From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, T_DKIMWL_WL_HIGH autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E4C6C46469 for ; Wed, 12 Sep 2018 13:31:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D8B2C20854 for ; Wed, 12 Sep 2018 13:31:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="nv3XL8Fz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D8B2C20854 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727670AbeILSgS (ORCPT ); Wed, 12 Sep 2018 14:36:18 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:38988 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726642AbeILSgS (ORCPT ); Wed, 12 Sep 2018 14:36:18 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w8CDTEKi041266; Wed, 12 Sep 2018 13:31:31 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2018-07-02; bh=wIQl5Jcc5252bXoEoaBBGvv+myxEy41bsq+Hf3UwZVQ=; b=nv3XL8FzNHlHBdxxvRLLEKbQxGSNyUVkSD+kwXSEqtQl2PChFLtA3z5yDNj7YgwRplS4 ZOYmqvhwMDEMtBJvWpEA5J6avN+0ESdWO/l6CSTLMLAqKIykfNo0Gs8TRWgJJ3Wbq9it aKSkSVyqhsfRvAwx603FK5CM8msAS2Cdn8w+KNs73bCKlu1rkXUspYU/4wVzmiardvY+ F5gh7gd0hUA9/BFTS9rYOHeSwU9MlCaNhuPtImHx5jSlRywwB8Y2xEHINP8DtVT500LT A+UO9RwppHuHN7rIM7pLN+vR2Xi1dYkIZJww/ogJwfJzC52B+U5B9kQqGjf8G/D78VZO fw== Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp2130.oracle.com with ESMTP id 2mc5utj5dy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 12 Sep 2018 13:31:31 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w8CDVOZv027819 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 12 Sep 2018 13:31:25 GMT Received: from abhmp0010.oracle.com (abhmp0010.oracle.com [141.146.116.16]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w8CDVNiI021059; Wed, 12 Sep 2018 13:31:23 GMT Received: from [10.152.34.32] (/10.152.34.32) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 12 Sep 2018 06:31:23 -0700 Subject: Re: [RFC PATCH v2 2/8] mm: make zone_reclaim_stat updates thread-safe To: Laurent Dufour , linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Cc: aaron.lu@intel.com, ak@linux.intel.com, akpm@linux-foundation.org, dave.dice@oracle.com, dave.hansen@linux.intel.com, hannes@cmpxchg.org, levyossi@icloud.com, mgorman@techsingularity.net, mhocko@kernel.org, Pavel.Tatashin@microsoft.com, steven.sistare@oracle.com, tim.c.chen@intel.com, vdavydov.dev@gmail.com, ying.huang@intel.com References: <20180911004240.4758-1-daniel.m.jordan@oracle.com> <20180911004240.4758-3-daniel.m.jordan@oracle.com> From: Daniel Jordan Message-ID: <7e0c2fe0-c867-3ea2-83a2-c3bcb35057d7@oracle.com> Date: Wed, 12 Sep 2018 09:30:28 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9013 signatures=668708 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809120140 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/11/18 12:40 PM, Laurent Dufour wrote: > On 11/09/2018 02:42, Daniel Jordan wrote: >> diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h >> index 32699b2dc52a..6d4c23a3069d 100644 >> --- a/include/linux/mmzone.h >> +++ b/include/linux/mmzone.h >> @@ -229,6 +229,12 @@ struct zone_reclaim_stat { >> * >> * The anon LRU stats live in [0], file LRU stats in [1] >> */ >> + atomic_long_t recent_rotated[2]; >> + atomic_long_t recent_scanned[2]; > > It might be better to use a slightly different name for these fields to > distinguish them from the ones in the zone_reclaim_stat_cpu structure. Sure, these are now named recent_rotated_cpu and recent_scanned_cpu, absent better names. Thanks for your comments.