bed7161a51
Make page_referenced() cgroup aware. Without this patch, page_referenced() can cause a page to be skipped while reclaiming pages. This patch ensures that other cgroups do not hold pages in a particular cgroup hostage. It is required to ensure that shared pages are freed from a cgroup when they are not actively referenced from the cgroup that brought them in Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Pavel Emelianov <xemul@openvz.org> Cc: Paul Menage <menage@google.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Kirill Korotaev <dev@sw.ru> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: David Rientjes <rientjes@google.com> Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
106 lines
2.8 KiB
C
106 lines
2.8 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_CONT
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extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
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extern void mm_free_cgroup(struct mm_struct *mm);
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extern void page_assign_page_cgroup(struct page *page,
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struct page_cgroup *pc);
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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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extern void mem_cgroup_uncharge(struct page_cgroup *pc);
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extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
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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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extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm);
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extern struct mem_cgroup *mm_cgroup(struct mm_struct *mm);
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static inline void mem_cgroup_uncharge_page(struct page *page)
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{
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mem_cgroup_uncharge(page_get_page_cgroup(page));
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}
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#else /* CONFIG_CGROUP_MEM_CONT */
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static inline void mm_init_cgroup(struct mm_struct *mm,
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struct task_struct *p)
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{
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}
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static inline void mm_free_cgroup(struct mm_struct *mm)
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{
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}
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static inline void page_assign_page_cgroup(struct page *page,
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struct page_cgroup *pc)
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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, struct mm_struct *mm)
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{
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return 0;
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}
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static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
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{
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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_move_lists(struct page_cgroup *pc,
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bool active)
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{
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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)
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{
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return 0;
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}
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static inline struct mem_cgroup *mm_cgroup(struct mm_struct *mm)
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{
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return NULL;
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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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