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memcg: fix page_cgroup fatal error in FLATMEM

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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>
This commit is contained in:
KAMEZAWA Hiroyuki 2009-06-12 10:33:53 +03:00 • committed by Pekka Enberg
parent 8ebf975608
commit ca371c0d7e
3 changed files with 32 additions and 20 deletions
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18
include/linux/page_cgroup.h
View file

@ -18,7 +18,19 @@ struct page_cgroup {
};
void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat);
void __init page_cgroup_init(void);
#ifdef CONFIG_SPARSEMEM
static inline void __init page_cgroup_init_flatmem(void)
{
}
extern void __init page_cgroup_init(void);
#else
void __init page_cgroup_init_flatmem(void);
static inline void __init page_cgroup_init(void)
{
}
#endif
struct page_cgroup *lookup_page_cgroup(struct page *page);
enum {
@ -87,6 +99,10 @@ static inline void page_cgroup_init(void)
{
}
static inline void __init page_cgroup_init_flatmem(void)
{
}
#endif
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP