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 33DB8C3ABC9 for ; Thu, 15 May 2025 14:50:06 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A6FD16B009F; Thu, 15 May 2025 10:50:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9F5C46B00A0; Thu, 15 May 2025 10:50:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7FB486B00A1; Thu, 15 May 2025 10:50:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 5D47E6B009F for ; Thu, 15 May 2025 10:50:04 -0400 (EDT) Received: from smtpin30.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 00B5656376 for ; Thu, 15 May 2025 14:50:04 +0000 (UTC) X-FDA: 83445427170.30.0EB6901 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by imf20.hostedemail.com (Postfix) with ESMTP id 410DF1C0004 for ; Thu, 15 May 2025 14:50:01 +0000 (UTC) Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=H+M76nJ9; arc=reject ("signature check failed: fail, {[1] = sig:microsoft.com:reject}"); spf=pass (imf20.hostedemail.com: domain of ira.weiny@intel.com designates 198.175.65.9 as permitted sender) smtp.mailfrom=ira.weiny@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1747320601; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=vnhRb+mgWm7K8Z7yR2Pp9WTJzZeiyBtbhvtVf+LYTAs=; b=i0lkov/A1eQZVGnH38LTQV+kjJ0xhoEiYyWaS4ra0cr2Av35LfxX/Gvg1tGnoqBd3LfoHv SpOxswLXDPxhfz4C300uNqUqyVwZPPL1jRK1yhJk/o7EIlfg6Ob8Z1Kgqp/rordZwvrGd8 lOUbSOuzRXAScETEYD6bf1FnLxJWR6I= ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1747320601; a=rsa-sha256; cv=fail; b=qBswOC0tNALR9LGPFiTladArMjtb3wCT5KspoTfARIY8yeSt2favjBhALxGu+R5zadKsWP vv7B/Q+oJVZNETApEtwRWA0tklxS4R2DjKJhjO0C9nC0V6iiGNCKHvcnbPqRUYp3TOsbrP 5N+wT1llcehweUtChTHayUWJSpDmmdQ= ARC-Authentication-Results: i=2; imf20.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=H+M76nJ9; arc=reject ("signature check failed: fail, {[1] = sig:microsoft.com:reject}"); spf=pass (imf20.hostedemail.com: domain of ira.weiny@intel.com designates 198.175.65.9 as permitted sender) smtp.mailfrom=ira.weiny@intel.com; dmarc=pass (policy=none) header.from=intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1747320602; x=1778856602; h=date:from:to:cc:subject:message-id:references: in-reply-to:mime-version; bh=UsBLHT6hmOmZyql79FrxttauCj2DYE0rjwn8+01PCZo=; b=H+M76nJ92Tzbzb6YFQ+PiEuFvQKfRGGTerXOYkTlvqxZ0slNwqp2enfw PPGpAtq1Svy+Hb3Ad3Yh7htgGtMI/HLP6TnQ89sSojXCF2426wWcNmLKy xtrJ/KofBCC2S1nOp+RaMp6hy8MoCW/EHt9GDVBZ/anAxXEkjvDE8lXQi KGJILy0tULupQSY3OI09LmZjP67sybG4I1WOX5UF1tiZ95CYlVQG1rk+9 mR9K6wmjmgO8OmSqbush1nECDUxONNr5PzOb3Bdkyu3cY2zFAbGM6RqNm Y++Zw6uYQSIl7mDrhzaMCyZjoFa14DNbOdVCOFWMLNnF7la47uFIM0Z2/ Q==; X-CSE-ConnectionGUID: IH3pKo9tSBeT3dFLmJ1pMQ== X-CSE-MsgGUID: cZipjjFuQZ6Rt+A6Kt/XLA== X-IronPort-AV: E=McAfee;i="6700,10204,11434"; a="71773038" X-IronPort-AV: E=Sophos;i="6.15,291,1739865600"; d="scan'208";a="71773038" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 May 2025 07:50:00 -0700 X-CSE-ConnectionGUID: +y6Flt65QmeRZeQN7fBqqw== X-CSE-MsgGUID: jfKfrMa3TiSfWhLNx8jFQA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,291,1739865600"; d="scan'208";a="138119653" Received: from orsmsx902.amr.corp.intel.com ([10.22.229.24]) by orviesa009.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 May 2025 07:49:59 -0700 Received: from ORSMSX901.amr.corp.intel.com (10.22.229.23) by ORSMSX902.amr.corp.intel.com (10.22.229.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.14; Thu, 15 May 2025 07:49:58 -0700 Received: from ORSEDG602.ED.cps.intel.com (10.7.248.7) by ORSMSX901.amr.corp.intel.com (10.22.229.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.14 via Frontend Transport; Thu, 15 May 2025 07:49:58 -0700 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (104.47.58.176) by edgegateway.intel.com (134.134.137.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.44; Thu, 15 May 2025 07:49:57 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=TS9a7azZBneZlW6SIeGl7mQAKurBnM1H/AbvOcIp6bmGaYef2+k7DQsXa8RtFwgwNiRdeGPnCcEMbuTn/fCkVuPzoUPnuYZqdz6rRCftUrBPa7b1AVcqtS5csgVM28pPk/EKMYklKyqstSNNG8KVu9O/lrIm6Bsf6G4+edNrIOdLeDKjRrCkRl5jIf58XBF/N+ndURRI3mww0zxYqiy4A4l8dI/vxQ4EgqQ0NT4SXxvd3/3oGChjy9ClNryk7WuQlFOQDlHVZaNd+uW8S+NX6DFvdZC5s56xqEOBj0+gc/0IJTHbHgxC1AOYyrc+xMAuMnLdXLGP3hD6VP/2NKXc6A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=vnhRb+mgWm7K8Z7yR2Pp9WTJzZeiyBtbhvtVf+LYTAs=; b=W+THiCZBNQLIBMR1Qoew+Se0sfqOpkIE5Ir6Qv51pgiSagi05A90GbS69bytmyIaOJ66eOZs+142W2Vs6KEes2o/ptvLT64EFFPa3QN3wwrxcsDBWdzOw16oqxybdnxb/Yf765hRMuxZ8hjAiBcI3sd6cvMGjg9zLKkw5LvVY1m3Z5Xjo4DqBMtS95kkY+KKvH/u3QYxgmaNUEagjv/NZI2vL38I+YKLmA1Lc+mCt2wvD8As3gwEe22WxzFT2ASJC/htctum13TZl/vfkNOyxeRhy8ymZ6L2/hL5BpGOJfznch1CNQ4EuImW5qvQ/S0MTLmonNYAWNmyiVYvZNAThA== 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 SA1PR11MB6733.namprd11.prod.outlook.com (2603:10b6:806:25c::17) by IA1PR11MB6146.namprd11.prod.outlook.com (2603:10b6:208:3ee::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8722.29; Thu, 15 May 2025 14:49:53 +0000 Received: from SA1PR11MB6733.namprd11.prod.outlook.com ([fe80::cf7d:9363:38f4:8c57]) by SA1PR11MB6733.namprd11.prod.outlook.com ([fe80::cf7d:9363:38f4:8c57%6]) with mapi id 15.20.8722.027; Thu, 15 May 2025 