From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756080Ab3H3NYn (ORCPT ); Fri, 30 Aug 2013 09:24:43 -0400 Received: from e8.ny.us.ibm.com ([32.97.182.138]:59833 "EHLO e8.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755798Ab3H3NYk (ORCPT ); Fri, 30 Aug 2013 09:24:40 -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 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13083013-0320-0000-0000-000000D85654 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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(+) 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. * From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Srivatsa S. Bhat" Subject: [RFC PATCH v3 21/35] mm: Provide a mechanism to release free memory to the region allocator Date: Fri, 30 Aug 2013 18:50:27 +0530 Message-ID: <20130830132015.4947.83016.stgit@srivatsabhat.in.ibm.com> References: <20130830131221.4947.99764.stgit@srivatsabhat.in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20130830131221.4947.99764.stgit@srivatsabhat.in.ibm.com> Sender: owner-linux-mm@kvack.org 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 List-Id: linux-pm@vger.kernel.org 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(+) 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. * -- 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/ . Don't email: email@kvack.org