2008-02-07 01:13:50 -07:00
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/* memcontrol.h - Memory Controller
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*
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* Copyright IBM Corporation, 2007
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* Author Balbir Singh <balbir@linux.vnet.ibm.com>
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*
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2008-02-07 01:13:51 -07:00
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* Copyright 2007 OpenVZ SWsoft Inc
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* Author: Pavel Emelianov <xemul@openvz.org>
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*
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2008-02-07 01:13:50 -07:00
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _LINUX_MEMCONTROL_H
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#define _LINUX_MEMCONTROL_H
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2008-02-07 01:13:51 -07:00
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struct mem_cgroup;
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struct page_cgroup;
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2008-02-07 01:13:59 -07:00
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struct page;
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struct mm_struct;
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2008-02-07 01:13:51 -07:00
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2008-03-04 15:28:39 -07:00
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#ifdef CONFIG_CGROUP_MEM_RES_CTLR
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2008-02-07 01:13:51 -07:00
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2008-03-04 15:29:07 -07:00
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#define page_reset_bad_cgroup(page) ((page)->page_cgroup = 0)
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2008-02-07 01:13:51 -07:00
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extern struct page_cgroup *page_get_page_cgroup(struct page *page);
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2008-02-07 01:14:02 -07:00
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extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
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gfp_t gfp_mask);
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2008-03-04 15:29:08 -07:00
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extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
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gfp_t gfp_mask);
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2008-02-07 01:14:41 -07:00
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extern void mem_cgroup_uncharge_page(struct page *page);
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2008-03-04 15:29:03 -07:00
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extern void mem_cgroup_move_lists(struct page *page, bool active);
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2008-02-07 01:13:56 -07:00
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extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
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struct list_head *dst,
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unsigned long *scanned, int order,
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int mode, struct zone *z,
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struct mem_cgroup *mem_cont,
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int active);
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2008-02-07 01:13:58 -07:00
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extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
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2008-02-07 01:14:06 -07:00
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int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
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2008-02-07 01:14:03 -07:00
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cgroups: add an owner to the mm_struct
Remove the mem_cgroup member from mm_struct and instead adds an owner.
This approach was suggested by Paul Menage. The advantage of this approach
is that, once the mm->owner is known, using the subsystem id, the cgroup
can be determined. It also allows several control groups that are
virtually grouped by mm_struct, to exist independent of the memory
controller i.e., without adding mem_cgroup's for each controller, to
mm_struct.
A new config option CONFIG_MM_OWNER is added and the memory resource
controller selects this config option.
This patch also adds cgroup callbacks to notify subsystems when mm->owner
changes. The mm_cgroup_changed callback is called with the task_lock() of
the new task held and is called just prior to changing the mm->owner.
I am indebted to Paul Menage for the several reviews of this patchset and
helping me make it lighter and simpler.
This patch was tested on a powerpc box, it was compiled with both the
MM_OWNER config turned on and off.
After the thread group leader exits, it's moved to init_css_state by
cgroup_exit(), thus all future charges from runnings threads would be
redirected to the init_css_set's subsystem.
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Sudhir Kumar <skumar@linux.vnet.ibm.com>
Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Cc: Hirokazu Takahashi <taka@valinux.co.jp>
Cc: David Rientjes <rientjes@google.com>,
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Reviewed-by: Paul Menage <menage@google.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 02:00:16 -06:00
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extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
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2008-03-04 15:29:01 -07:00
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#define mm_match_cgroup(mm, cgroup) \
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cgroups: add an owner to the mm_struct
Remove the mem_cgroup member from mm_struct and instead adds an owner.
This approach was suggested by Paul Menage. The advantage of this approach
is that, once the mm->owner is known, using the subsystem id, the cgroup
can be determined. It also allows several control groups that are
virtually grouped by mm_struct, to exist independent of the memory
controller i.e., without adding mem_cgroup's for each controller, to
mm_struct.
A new config option CONFIG_MM_OWNER is added and the memory resource
controller selects this config option.
This patch also adds cgroup callbacks to notify subsystems when mm->owner
changes. The mm_cgroup_changed callback is called with the task_lock() of
the new task held and is called just prior to changing the mm->owner.
I am indebted to Paul Menage for the several reviews of this patchset and
helping me make it lighter and simpler.