14:49:53 +0000 Date: Thu, 15 May 2025 09:50:26 -0500 From: Ira Weiny To: Ackerley Tng , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [RFC PATCH v2 04/51] KVM: guest_memfd: Introduce KVM_GMEM_CONVERT_SHARED/PRIVATE ioctls Message-ID: <6825ff323cc63_337c39294e3@iweiny-mobl.notmuch> References: Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: MW3PR05CA0020.namprd05.prod.outlook.com (2603:10b6:303:2b::25) To SA1PR11MB6733.namprd11.prod.outlook.com (2603:10b6:806:25c::17) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA1PR11MB6733:EE_|IA1PR11MB6146:EE_ X-MS-Office365-Filtering-Correlation-Id: 042f48ff-290a-4286-1316-08dd93bfc03b X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|366016|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?vi4bloaL3+wxjkxntI3yPAzkRYHvLnezCmHpJ5nd/l6q+qzkEymQQc+CNBAd?= =?us-ascii?Q?biwcOTIJO5/pVZWeTW8FPE++mlTCaMRYj/B73hyWqBs7+oW8xOONO7Qdi3kb?= =?us-ascii?Q?iVYPSj3lxxPVqmkKtiNzXM4vkA97QzlgroZvjO6K9jL5AsiGsaSR507s+YT9?= =?us-ascii?Q?1UpHhe1ISVdXijBE+Z7SQYLUfaRDWYL+OxmZE4O0/aNYnC37zEzJjjkO7Dcj?= =?us-ascii?Q?4qu6YpvDEPLztcd6lXpH11j0ku0+vcj3MrD5juezHkJdUdx+MCN4zNUWYwOJ?= =?us-ascii?Q?CUSzEVXVfpifKziCIyQW7pLzvj8sUn6TSW/bLKyI74VBCcdVSihp0S+/mWwH?= =?us-ascii?Q?9WAens9TtvtkTbjIF4CBznuhSAL6cyBfeHTFo7zdCWQ1ja4NkmRmfndgUQoY?= =?us-ascii?Q?rT4UFWGzfYD/QsCmsfkkcNhp38Rs/nMG4kL+waqNbyYVGbpFDju7rvBEX8Kc?= =?us-ascii?Q?VzrKJrRuXbdw054NXjABduQfsaSph8zdQoaxAOLp7+xTMiNkutT6/CN5fNSI?= =?us-ascii?Q?NF5ooM9H8KonkRCVOOe8Zw3B08eblh1lDi2WbxHdVs+U+KwH5T+O6nwOgv8f?= =?us-ascii?Q?ke6xAFN22MIbX5rVRxy/6r58JYt/6pV5rbevvLxqq30qIsOx4uRKuOyhoOTn?= =?us-ascii?Q?DydGNXmAv006h22URwUpJ41ErgiZI4dI8XQuccs/JRNj5V0YpynNRKxjtXzD?= =?us-ascii?Q?lt2Qc8WplMh8op+GHc5EtV26jF6Iydv9T0XCZOKpyxHklqO9vPehpwwb5vMg?= =?us-ascii?Q?QExTCd20+y5ZJsh6frDm8b+HYpd9V2HkkApwhhDXAVxBUI5MxbamxQKXdE0G?= =?us-ascii?Q?6aOJ9BmWCehxerfiDcPYZRCXY37qhg24NJDHU5iBpBqBhBr/Pa6eq6gZL7Lj?= =?us-ascii?Q?wtxxo7QvxY2OOasGEj6622ImQZRbZqlgXirpnYb+w65ol3gyAdB+AqxSMAlV?= =?us-ascii?Q?Ts9geK3IODaiTzR9NHSImt6ZbfjcJNXGLOseKeDGw90dH5on4zAo/QDHyLEz?= =?us-ascii?Q?gurls1reoFrlCdHAyAS/m1E8my9owPUMlEU00+WqLmx4FeghMgbXJzZ+6sKZ?= =?us-ascii?Q?21LB3qTqDCDvc4D/XOf1yYkcaTCrWEZouxw31hgAy8HU6wNXHNStA0tBIPny?= =?us-ascii?Q?xi42g+8Vdaa9sRZKjwFmsV2mVCKi9zX63Xp/3TXdJ7yh4y1hqO9pMZ6DRSqb?= =?us-ascii?Q?xnry6Cxm1UuaoHnWGXmgg4aEOWaj/M/9HQJ34ultVUP//XPfagWZKKdhESxm?= =?us-ascii?Q?bEpTgbiIMAt6Tg+AoRiPJj4Jnl+6zwLyWgIleLDc54OGDnw+E7HTwokyjl8m?= =?us-ascii?Q?ChyOAFHvN6OgaiMv9vaLmO2BEWEL3x6o6E5OFZ0U8YYOheE1XzmnMwK10EbV?= =?us-ascii?Q?yZIZatHU8F3CFOownyn/8FOiMsi5rG+JsCRTo/TCE4NmrNxfykduB35KW8EI?