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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6E89FEB64DA for ; Sat, 8 Jul 2023 05:34:21 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D30508D0002; Sat, 8 Jul 2023 01:34:20 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CDF626B0072; Sat, 8 Jul 2023 01:34:20 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B59038D0002; Sat, 8 Jul 2023 01:34:20 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id A72FB6B0071 for ; Sat, 8 Jul 2023 01:34:20 -0400 (EDT) Received: from smtpin07.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 734D7140110 for ; Sat, 8 Jul 2023 05:34:20 +0000 (UTC) X-FDA: 80987329080.07.6BB57A1 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by imf22.hostedemail.com (Postfix) with ESMTP id B9687C0009 for ; Sat, 8 Jul 2023 05:34:16 +0000 (UTC) Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=NWtGo8zP; dmarc=pass (policy=none) header.from=intel.com; arc=reject ("signature check failed: fail, {[1] = sig:microsoft.com:reject}"); spf=pass (imf22.hostedemail.com: domain of fengwei.yin@intel.com designates 134.134.136.100 as permitted sender) smtp.mailfrom=fengwei.yin@intel.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1688794457; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=TRn/nPzp9hqb3pZ+q4lB06NwUWBtZNoZsL/6AH9oCFM=; b=Jh7WO2o6xjnULyNzYjCMPmWatfc9dX112twtxZSo5I+F5eGu7W/TniVlHkhegXDt1okRPk JYlvI8SJJNdrvslK9Rm0nM7L0bUi05vO1msHqAX9/j2EEPhHOy3MG2aT+V5L9Bx1e1QzJ9 m9KrUR/PVXOgRrGWcfE7BmtlQRqwYsE= ARC-Authentication-Results: i=2; imf22.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=NWtGo8zP; dmarc=pass (policy=none) header.from=intel.com; arc=reject ("signature check failed: fail, {[1] = sig:microsoft.com:reject}"); spf=pass (imf22.hostedemail.com: domain of fengwei.yin@intel.com designates 134.134.136.100 as permitted sender) smtp.mailfrom=fengwei.yin@intel.com ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1688794457; a=rsa-sha256; cv=fail; b=2udxU8aLu9ICi+3v4hD2M8ech6pvrlhXkJw2Hc+FboI14s76jswIxMFWk3Th5pRvKGguj2 IOR9oz5LYWvRVzCe8Saoh7UESTRL5Rgx9yDJHxBH6E5Ouw3GIVqLGKbzT0ulGAy7i92qkr N/Xb4muwK50GL+uR4LG2DS4xy+Xiv/4= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1688794456; x=1720330456; h=message-id:date:subject:to:cc:references:from: in-reply-to:content-transfer-encoding:mime-version; bh=8GeLdXR31UPNpBXynk+PziK7Heio6whpuOIbvW5XhVg=; b=NWtGo8zP97I2kzPifA0PcDSPVAd28luMnQO9t7M1JaF2P2EEEXp6VAGk AA8HspEL4jVLQzyLcHivZeKxLf3U3ETwlY61Ew7w0bMn8cCgrpjD/9JYO imkMDRuxLCNNwgK+pKrYxj25RWXPz8nuNrUgWiTy1s+tuTSrGBsxP7js0 DtAg6AL+poklvARbUqFzHmWTMmhTaDLVqHlm4emK6GrT/bDEDvpeCu+LT 