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>
diff --git a/init/main.c b/init/main.c
index 5616661..b3e8f14 100644
--- a/init/main.c
+++ b/init/main.c
@@ -539,6 +539,11 @@
*/
static void __init mm_init(void)
{
+ /*
+ * page_cgroup requires countinous pages as memmap
+ * and it's bigger than MAX_ORDER unless SPARSEMEM.
+ */
+ page_cgroup_init_flatmem();
mem_init();
kmem_cache_init();
vmalloc_init();