b69408e88b
Currently we are defining explicit variables for the inactive and active list. An indexed array can be more generic and avoid repeating similar code in several places in the reclaim code. We are saving a few bytes in terms of code size: Before: text data bss dec hex filename 4097753 573120 4092484 8763357 85b7dd vmlinux After: text data bss dec hex filename 4097729 573120 4092484 8763333 85b7c5 vmlinux Having an easy way to add new lru lists may ease future work on the reclaim code. Signed-off-by: Rik van Riel <riel@redhat.com> Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
170 lines
4.4 KiB
C
170 lines
4.4 KiB
C
/* 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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* Copyright 2007 OpenVZ SWsoft Inc
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* Author: Pavel Emelianov <xemul@openvz.org>
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*
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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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struct mem_cgroup;
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struct page_cgroup;
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struct page;
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struct mm_struct;
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#ifdef CONFIG_CGROUP_MEM_RES_CTLR
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#define page_reset_bad_cgroup(page) ((page)->page_cgroup = 0)
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extern struct page_cgroup *page_get_page_cgroup(struct page *page);
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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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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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extern void mem_cgroup_uncharge_page(struct page *page);
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extern void mem_cgroup_uncharge_cache_page(struct page *page);
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extern void mem_cgroup_move_lists(struct page *page, bool active);
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extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
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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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extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
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int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
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extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
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#define mm_match_cgroup(mm, cgroup) \
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((cgroup) == mem_cgroup_from_task((mm)->owner))
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extern int
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mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
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extern void mem_cgroup_end_migration(struct page *page);
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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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extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
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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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extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
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int priority, enum lru_list lru);
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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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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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{
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return 0;
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}
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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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{
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return 0;
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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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static inline void mem_cgroup_uncharge_cache_page(struct page *page)
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{
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}
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static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
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{
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return 0;
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}
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static inline void mem_cgroup_move_lists(struct page *page, bool active)
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{
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}
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static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
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{
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return 1;
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}
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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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static inline int
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mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
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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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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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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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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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static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
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struct zone *zone, int priority,
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enum lru_list lru)
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{
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return 0;
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}
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#endif /* CONFIG_CGROUP_MEM_CONT */
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#endif /* _LINUX_MEMCONTROL_H */
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