0Awqx8sq4cU/LBZ9oJsJ4qR5956qsp/0UnfNvfVmhiODuAJklfwXJeR6m SvJtNSSRFy9V6fXovetQX/mBBnR4nwd+X/zttkORv0QKyvGNG0XDH9W0/ A==; X-IronPort-AV: E=McAfee;i="6600,9927,10764"; a="430101923" X-IronPort-AV: E=Sophos;i="6.01,189,1684825200"; d="scan'208";a="430101923" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jul 2023 22:34:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10764"; a="697438743" X-IronPort-AV: E=Sophos;i="6.01,189,1684825200"; d="scan'208";a="697438743" Received: from fmsmsx601.amr.corp.intel.com ([10.18.126.81]) by orsmga006.jf.intel.com with ESMTP; 07 Jul 2023 22:34:14 -0700 Received: from fmsmsx610.amr.corp.intel.com (10.18.126.90) by fmsmsx601.amr.corp.intel.com (10.18.126.81) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Fri, 7 Jul 2023 22:34:13 -0700 Received: from fmsedg602.ED.cps.intel.com (10.1.192.136) by fmsmsx610.amr.corp.intel.com (10.18.126.90) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27 via Frontend Transport; Fri, 7 Jul 2023 22:34:13 -0700 Received: from NAM12-MW2-obe.outbound.protection.outlook.com (104.47.66.43) by edgegateway.intel.com (192.55.55.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.27; Fri, 7 Jul 2023 22:34:13 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=j7nHnJu5TqynZFRYP7WzgGBvfr8d+PCLxsKqklo/HTvtvJBFSALm1APVuSCBnQQbbMhX99dlUJkAv83zowNCXSPXFVXisOTjmF6Q5bWA712tLcLJN2iWS3+XqtqSh+sqfkjF9C9I4oyh7o6KWEmswZ2wOGyDlqBhVqUYgSBLBht0/FCPJeQk8UeIO3Fg1NNp7cpg247pwv4rMNx7edrUopkDmQGee0NN7d7aO0ZUbSBUx19eBpkNSapnEiFJVsigGvILrIm3OsdakzTnSZ3UJJRqTlD6VA6Kt6l4ZvBGJOsZyqtBSoOVm04JP1AkGRpVrvf4HWmH+wUzczr1Ufefwg== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=TRn/nPzp9hqb3pZ+q4lB06NwUWBtZNoZsL/6AH9oCFM=; b=GkC09oD9IUn+f5AzFAXjbOBFqRS+NkwWLEGH1zq/2Vn9zweby+lQb1MIAE4Klk/5ozqO9y76ui2mrgNv3dJjvcSLY/n3LpffPmHQnZWwcC94ngKs4ptYwS5yR5g+x9IZK0LUSH9qAd2Wjbjcti0gwCpC+7yquL6ZzVEgokWgq9Mql0yLrkv4aEpK5/wJL4GawVq2shoOggSNuDmy54bD+UNVCy4fVJKBuEI4QoXTdkCaiuAOHvg9vjX47rTItgm32HIRds7Wa+uBOS8WDZBQC9f9Qhsn1MjyY/eLKy8CNVKGCTAS0lQBMlAxHKLT+mWF3c9iHuEbGFRZOyCYk1v0fA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Received: from CO1PR11MB4820.namprd11.prod.outlook.com (2603:10b6:303:6f::8) by DS0PR11MB7651.namprd11.prod.outlook.com (2603:10b6:8:149::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6565.25; Sat, 8 Jul 2023 05:34:07 +0000 Received: from CO1PR11MB4820.namprd11.prod.outlook.com ([fe80::e6c7:a86d:68d6:f2f3]) by CO1PR11MB4820.namprd11.prod.outlook.com ([fe80::e6c7:a86d:68d6:f2f3%5]) with mapi id 15.20.6565.026; Sat, 8 Jul 2023 05:34:07 +0000 Message-ID: <928bb406-f09b-358e-c3cb-72ddd53a2793@intel.com> Date: