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=-1.6 required=3.0 tests=BAYES_00,DATE_IN_FUTURE_06_12, DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS autolearn=no 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 D4A7BC432BE for ; Wed, 1 Sep 2021 05:12:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B514361056 for ; Wed, 1 Sep 2021 05:12:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241948AbhIAFNF (ORCPT ); Wed, 1 Sep 2021 01:13:05 -0400 Received: from mail-mw2nam12on2090.outbound.protection.outlook.com ([40.107.244.90]:18049 "EHLO NAM12-MW2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S241800AbhIAFNE (ORCPT ); Wed, 1 Sep 2021 01:13:04 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=NJGvxUSMdhXS37DePL0QwtROKPAyofsHEmsdr94WWEEvWlKrAirDq8bj+8doQ/ADH4UOi8X/j9FiM3XrPJ2WD7cgcxq/5FOrG6Hv9f5thUCLy1xzyye/rAVhVMbb0tTGMU5gwNawVmrJLmn/+1VeHnYY/bTPe77PFeL58m+4W57PVgBEnqzUejk6ch8JEvKTZeaH5cLgWD/IQ7YpIvQ9y4gGv6s7PXGiEY1IfGPtrMQebkepCExv0oWEpP7oE8srMjlySBqe2QLCoq1GL0cUaDX2p6eIj9QEca8eQ2cNEq3hUKWJp5A4xXFhSCK+jp5olXVOxx1dZ4Rew7ZLB2kaew== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=DvrjrVUHghjQwDnDu5I3uOzRKsUlRoxutkS/fKUISlM=; b=ekPvTFnnObDrD0w/4Qd8sn8rjKRXsEarBm76c6Az53FOll+cwL0a0fvBITFNmT8Jq13O3G4rgghgRrpZUjhdn43t07+3PKaApsdk335klgePysscLGhbDfkm1eyel/uVuCKq1ngcYX5MeELV4pJvPhgtEl/hopybFG07TVDxQlJVKbEWM6iG4ykpyvsPPKveJr01RFtrv8FH/2mv6+NCaS647aHC2o6u05jNP+msH7PbwK1W+TW/ympbFTd7HJx1BqFhMz+vqPoI0b1PBaASD4THPoyGx33u0BTk4EYhkq7LVgpUnD9zInDALQUfBtBDbu+bj3qW9TqCOtVdFrO5MQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=os.amperecomputing.com; dmarc=pass action=none header.from=os.amperecomputing.com; dkim=pass header.d=os.amperecomputing.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=os.amperecomputing.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=DvrjrVUHghjQwDnDu5I3uOzRKsUlRoxutkS/fKUISlM=; b=YlbjdoeRwGLcWM0bwuHWYwm3JQcig+FaizSN05RPRer8m92ejHzJx5iPct4dRUc831wI+0fIgEuG1AGisWq/inzIMAss4zasAd5T6WA10FCNHT5p97OXAsxyw+KW+6b0+iylkhxfzdyp5i4Ft8NThldMIgJ0RsgjkPAFv++tzHo= Authentication-Results: zeniv.linux.org.uk; dkim=none (message not signed) header.d=none;zeniv.linux.org.uk; dmarc=none action=none header.from=os.amperecomputing.com; Received: from CY4PR0101MB3160.prod.exchangelabs.com (2603:10b6:910:45::12) by CY1PR01MB2154.prod.exchangelabs.com (2a01:111:e400:c615::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4457.23; Wed, 1 Sep 2021 05:12:05 +0000 Received: from CY4PR0101MB3160.prod.exchangelabs.com ([fe80::d054:80e9:cd9c:6c20]) by CY4PR0101MB3160.prod.exchangelabs.com ([fe80::d054:80e9:cd9c:6c20%6]) with mapi id 15.20.4457.024; Wed, 1 Sep 2021 05:12:05 +0000 Date: Wed, 1 Sep 2021 13:10:37 +0000 From: Huang Shijie To: Al Viro Cc: Shijie Huang , torvalds@linux-foundation.org, akpm@linux-foundation.org, linux-mm@kvack.org, song.bao.hua@hisilicon.com, linux-kernel@vger.kernel.org, Frank Wang Subject: Re: Is it possible to implement the per-node page cache for programs/libraries? Message-ID: References: Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-ClientProxiedBy: CH2PR12CA0001.namprd12.prod.outlook.com (2603:10b6:610:57::11) To CY4PR0101MB3160.prod.exchangelabs.com (2603:10b6:910:45::12) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from hsj (180.167.209.74) by CH2PR12CA0001.namprd12.prod.outlook.com (2603:10b6:610:57::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4478.17 via Frontend Transport; Wed, 1 Sep 2021 05:12:01 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: ba4d9b6b-7fc9-4497-4dbf-08d96d0709e1 X-MS-TrafficTypeDiagnostic: CY1PR01MB2154: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4125; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CY4PR0101MB3160.prod.exchangelabs.com;PTR:;CAT:NONE;SFS:(4636009)(366004)(376002)(396003)(136003)(346002)(39850400004)(83380400001)(54906003)(9576002)(316002)(66946007)(9686003)(38350700002)(2906002)(86362001)(6496006)(66556008)(66476007)(4326008)(4744005)(52116002)(8936002)(107886003)(186003)(38100700002)(8676002)(956004)(5660300002)(478600001)(26005)(6666004)(55016002)(6916009)(33716001);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?iso-8859-1?Q?F5vhYLY7FOrQNwa3VvBfdshaMLYhLxDgc+6uHT2aanG+C7mkNG3vcBktBg?= =?iso-8859-1?Q?7Tzwwgb1332tjMxOCzqQt4A4ReXkQhwLZGZX/eIbsDXTpZSNUusRgiU3qy?= =?iso-8859-1?Q?NUfJlNH5sKxHSb+jt/kZ46mys/gXoDpI+cGW7JUg+qnEvXFYO7D+qMyxjW?= =?iso-8859-1?Q?rmcsXkCoPPzPjS6VHS3suSjQP0NlymMogK5Z30wq5f7/N/KUZ9c2CCSnRp?= =?iso-8859-1?Q?V9kyNgreAVtKLYA9l0zTkSb1EW31743PsA77hJ8QmaYAYQMEN/E8pfnVG8?= =?iso-8859-1?Q?eiva3H1HOVbtGA88NE69ssJVf3IncCyiBn/KF5tDBObGbQ37Cs+S1SdnEi?= =?iso-8859-1?Q?AridG5lqNdV7J+96aJzen1NyuQ1YIaNmFDfAeO/yOa4bsI1dukzmu2c0/i?= =?iso-8859-1?Q?g32iVIQUSnGi+6lDtHHTlpCaN/JCilX67ZbTHvrt3lpvwc74dwB1tiTY4i?= =?iso-8859-1?Q?n9uwggfFmhnFC5RFjVfaGhWs09C/2mwFpznDrFDfznZG38gtf9yRI+4lfx?= =?iso-8859-1?Q?m4gyGnevt6uFJdi+fJI0Qzb16JmCKhOxBw7iUfkd59VDTLmox2eAY7Ertr?= =?iso-8859-1?Q?RIytp94JG/2e2r/94A6F8TogRBSaPDY6ulcX8sIixacslS0OWlGxi54LT6?= =?iso-8859-1?Q?NtR9/wktW7iVpIpgJXHBJkDULZqW4zs4rFpvRQONBrv/D7mCdvxVaevmeS?= =?iso-8859-1?Q?J8A9+7EdperybVBbVWTjhW9DFphrSYwf+QBz0zzFdtyfRN6HNWsNYAzhiJ?= =?iso-8859-1?Q?DP3P3/NRUhuwo2HXBdMgSfTYGZdX60TL5bvkCoUqrAVVnvnvzcPw1aimHh?= =?iso-8859-1?Q?MVjiMgZVxjeR+ACIIJ8F3WcAkI9kWCg5SSk17VQD1+CKc7PFbRbqrbWxnM?= =?iso-8859-1?Q?zQORO9FP5RIg+Y+gnzo6UG9fyfm8hHS8kJbv+s3Lj43AGv539GwBDaUix0?= =?iso-8859-1?Q?HnBNqV4rNavOdO3QoHAqHGKGqDw75KRsQN+wPCTZZafNN7HCMtq6JH1t1u?= =?iso-8859-1?Q?JP5syHZHCrc9e3DN2B6wtkNSqbz/Zr5C+zHuZQuFwjjWegK780FyOrA6p4?= =?iso-8859-1?Q?xVw2zymCTJ0wUQMQSccmZ1H6/Km260KZa9GDfKKM+mbmSw7zRSoHu3390A?= =?iso-8859-1?Q?aRhnlEqwUdfPKHYemnIchIVAKxWGBgkJg2tlKq8a8jJ/QKtW093XJvsqiB?= =?iso-8859-1?Q?R7GA5VwRwMgJevSVcjC4jfZfP0FEoXwrKTDZNIrtK8hc61Bvd/OdtnptXk?= =?iso-8859-1?Q?L7UxHqRpKaJja+rRFTF0iVWl7gG5Y+8V6U/g9vAGbv2c/Y+9mczf7XRIFU?= =?iso-8859-1?Q?rfRQigb/0BRFf1Y35weh4Ia8STmxJEDCrx4kZVlY6qECG4Tsh7oOpP+CDh?= =?iso-8859-1?Q?ITffN0cRMy?= X-OriginatorOrg: os.amperecomputing.com X-MS-Exchange-CrossTenant-Network-Message-Id: ba4d9b6b-7fc9-4497-4dbf-08d96d0709e1 X-MS-Exchange-CrossTenant-AuthSource: CY4PR0101MB3160.prod.exchangelabs.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Sep 2021 05:12:05.2382 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3bc2b170-fd94-476d-b0ce-4229bdc904a7 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: MSaorvL8TTNSczTl87CovHnRZjYzzjLCsGT0+N+Nas4sDys95ah6TxnoiH7fShjOJF8OMXw4nTI4AaTqe+cStK3/iXRbVZ3Y6S4LQ7XPf6i36cmYAffkUwBV7MaB3Vh+ X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR01MB2154 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 01, 2021 at 04:55:01AM +0000, Al Viro wrote: > On Wed, Sep 01, 2021 at 11:07:41AM +0800, Shijie Huang wrote: > > Hi Everyone, > > > >     In the NUMA, we only have one page cache for each file. For the > > program/shared libraries, the > > > > remote-access delays longer then the  local-access. > > > > So, is it possible to implement the per-node page cache for > > programs/libraries? > > What do you mean, per-node page cache? Multiple pages for the same > area of file? That'd be bloody awful on coherency... Yes. per-NUMA-node page cache. We can limit the files to program/(shared libraries) which are read-only mostly, and do not need coherency. Thanks Huang Shijie