This patch was tested on a powerpc box, it was compiled with both the
MM_OWNER config turned on and off.
After the thread group leader exits, it's moved to init_css_state by
cgroup_exit(), thus all future charges from runnings threads would be
redirected to the init_css_set's subsystem.
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Sudhir Kumar <skumar@linux.vnet.ibm.com>
Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Cc: Hirokazu Takahashi <taka@valinux.co.jp>
Cc: David Rientjes <rientjes@google.com>,
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Reviewed-by: Paul Menage <menage@google.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 02:00:16 -06:00
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((cgroup) == mem_cgroup_from_task((mm)->owner))
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2008-02-07 01:13:53 -07:00
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2008-07-25 02:47:10 -06:00
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extern int
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mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
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2008-02-07 01:14:10 -07:00
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extern void mem_cgroup_end_migration(struct page *page);
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2008-07-25 02:47:10 -06:00
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extern int mem_cgroup_getref(struct page *page);
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2008-02-07 01:14:10 -07:00
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2008-02-07 01:14:32 -07:00
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/*
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* For memory reclaim.
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*/
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extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
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2008-02-07 01:14:33 -07:00
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extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
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2008-02-07 01:14:34 -07:00
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extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
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extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
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int priority);
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extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
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int priority);
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2008-02-07 01:14:32 -07:00
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2008-02-07 01:14:35 -07:00
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extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
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struct zone *zone, int priority);
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extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
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struct zone *zone, int priority);
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2008-02-07 01:14:32 -07:00
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2008-03-04 15:28:39 -07:00
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#else /* CONFIG_CGROUP_MEM_RES_CTLR */
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static inline void page_reset_bad_cgroup(struct page *page)
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{
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}
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static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
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{
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return NULL;
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}
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2008-03-04 15:29:08 -07:00
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static inline int mem_cgroup_charge(struct page *page,
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struct mm_struct *mm, gfp_t gfp_mask)
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2008-02-07 01:13:53 -07:00
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{
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return 0;
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}
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2008-03-04 15:29:08 -07:00
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static inline int mem_cgroup_cache_charge(struct page *page,
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struct mm_struct *mm, gfp_t gfp_mask)
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2008-02-07 01:13:53 -07:00
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{
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2008-03-04 15:29:08 -07:00
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return 0;
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2008-02-07 01:13:53 -07:00
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}
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static inline void mem_cgroup_uncharge_page(struct page *page)
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{
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}
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2008-03-04 15:29:03 -07:00
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static inline void mem_cgroup_move_lists(struct page *page, bool active)
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2008-02-07 01:13:56 -07:00
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{
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}
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2008-03-04 15:29:01 -07:00
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static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
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2008-02-07 01:14:01 -07:00
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{
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2008-02-09 01:10:15 -07:00
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return 1;
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2008-02-07 01:14:01 -07:00
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}
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2008-02-07 01:14:06 -07:00
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static inline int task_in_mem_cgroup(struct task_struct *task,
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const struct mem_cgroup *mem)
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{
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return 1;
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}
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2008-07-25 02:47:10 -06:00
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static inline int
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mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
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2008-02-07 01:14:10 -07:00
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{
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return 0;
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}
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static inline void mem_cgroup_end_migration(struct page *page)
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{
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}
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2008-07-25 02:47:10 -06:00
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static inline void mem_cgroup_getref(struct page *page)
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2008-02-07 01:14:10 -07:00
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{
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}
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2008-02-07 01:14:32 -07:00
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static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
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{
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return 0;
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}
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2008-02-07 01:14:33 -07:00
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static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
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{
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return 0;
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}
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2008-02-07 01:14:34 -07:00
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static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
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{
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return 0;
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}
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static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
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int priority)
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{
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}
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static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
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int priority)
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{
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}
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2008-02-07 01:14:35 -07:00
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static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
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struct zone *zone, int priority)
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{
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return 0;
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}
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static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
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struct zone *zone, int priority)
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{
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return 0;
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}
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2008-02-07 01:13:51 -07:00
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#endif /* CONFIG_CGROUP_MEM_CONT */
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2008-02-07 01:13:50 -07:00
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#endif /* _LINUX_MEMCONTROL_H */
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