Sat, 8 Jul 2023 13:33:59 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0 Thunderbird/102.12.0 Subject: Re: [RFC PATCH 2/3] mm: handle large folio when large folio in VM_LOCKED VMA range Content-Language: en-US To: Yu Zhao CC: , , , , , , References: <20230707165221.4076590-1-fengwei.yin@intel.com> <20230707165221.4076590-3-fengwei.yin@intel.com> From: "Yin, Fengwei" In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SI1PR02CA0047.apcprd02.prod.outlook.com (2603:1096:4:1f5::15) To CO1PR11MB4820.namprd11.prod.outlook.com (2603:10b6:303:6f::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PR11MB4820:EE_|DS0PR11MB7651:EE_ X-MS-Office365-Filtering-Correlation-Id: 8153cfcd-dafa-40c3-2220-08db7f74f2d0 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:CO1PR11MB4820.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(396003)(39860400002)(376002)(366004)(346002)(136003)(451199021)(38100700002)(82960400001)(86362001)(31696002)(36756003)(31686004)(8676002)(8936002)(6512007)(41300700001)(26005)(5660300002)(6506007)(186003)(53546011)(2906002)(2616005)(83380400001)(66946007)(6486002)(316002)(6666004)(478600001)(66476007)(66556008)(6916009)(4326008)(45980500001)(43740500002);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?U2w4V3pTaitNcmswbkprYXA2Q1BEVjdralZDNm9Zb0RkV3NBV0dGQXFNY201?= =?utf-8?B?Mm5IN2VCVHh4ZjZyKzMrd20xY1E5bEdvUEcvVExlVENyRjFnQVczTkhrZGVj?= =?utf-8?B?ZzM1NWNOeUpEZVNQUWdqQU9vMy9hcjNSK2tXQzhvdnhQNjdERDlIWEZQaXpk?= =?utf-8?B?bnlDTXpqaUN1MmgwYjFpSWZzUHFIMnRwTjE4akZ6U2RHWWNMQTlsS2xQVmQv?= =?utf-8?B?TzlJUDUyM3JITjV6cHp2bkN2Y0JYZzdyWWw0OVl5WHRNZHFxSVVwMGs3THR5?= =?utf-8?B?QWxOeTkzSGJYRVBDNXAyNHVhN2p6cVlUOEtESE9jenNTU2xUYnRudFhkbkhU?= =?utf-8?B?MUVCcHJiaTc5SWI5WDE4T29MdDcxVWJBYXVITjBQOEl3eE9nY2VnNkZaWmcx?= =?utf-8?B?MHBIbXFsQk00ZklhYkFDeGpWZVRnNlY5YzJBaUlrQkFXU2JFOFFSY21ZOEpp?= =?utf-8?B?ZUF6RnY5bDA1NXZ4WXNteDh6MjRvZG1zbjU3QmdrdGlHY3pXb3QwU0l0U0dV?= =?utf-8?B?M09ndjNCMithNzNzRkJTcGFXYkcvcTBPMC9FS0plaXVEa3d5eXI1NkdlMWhZ?= =?utf-8?B?MkExUWhITmxtK3YyMzd1S1dLaERqaSs5byt6NWNvSWlLUnM0VHVkN3pJZVkw?= =?utf-8?B?MVRkTmVOc1FSQTFZRU44TTZob0lNR2JpZWkrMTZYbGl4Y2hVQ1QvczdNU05V?= =?utf-8?B?RW1vMk9VeWpVM25raDh4bVdrazFmeGM2UituaHp4eHZjeHhzN0I5SnJlS2Z0?= =?utf-8?B?bmdjQXVtYXpycjhrMEMzMFdXZW9FcEJyd29qeWsxMjdFRk9tWkUxcU1Bd0lO?= =?utf-8?B?Z0JQQTNkdzhUOG9mVjdMZ1FwaDNZNkdYbUo4aW5DcUh3WWRNNHZnT3Jra0VI?= =?utf-8?B?bzZVMGRod2RySUxzUlNwNHNoM2UxYjdmWWFqR213RmJ6VFpwS2RMSDI5b0M3?= =?utf-8?B?WXZiQzAxZ1VFVVdEQnZ2N0hSNjRqWTlOU00yV0ZWN1JiTmRtcU54L3RXK1Jp?= =?utf-8?B?bnJFOHdqMVA1S0Y3NDNZdGZEeEhocyswbCtFc3ROZStKRTFEaDNNZWVTdjlX?= =?utf-8?B?VkhkUW5qTEp6dkNrVENwZ3F0aWYzUDRUbk9BRjRCakMwdEtucDdCNEhtQXgz?