4c4a221489
Creates a helper function to return non-zero if a task is a member of a memory controller: int task_in_mem_cgroup(const struct task_struct *task, const struct mem_cgroup *mem); When the OOM killer is constrained by the memory controller, the exclusion of tasks that are not a member of that controller was previously misplaced and appeared in the badness scoring function. It should be excluded during the tasklist scan in select_bad_process() instead. [akpm@linux-foundation.org: build fix] Cc: Christoph Lameter <clameter@sgi.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
123 lines
3.2 KiB
C
123 lines
3.2 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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#include <linux/rcupdate.h>
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#include <linux/mm.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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gfp_t gfp_mask);
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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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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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static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
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{
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return rcu_dereference(mm->mem_cgroup);
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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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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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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(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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gfp_t gfp_mask)
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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(const struct mm_struct *mm)
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{
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return NULL;
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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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#endif /* CONFIG_CGROUP_MEM_CONT */
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#endif /* _LINUX_MEMCONTROL_H */
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