mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 06:04:14 +08:00
52d4b9ac0b
Allocate all page_cgroup at boot and remove page_cgroup poitner from
struct page. This patch adds an interface as
struct page_cgroup *lookup_page_cgroup(struct page*)
All FLATMEM/DISCONTIGMEM/SPARSEMEM and MEMORY_HOTPLUG is supported.
Remove page_cgroup pointer reduces the amount of memory by
- 4 bytes per PAGE_SIZE.
- 8 bytes per PAGE_SIZE
if memory controller is disabled. (even if configured.)
On usual 8GB x86-32 server, this saves 8MB of NORMAL_ZONE memory.
On my x86-64 server with 48GB of memory, this saves 96MB of memory.
I think this reduction makes sense.
By pre-allocation, kmalloc/kfree in charge/uncharge are removed.
This means
- we're not necessary to be afraid of kmalloc faiulre.
(this can happen because of gfp_mask type.)
- we can avoid calling kmalloc/kfree.
- we can avoid allocating tons of small objects which can be fragmented.
- we can know what amount of memory will be used for this extra-lru handling.
I added printk message as
"allocated %ld bytes of page_cgroup"
"please try cgroup_disable=memory option if you don't want"
maybe enough informative for users.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
159 lines
4.1 KiB
C
159 lines
4.1 KiB
C
/* memcontrol.h - Memory Controller
|
|
*
|
|
* Copyright IBM Corporation, 2007
|
|
* Author Balbir Singh <balbir@linux.vnet.ibm.com>
|
|
*
|
|
* Copyright 2007 OpenVZ SWsoft Inc
|
|
* Author: Pavel Emelianov <xemul@openvz.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef _LINUX_MEMCONTROL_H
|
|
#define _LINUX_MEMCONTROL_H
|
|
|
|
struct mem_cgroup;
|
|
struct page_cgroup;
|
|
struct page;
|
|
struct mm_struct;
|
|
|
|
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
|
|
|
|
extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
|
|
gfp_t gfp_mask);
|
|
extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
|
|
gfp_t gfp_mask);
|
|
extern void mem_cgroup_move_lists(struct page *page, enum lru_list lru);
|
|
extern void mem_cgroup_uncharge_page(struct page *page);
|
|
extern void mem_cgroup_uncharge_cache_page(struct page *page);
|
|
extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
|
|
|
|
extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
|
|
struct list_head *dst,
|
|
unsigned long *scanned, int order,
|
|
int mode, struct zone *z,
|
|
struct mem_cgroup *mem_cont,
|
|
int active, int file);
|
|
extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
|
|
int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
|
|
|
|
extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
|
|
|
|
#define mm_match_cgroup(mm, cgroup) \
|
|
((cgroup) == mem_cgroup_from_task((mm)->owner))
|
|
|
|
extern int
|
|
mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
|
|
extern void mem_cgroup_end_migration(struct page *page);
|
|
|
|
/*
|
|
* For memory reclaim.
|
|
*/
|
|
extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
|
|
extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
|
|
|
|
extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
|
|
extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
|
|
int priority);
|
|
extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
|
|
int priority);
|
|
|
|
extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
|
|
int priority, enum lru_list lru);
|
|
|
|
|
|
#else /* CONFIG_CGROUP_MEM_RES_CTLR */
|
|
static inline int mem_cgroup_charge(struct page *page,
|
|
struct mm_struct *mm, gfp_t gfp_mask)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int mem_cgroup_cache_charge(struct page *page,
|
|
struct mm_struct *mm, gfp_t gfp_mask)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void mem_cgroup_uncharge_page(struct page *page)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_uncharge_cache_page(struct page *page)
|
|
{
|
|
}
|
|
|
|
static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void mem_cgroup_move_lists(struct page *page, bool active)
|
|
{
|
|
}
|
|
|
|
static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static inline int task_in_mem_cgroup(struct task_struct *task,
|
|
const struct mem_cgroup *mem)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static inline int
|
|
mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void mem_cgroup_end_migration(struct page *page)
|
|
{
|
|
}
|
|
|
|
static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
|
|
int priority)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
|
|
int priority)
|
|
{
|
|
}
|
|
|
|
static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
|
|
struct zone *zone, int priority,
|
|
enum lru_list lru)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_CGROUP_MEM_CONT */
|
|
|
|
#endif /* _LINUX_MEMCONTROL_H */
|
|
|