= =?utf-8?B?b04rQmtocE0xRWJ2NEVWNitSRENEdUZhdmw5UkRrb1RzSzdxcWJaMUhFWWhk?= =?utf-8?B?VUcrQXFERWYvallpcW9zODB0aGFIVGNEUTlnaUhnMDd5Szg2bHlqRmduTW9F?= =?utf-8?B?bU9vUDBZYVhsbUdxTFkrUkZwcTN6REhlZTNKQ0szM1I0ZG5UZkZRMFdjUzQr?= =?utf-8?B?OWpyRk1sVVpWR2l1Q1psYWlSVmR6dncyVUhQYURqaUI5eDdEVkxCZVlzNmp5?= =?utf-8?B?WjVLcXlPaU5ON0JnVWg2bWZyMjE3TnlkcmdrdCtrMHQ1cXVQeldaTVV0c2d0?= =?utf-8?B?a08zYWtBTVRtZXNwRElGS0R1ajc1M2xIT1VScERiQktYUklseW1tUVh2d3FL?= =?utf-8?B?eTF6aEFEenM5UjUxeVRkN3RmY3JjeUxCNkVZYk5SdkE1ci9QTVF0YjlZOXdE?= =?utf-8?B?c0xveWJMQjhxVkFMWjc0S3VqZ1BUWkRKREZUWGxjYW04YUltWUpEMEt2WDRV?= =?utf-8?B?MG0xUmsvNStVdzRjeTg2eUJ1S3dCRzhyUUcrQVhFNUZnNE9lSmpJNEpCQ2pj?= =?utf-8?B?ZDNINGpzRVdsZW81d2RSUzZ4VVQ3eU92Zy9MTmVwWVhsL3RmQ2hTSXVGaFZC?= =?utf-8?B?ZHBYWU9sUWszUnVyZERIdXpjbHFJZzRLQWNCbEZORnVBYUY0TjZGNEJ1QjhG?= =?utf-8?B?dDdCWE0zLzBrb3JpNlhIbVV6WWdwR1psSm5SZUVwZGNObFBzOFZhVDE1NXkr?= =?utf-8?B?TFBCeW9IQm8yclF3QXZsdU95OWsycFpOMkhUTENIaDI0VFRJM1RORnJBMnFw?= =?utf-8?B?VEZaT3RsZVh3cktySnFBdlB3RVRKZ2xFYnFud3pmZGJscUt4QWRDeW1JYVZ6?= =?utf-8?B?Tk5rMkJjbjJxRjc0ajJaMVdVY2JrdGhZK1NWZDFpbXdGQ29KYUpFOC9lTEpx?= =?utf-8?B?K2dFV2FNSnlXVzcyWmt2VzdOVkI5K3lWK3VKZFNiYlcrazZkbmIzY0o5NGZu?= =?utf-8?B?ZDZ0SGw4Tlo1N2JmZlBEWWl5UFQ1d2h2bjl4WmNBV3F2WUFpaGgweFp6STRI?= =?utf-8?B?NXc9PQ==?= X-MS-Exchange-CrossTenant-Network-Message-Id: 8153cfcd-dafa-40c3-2220-08db7f74f2d0 X-MS-Exchange-CrossTenant-AuthSource: CO1PR11MB4820.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jul 2023 05:34:07.0506 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: TiHhaFqvZR4tfeiJUFPWbJjsWwclVwBpBZakdrU39rzp6AiwXDlvHWg2gRGwCLjxwUuCpv6IiPYQmyyxTT8XOg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR11MB7651 X-OriginatorOrg: intel.com X-Rspam-User: X-Stat-Signature: f6mzwinzde1b8dn7uxi3gkyxfm3ma69h X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: B9687C0009 X-HE-Tag: 1688794456-207395 X-HE-Meta: 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 GZUdL+rL 6i8XqUJU9VNQCFl/Ft7qnFRnurZtbw5YluvgA5DOKkN/WdhpWNzjb6zen3ssAptk05/M/6z8RKIBMa/2/85PUL34XmrNxA1BPyEiCvuDEOhd3v+pG8I24ic7hfzZ7nKPszw48QC1jG0l/Lh0joyPNdcFFlBDI2kEJ8DBV0+VLWPGQ7oE47Lm1AyTkBsCznE2QwaDtqzvpo5IF2E9VQlcq72R51B/jL4Xgd9pwKykUWWsWnFVrtsMlkZTOsg30Ftn/1T2l1wX1DCwBkj55Xii8l5g/aoeMi93xbeG6Gb1WG1fnZUERYzYBrcu0HzZaJW8g793dKwgADc/M3ufKXJ4xcezwbqvicGxaUJdU X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 7/8/2023 1:11 PM, Yu Zhao wrote: > On Fri, Jul 7, 2023 at 10:52 AM Yin Fengwei wrote: >> >> If large folio is in the range of VM_LOCKED VMA, it should be >> mlocked to avoid being picked by page reclaim. Which may split >> the