From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id 3C01690010C for ; Tue, 10 May 2011 06:15:01 -0400 (EDT) Received: from m4.gw.fujitsu.co.jp (unknown [10.0.50.74]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 2D0893EE0C2 for ; Tue, 10 May 2011 19:14:59 +0900 (JST) Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 118FA45DE54 for ; Tue, 10 May 2011 19:14:59 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id ECC9845DE4E for ; Tue, 10 May 2011 19:14:58 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id DE396E78002 for ; Tue, 10 May 2011 19:14:58 +0900 (JST) Received: from ml14.s.css.fujitsu.com (ml14.s.css.fujitsu.com [10.240.81.134]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id A481E1DB8037 for ; Tue, 10 May 2011 19:14:58 +0900 (JST) Date: Tue, 10 May 2011 19:08:20 +0900 From: KAMEZAWA Hiroyuki Subject: [RFC][PATCH 4/7] memcg : test a memcg is reclaimable Message-Id: <20110510190820.c62aca76.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20110510190216.f4eefef7.kamezawa.hiroyu@jp.fujitsu.com> References: <20110510190216.f4eefef7.kamezawa.hiroyu@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: KAMEZAWA Hiroyuki Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Ying Han , Johannes Weiner , Michal Hocko , "balbir@linux.vnet.ibm.com" , "nishimura@mxp.nes.nec.co.jp" A function for checking that a memcg has reclaimable pages. This makes use of mem->scan_nodes when CONFIG_NUMA=y. Signed-off-by: KAMEZAWA Hiroyuki --- include/linux/memcontrol.h | 1 + mm/memcontrol.c | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+) Index: mmotm-May6/mm/memcontrol.c =================================================================== --- mmotm-May6.orig/mm/memcontrol.c +++ mmotm-May6/mm/memcontrol.c @@ -1623,11 +1623,30 @@ int mem_cgroup_select_victim_node(struct return node; } +bool mem_cgroup_test_reclaimable(struct mem_cgroup *memcg) +{ + mem_cgroup_may_update_nodemask(memcg); + return !nodes_empty(memcg->scan_nodes); +} + #else int mem_cgroup_select_victim_node(struct mem_cgroup *mem) { return 0; } + +bool mem_cgroup_test_reclaimable(struct mem_cgroup *memcg) +{ + unsigned long nr; + int zid; + + for (zid = NODE_DATA(0)->nr_zones - 1; zid >= 0; zid--) + if (mem_cgroup_zone_reclaimable_pages(memcg, 0, zid)) + break; + if (zid < 0) + return false; + return true; +} #endif /* Index: mmotm-May6/include/linux/memcontrol.h =================================================================== --- mmotm-May6.orig/include/linux/memcontrol.h +++ mmotm-May6/include/linux/memcontrol.h @@ -110,6 +110,7 @@ int mem_cgroup_inactive_anon_is_low(stru int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg); unsigned long mem_cgroup_zone_reclaimable_pages(struct mem_cgroup *memcg, int nid, int zid); +bool mem_cgroup_test_reclaimable(struct mem_cgroup *memcg); int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); unsigned int mem_cgroup_swappiness(struct mem_cgroup *memcg); unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org