Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754612Ab1EZF0D (ORCPT ); Thu, 26 May 2011 01:26:03 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:48688 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751448Ab1EZFZ7 (ORCPT ); Thu, 26 May 2011 01:25:59 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 Date: Thu, 26 May 2011 14:19:09 +0900 From: KAMEZAWA Hiroyuki To: KAMEZAWA Hiroyuki Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , Ying Han , "nishimura@mxp.nes.nec.co.jp" , "balbir@linux.vnet.ibm.com" Subject: [RFC][PATCH v3 3/10] memcg: a test whether zone is reclaimable or not Message-Id: <20110526141909.ec42113e.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20110526141047.dc828124.kamezawa.hiroyu@jp.fujitsu.com> References: <20110526141047.dc828124.kamezawa.hiroyu@jp.fujitsu.com> Organization: FUJITSU Co. LTD. X-Mailer: Sylpheed 3.1.0 (GTK+ 2.10.14; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2513 Lines: 69 From: Ying Han The number of reclaimable pages per zone is an useful information for controling memory reclaim schedule. This patch exports it. Changelog v2->v3: - added comments. Signed-off-by: Ying Han Signed-off-by: KAMEZAWA Hiroyuki --- include/linux/memcontrol.h | 2 ++ mm/memcontrol.c | 24 ++++++++++++++++++++++++ 2 files changed, 26 insertions(+) Index: memcg_async/mm/memcontrol.c =================================================================== --- memcg_async.orig/mm/memcontrol.c +++ memcg_async/mm/memcontrol.c @@ -1240,6 +1240,30 @@ static unsigned long mem_cgroup_nr_lru_p } #endif /* CONFIG_NUMA */ +/** + * mem_cgroup_zone_reclaimable_pages + * @memcg: the memcg + * @nid : node index to be checked. + * @zid : zone index to be checked. + * + * This function returns the number reclaimable pages on a zone for given memcg. + * Reclaimable page includes file caches and anonymous pages if swap is + * avaliable and never includes unevictable pages. + */ +unsigned long mem_cgroup_zone_reclaimable_pages(struct mem_cgroup *memcg, + int nid, int zid) +{ + unsigned long nr; + struct mem_cgroup_per_zone *mz = mem_cgroup_zoneinfo(memcg, nid, zid); + + nr = MEM_CGROUP_ZSTAT(mz, NR_ACTIVE_FILE) + + MEM_CGROUP_ZSTAT(mz, NR_ACTIVE_FILE); + if (nr_swap_pages > 0) + nr += MEM_CGROUP_ZSTAT(mz, NR_ACTIVE_ANON) + + MEM_CGROUP_ZSTAT(mz, NR_INACTIVE_ANON); + return nr; +} + struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) { Index: memcg_async/include/linux/memcontrol.h =================================================================== --- memcg_async.orig/include/linux/memcontrol.h +++ memcg_async/include/linux/memcontrol.h @@ -109,6 +109,8 @@ extern void mem_cgroup_end_migration(str */ int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); 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); int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, struct zone *zone, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/