large folio and then mlock each pages again. >> >> Mlock this kind of large folio to prevent them being picked by >> page reclaim. >> >> For the large folio which cross the boundary of VM_LOCKED VMA, >> we'd better not to mlock it. So if the system is under memory >> pressure, this kind of large folio will be split and the pages >> ouf of VM_LOCKED VMA can be reclaimed. >> >> Signed-off-by: Yin Fengwei >> --- >> mm/internal.h | 11 ++++++++--- >> mm/rmap.c | 3 ++- >> 2 files changed, 10 insertions(+), 4 deletions(-) >> >> diff --git a/mm/internal.h b/mm/internal.h >> index 66117523d7d71..c7b8f0b008d81 100644 >> --- a/mm/internal.h >> +++ b/mm/internal.h >> @@ -637,7 +637,8 @@ static inline void mlock_vma_folio(struct folio *folio, >> * still be set while VM_SPECIAL bits are added: so ignore it then. >> */ >> if (unlikely((vma->vm_flags & (VM_LOCKED|VM_SPECIAL)) == VM_LOCKED) && >> - (compound || !folio_test_large(folio))) >> + (compound || !folio_test_large(folio) || >> + folio_in_range(folio, vma, vma->vm_start, vma->vm_end))) >> mlock_folio(folio); >> } >> >> @@ -645,8 +646,12 @@ void munlock_folio(struct folio *folio); >> static inline void munlock_vma_folio(struct folio *folio, >> struct vm_area_struct *vma, bool compound) >> { >> - if (unlikely(vma->vm_flags & VM_LOCKED) && >> - (compound || !folio_test_large(folio))) >> + /* >> + * To handle the case that a mlocked large folio is unmapped from VMA >> + * piece by piece, allow munlock the large folio which is partially >> + * mapped to VMA. >> + */ >> + if (unlikely(vma->vm_flags & VM_LOCKED)) >> munlock_folio(folio); >> } >> >> diff --git a/mm/rmap.c b/mm/rmap.c >> index 2668f5ea35342..7d6547d1bd096 100644 >> --- a/mm/rmap.c >> +++ b/mm/rmap.c >> @@ -817,7 +817,8 @@ static bool folio_referenced_one(struct folio *folio, >> address = pvmw.address; >> >> if ((vma->vm_flags & VM_LOCKED) && >> - (!folio_test_large(folio) || !pvmw.pte)) { >> + (!folio_test_large(folio) || !pvmw.pte || >> + folio_in_range(folio, vma, vma->vm_start, vma->vm_end))) { >> /* Restore the mlock which got missed */ >> mlock_vma_folio(folio, vma, !pvmw.pte); >> page_vma_mapped_walk_done(&pvmw); > > It needs to bail out if large but not within range so that the > references within the locked VMA can be ignored. Otherwise, a hot > locked portion can prevent a cold unlocked portion from getting > reclaimed. Good point. We can't bail out here as return here means folio should not be reclaimed. My understanding is that we should skip the entries which is in the range of VM_LOCKED VMA. Will address this in coming version. Thanks. Regards Yin, Fengwei