +                                       " subsystem\n", ss->name);
  48 +                               break;
  49 +                       }
  50 +               }
  51 +       }
  52 +       return 1;
  53 +}
  54 +__setup("cgroup_enable=", cgroup_enable);
  55 +
  56  /**
  57   * css_from_dir - get corresponding css from the dentry of a cgroup dir
  58   * @dentry: directory dentry of interest
  59 --- a/mm/memcontrol.c
  60 +++ b/mm/memcontrol.c
  61 @@ -7316,6 +7316,7 @@ struct cgroup_subsys mem_cgroup_subsys =
  62         .bind = mem_cgroup_bind,
  63         .base_cftypes = mem_cgroup_files,
  64         .early_init = 0,
  65 +       .disabled = 1,
  66  };
  67
  68  #ifdef CONFIG_MEMCG_SWAP