memcg: fix page_cgroup fatal error in FLATMEM
authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Fri, 12 Jun 2009 07:33:53 +0000 (10:33 +0300)
committerPekka Enberg <penberg@cs.helsinki.fi>
Fri, 12 Jun 2009 08:00:54 +0000 (11:00 +0300)
commitca371c0d7e23d0d0afae65fc83a0e91cf7399573
tree20ca26fbdceefe25d1c362dc23a2152c1aac8b4c
parent8ebf975608aaebd7feb33d77f07ba21a6380e086
memcg: fix page_cgroup fatal error in FLATMEM

Now, SLAB is configured in very early stage and it can be used in
init routine now.

But replacing alloc_bootmem() in FLAT/DISCONTIGMEM's page_cgroup()
initialization breaks the allocation, now.
(Works well in SPARSEMEM case...it supports MEMORY_HOTPLUG and
 size of page_cgroup is in reasonable size (< 1 << MAX_ORDER.)

This patch revive FLATMEM+memory cgroup by using alloc_bootmem.

In future,
We stop to support FLATMEM (if no users) or rewrite codes for flatmem
completely.But this will adds more messy codes and overheads.

Reported-by: Li Zefan <lizf@cn.fujitsu.com>
Tested-by: Li Zefan <lizf@cn.fujitsu.com>
Tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
include/linux/page_cgroup.h
init/main.c
mm/page_cgroup.c