target/linux/brcm2708/patches-3.10/0128-config-Enable-CONFIG_MEMCG-but-leave-it-disabled-due.patch

   1 From 7793e8e7ab80fb41381652e46dbfe29dae3d7eea 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 128/174] config: Enable CONFIG_MEMCG, but leave it disabled
   5  (due to memory cost). Enable with cgroup_enable=memory.
   6
   7 ---
   8  arch/arm/configs/bcmrpi_defconfig |  1 +
   9  kernel/cgroup.c                   | 31 +++++++++++++++++++++++++++++++
  10  mm/memcontrol.c                   |  1 +
  11  3 files changed, 33 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 @@ -5127,6 +5127,37 @@ 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 +       int i;
  32 +       char *token;
  33 +
  34 +       while ((token = strsep(&str, ",")) != NULL) {
  35 +               if (!*token)
  36 +                       continue;
  37 +               for (i = 0; i < CGROUP_SUBSYS_COUNT; i++) {
  38 +                       struct cgroup_subsys *ss = subsys[i];
  39 +
  40 +                       /*
  41 +                        * cgroup_enable, being at boot time, can't
  42 +                        * know about module subsystems, so we don't
  43 +                        * worry about them.
  44 +                        */
  45 +                       if (!ss || ss->module)
  46 +                               continue;
  47 +
  48 +                       if (!strcmp(token, ss->name)) {
  49 +                               ss->disabled = 0;
  50 +                               printk(KERN_INFO "Enabling %s control group"
  51 +                                       " subsystem\n", ss->name);
  52 +                               break;
  53 +                       }
  54 +               }
  55 +       }
  56 +       return 1;
  57 +}
  58 +__setup("cgroup_enable=", cgroup_enable);
  59 +
  60  /*
  61   * Functons for CSS ID.
  62   */
  63 --- a/mm/memcontrol.c
  64 +++ b/mm/memcontrol.c
  65 @@ -6956,6 +6956,7 @@ struct cgroup_subsys mem_cgroup_subsys =
  66         .base_cftypes = mem_cgroup_files,
  67         .early_init = 0,
  68         .use_id = 1,
  69 +       .disabled = 1,
  70  };
  71
  72  #ifdef CONFIG_MEMCG_SWAP