From patchwork Fri Aug 30 13:20:27 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Srivatsa S. Bhat" X-Patchwork-Id: 2852037 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 42A899F313 for ; Fri, 30 Aug 2013 13:25:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 28B7E204CE for ; Fri, 30 Aug 2013 13:25:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DE7762015B for ; Fri, 30 Aug 2013 13:25:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754812Ab3H3NYm (ORCPT ); Fri, 30 Aug 2013 09:24:42 -0400 Received: from e8.ny.us.ibm.com ([32.97.182.138]:59834 "EHLO e8.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755961Ab3H3NYk (ORCPT ); Fri, 30 Aug 2013 09:24:40 -0400 Received: from /spool/local by e8.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 30 Aug 2013 14:24:39 +0100 Received: from d01dlp02.pok.ibm.com (9.56.250.167) by e8.ny.us.ibm.com (192.168.1.108) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Fri, 30 Aug 2013 14:24:37 +0100 Received: from b01cxnp22034.gho.pok.ibm.com (b01cxnp22034.gho.pok.ibm.com [9.57.198.24]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id 6724F6E8040; Fri, 30 Aug 2013 09:24:36 -0400 (EDT) Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by b01cxnp22034.gho.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r7UDOaAf24707090; Fri, 30 Aug 2013 13:24:36 GMT Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r7UDORFj031868; Fri, 30 Aug 2013 09:24:35 -0400 Received: from srivatsabhat.in.ibm.com ([9.79.248.196]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id r7UDODCv030491; Fri, 30 Aug 2013 09:24:20 -0400 From: "Srivatsa S. Bhat" Subject: [RFC PATCH v3 21/35] mm: Provide a mechanism to release free memory to the region allocator To: akpm@linux-foundation.org, mgorman@suse.de, hannes@cmpxchg.org, tony.luck@intel.com, matthew.garrett@nebula.com, dave@sr71.net, riel@redhat.com, arjan@linux.intel.com, srinivas.pandruvada@linux.intel.com, willy@linux.intel.com, kamezawa.hiroyu@jp.fujitsu.com, lenb@kernel.org, rjw@sisk.pl Cc: gargankita@gmail.com, paulmck@linux.vnet.ibm.com, svaidy@linux.vnet.ibm.com, andi@firstfloor.org, isimatu.yasuaki@jp.fujitsu.com, santosh.shilimkar@ti.com, kosaki.motohiro@gmail.com, srivatsa.bhat@linux.vnet.ibm.com, linux-pm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Date: Fri, 30 Aug 2013 18:50:27 +0530 Message-ID: <20130830132015.4947.83016.stgit@srivatsabhat.in.ibm.com> In-Reply-To: <20130830131221.4947.99764.stgit@srivatsabhat.in.ibm.com> References: <20130830131221.4947.99764.stgit@srivatsabhat.in.ibm.com> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13083013-0320-0000-0000-000000D85654 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-9.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Implement helper functions to release freepages from the buddy freelists to the region allocator. For simplicity, all operations related to the region allocator are performed at the granularity of entire memory regions. That is, when we release freepages to the region allocator, we free all the pages belonging to that region. Signed-off-by: Srivatsa S. Bhat --- mm/page_alloc.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 5227ac3..d407caf 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -918,6 +918,26 @@ static void move_page_freelist(struct page *page, struct free_list *old_list, add_to_freelist(page, new_list, order); } +/* Add pages from the given buddy freelist to the region allocator */ +static void add_to_region_allocator(struct zone *z, struct free_list *free_list, + int region_id) +{ + struct region_allocator *reg_alloc; + struct list_head *ralloc_list; + int order; + + if (WARN_ON(list_empty(&free_list->list))) + return; + + order = page_order(list_first_entry(&free_list->list, + struct page, lru)); + + reg_alloc = &z->region_allocator; + ralloc_list = ®_alloc->region[region_id].region_area[order].list; + + del_from_freelist_bulk(ralloc_list, free_list, order, region_id); +} + /* * Freeing function for a buddy system allocator. *