aboutsummaryrefslogtreecommitdiffstats
path: root/init
diff options
context:
space:
mode:
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig16
-rw-r--r--init/do_mounts_md.c3
2 files changed, 11 insertions, 8 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 44e9208f9c7..86b00c53fad 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -401,16 +401,20 @@ config CGROUP_MEM_RES_CTLR
depends on CGROUPS && RESOURCE_COUNTERS
select MM_OWNER
help
- Provides a memory resource controller that manages both page cache and
- RSS memory.
+ Provides a memory resource controller that manages both anonymous
+ memory and page cache. (See Documentation/controllers/memory.txt)
Note that setting this option increases fixed memory overhead
- associated with each page of memory in the system by 4/8 bytes
- and also increases cache misses because struct page on many 64bit
- systems will not fit into a single cache line anymore.
+ associated with each page of memory in the system. By this,
+ 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
+ usage tracking struct at boot. Total amount of this is printed out
+ at boot.
Only enable when you're ok with these trade offs and really
- sure you need the memory resource controller.
+ sure you need the memory resource controller. Even when you enable
+ this, you can set "cgroup_disable=memory" at your boot option to
+ disable memory resource controller and you can avoid overheads.
+ (and lose benefits of memory resource contoller)
This config option also selects MM_OWNER config option, which
could in turn add some fork/exit overhead.
diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c
index 4c87ee1fe5d..d6da5cdd3c3 100644
--- a/init/do_mounts_md.c
+++ b/init/do_mounts_md.c
@@ -1,6 +1,5 @@
-
-#include <linux/raid/md.h>
#include <linux/delay.h>
+#include <linux/raid/md.h>
#include "do_mounts.h"