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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2008-02-07 03:14:35 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 11:42:22 -0500
commitcc38108e1ba7f3b9e12b82d0236fa3730c2e0439 (patch)
tree6e51d191006b5db840c1eee659c372a2de7f85a8 /mm
parent6c48a1d040a9a9eaa4acdd7d4cb3885e04bf8413 (diff)
per-zone and reclaim enhancements for memory controller: calculate the number of pages to be scanned per cgroup
Define function for calculating the number of scan target on each Zone/LRU. 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>
Diffstat (limited to 'mm')
-rw-r--r--mm/memcontrol.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index f8a6a39c440d..40cdba68de34 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -471,6 +471,39 @@ void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, int priority)
471 mem->prev_priority = priority; 471 mem->prev_priority = priority;
472} 472}
473 473
474/*
475 * Calculate # of pages to be scanned in this priority/zone.
476 * See also vmscan.c
477 *
478 * priority starts from "DEF_PRIORITY" and decremented in each loop.
479 * (see include/linux/mmzone.h)
480 */
481
482long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
483 struct zone *zone, int priority)
484{
485 long nr_active;
486 int nid = zone->zone_pgdat->node_id;
487 int zid = zone_idx(zone);
488 struct mem_cgroup_per_zone *mz = mem_cgroup_zoneinfo(mem, nid, zid);
489
490 nr_active = MEM_CGROUP_ZSTAT(mz, MEM_CGROUP_ZSTAT_ACTIVE);
491 return (nr_active >> priority);
492}
493
494long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
495 struct zone *zone, int priority)
496{
497 long nr_inactive;
498 int nid = zone->zone_pgdat->node_id;
499 int zid = zone_idx(zone);
500 struct mem_cgroup_per_zone *mz = mem_cgroup_zoneinfo(mem, nid, zid);
501
502 nr_inactive = MEM_CGROUP_ZSTAT(mz, MEM_CGROUP_ZSTAT_INACTIVE);
503
504 return (nr_inactive >> priority);
505}
506
474unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, 507unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
475 struct list_head *dst, 508 struct list_head *dst,
476 unsigned long *scanned, int order, 509 unsigned long *scanned, int order,