Commit 5932f367 authored by KAMEZAWA Hiroyuki's avatar KAMEZAWA Hiroyuki Committed by Linus Torvalds
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per-zone and reclaim enhancements for memory controller: calculate... 


per-zone and reclaim enhancements for memory controller: calculate active/inactive imbalance per cgroup

Signed-off-by: default avatarKAMEZAWA 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 58ae83db

include/linux/memcontrol.h

+8 −0
Original line number Diff line number Diff line
@@ -68,6 +68,8 @@ 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);

extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);







#else /* CONFIG_CGROUP_MEM_CONT */
@@ -145,6 +147,12 @@ static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) 
{

	return 0;

}



static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)

{

	return 0;

}



#endif /* CONFIG_CGROUP_MEM_CONT */



#endif /* _LINUX_MEMCONTROL_H */

mm/memcontrol.c

+14 −0
Original line number Diff line number Diff line
@@ -436,6 +436,20 @@ int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) 
	rss = (long)mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_RSS);

	return (int)((rss * 100L) / total);

}

/*

 * This function is called from vmscan.c. In page reclaiming loop. balance

 * between active and inactive list is calculated. For memory controller

 * page reclaiming, we should use using mem_cgroup's imbalance rather than

 * zone's global lru imbalance.

 */

long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)

{

	unsigned long active, inactive;

	/* active and inactive are the number of pages. 'long' is ok.*/

	active = mem_cgroup_get_all_zonestat(mem, MEM_CGROUP_ZSTAT_ACTIVE);

	inactive = mem_cgroup_get_all_zonestat(mem, MEM_CGROUP_ZSTAT_INACTIVE);

	return (long) (active / (inactive + 1));

}



unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,

					struct list_head *dst,

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