mm: move page->mem_cgroup bad page handling into generic code

Now that the external page_cgroup data structure and its lookup is
gone, let the generic bad_page() check for page->mem_cgroup sanity.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Tejun Heo <tj@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 12 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 46768752130d..7e9fbd48e2ab 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -983,18 +983,6 @@ config MEMCG
           Provides a memory resource controller that manages both anonymous
           memory and page cache. (See Documentation/cgroups/memory.txt)
 
-          Note that setting this option increases fixed memory overhead
-          associated with each page of memory in the system. By this,
-          8(16)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. 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 controller)
-
 config MEMCG_SWAP
         bool "Memory Resource Controller Swap Extension"
         depends on MEMCG && SWAP