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per-zone and reclaim enhancements for memory controller: calculate mapper_ratio per cgroup

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Define function for calculating mapped_ratio in memory cgroup.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Kirill Korotaev <dev@sw.ru>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Paul Menage <menage@google.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
KAMEZAWA Hiroyuki 2008-02-07 00:14:32 -08:00 committed by Linus Torvalds
parent 6d12e2d8dd
commit 58ae83db2a
2 changed files with 27 additions and 1 deletions
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11
include/linux/memcontrol.h
View File

@ -64,6 +64,12 @@ extern int mem_cgroup_prepare_migration(struct page *page);
extern void mem_cgroup_end_migration(struct page *page); extern void mem_cgroup_end_migration(struct page *page);
extern void mem_cgroup_page_migration(struct page *page, struct page *newpage); extern void mem_cgroup_page_migration(struct page *page, struct page *newpage);
/*
* For memory reclaim.
*/
extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
#else /* CONFIG_CGROUP_MEM_CONT */ #else /* CONFIG_CGROUP_MEM_CONT */
static inline void mm_init_cgroup(struct mm_struct *mm, static inline void mm_init_cgroup(struct mm_struct *mm,
struct task_struct *p) struct task_struct *p)
@ -135,7 +141,10 @@ mem_cgroup_page_migration(struct page *page, struct page *newpage)
{ {
} }
static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
{
return 0;
}
#endif /* CONFIG_CGROUP_MEM_CONT */ #endif /* CONFIG_CGROUP_MEM_CONT */
#endif /* _LINUX_MEMCONTROL_H */ #endif /* _LINUX_MEMCONTROL_H */

17
mm/memcontrol.c
View File

@ -420,6 +420,23 @@ void mem_cgroup_move_lists(struct page_cgroup *pc, bool active)
spin_unlock(&mem->lru_lock); spin_unlock(&mem->lru_lock);
} }
/*
* Calculate mapped_ratio under memory controller. This will be used in
* vmscan.c for deteremining we have to reclaim mapped pages.
*/
int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
{
long total, rss;
/*
* usage is recorded in bytes. But, here, we assume the number of
* physical pages can be represented by "long" on any arch.
*/
total = (long) (mem->res.usage >> PAGE_SHIFT) + 1L;
rss = (long)mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_RSS);
return (int)((rss * 100L) / total);
}
unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
struct list_head *dst, struct list_head *dst,
unsigned long *scanned, int order, unsigned long *scanned, int order,