= =?us-ascii?Q?CoORUK9wy5E=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SA1PR11MB6733.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(376014)(366016)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?RaMC3/Y9/NJuvqD6JbrmFfpFkAVcIkNDgTzhMpTJTujdI2Z0tBJdSYSDEej8?= =?us-ascii?Q?bUBgiCHIgyn7jcrEjmmtPNtKdIDgL5wHCcuphwi5SKYEVCqUKRlqrmKQk7J9?= =?us-ascii?Q?g+MIqJrKgcRFS78fyWGHBvJdX65iidmuWm2XMjIPZ7RdQY9eE7MuQiSR4K4h?= =?us-ascii?Q?PwMQ6TEQx/sZmat4bxTq/apalhNN3jdhMwE08wBn1Za2DpetBf9Q+8zxfDR+?= =?us-ascii?Q?mGrpGzQgBFF8RiFHcCC5QWprsEYvDVLnwY3P1fEArIK0rlUGsGkjd0V1Ch4V?= =?us-ascii?Q?cyEX+E64rRMRNaYKRq+nh4N8UJbBSoi4tBMX2EwqiN19OW6EBrL96I+bCfRz?= =?us-ascii?Q?23x4QqY1gpcPrZJRveF0hd+WxA0bsJCaqqD2euvTE/tY3Nmo1EOVpefKxuJg?= =?us-ascii?Q?iq/dUzuZutBLRmlO5sREDRDqrVZqps3sM+RCl4XbMz5H6gktlAtBcBmnUVVW?= =?us-ascii?Q?ROF8zjxsLBHFLmyS4jlnoNMqbNWvAAyTGb4Fz6OnFt3PE8UuNeN7LPjkM5YA?= =?us-ascii?Q?wpHd41SaVYL66zK2gOcUw5n6em3Y1MNPieyLrgDqQNOcPnPIRWyaZTCZe8de?= =?us-ascii?Q?zJHVEkktv0lsrbfPX/X/it+1eiL5iWZ0BNf9tvKK200yISWac0qtVFSZMXfb?= =?us-ascii?Q?VMRFLJuBtbW68Rd9Uxq542FoxU8Mbe8paUzHSP5O5pMTHLDw9+FVUWo0YQi6?= =?us-ascii?Q?EuLj23Urb91mranRgtdPucB7TFol/e6hexylqoqc0Hr1Pojq+gkiTiEMiRZM?= =?us-ascii?Q?gkX7r3fw+KGXTqLlUE0MBRwiz20NbaDe9r1MI1Zqi83E2sp++2Kn86QvLTdd?= =?us-ascii?Q?5UAM8jSB2ol5uo3G4kWcdYyjk7OwRkE0tUpMlKjkgPlz/ehKYwRTfs+sz52e?= =?us-ascii?Q?TAQXDe/GvNuyEPSA/eVuCD0mtj+dGd7F7sP2d/rooA9wg+rqyMJnBZNFDMbg?= =?us-ascii?Q?NnmL1uZiLc/dM0ILFp/PDPm+0djBYoHddOlHOWdz6lsHhWEsAeCXtyqGm9oa?= =?us-ascii?Q?NZqUiSivGEGZOSKnxuaqPVG1BjsJgv2MBEauYOeL0Iun0PKaGDTT3wzGYjL5?= =?us-ascii?Q?mUHzv+pInVagSij2UjzViX1vBLIYTieZUa5/m1eS0YY+eYhYpxLvwXt1U7eL?= =?us-ascii?Q?N/Bd9Tfzkm3Wh7y1kdMRm3zPkEWApC603UGpPbbCcrUNCAqR9u5mnrJVO/Y8?= =?us-ascii?Q?XzYj6nu7I+jyUXAEvLj/46G5GN2LOXYMAe8haAlXGOfJoglZOzF2CdVvUDnC?= =?us-ascii?Q?3dU2vcsFRo0/Of1D5fBwr9YHYt0sOVkV3X/WiEBjWodWy2BRzJz/XBCwSiPQ?= =?us-ascii?Q?WZpwATiPXPP/HRh6GXePmy9uae76LUS4u8Yg+76kjs0rA8jrRuf0e81ye6Kr?= =?us-ascii?Q?B1InqLWXmdst7TbDec/943Xu3vPk1VATpnUjrJkrk8cJd9ANvt6IqtK62KHl?= =?us-ascii?Q?ldEcVzDeul5OecCJo8nBPSLC+WnjSrdYWNIQkeuu9vXWXNECaRmpA9GLny3r?= =?us-ascii?Q?p52NmyUITZCX36WW+HHFWrR3pxPRQuVGUFXmr5lCory2xdCGCQjvJlfHu4Zj?= =?us-ascii?Q?tkY9lPfdeJWHofY5E068gTNg28Y4NRVSsrU9QpRB?= X-MS-Exchange-CrossTenant-Network-Message-Id: 042f48ff-290a-4286-1316-08dd93bfc03b X-MS-Exchange-CrossTenant-AuthSource: SA1PR11MB6733.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 May 2025 14:49:53.1862 (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: qaXVDZJOFsVZNkzuavzulcZSGEPSsllDCLwnp4Yyt4EpwTsT8MN4BaaUv9KmmI3t4Q1RJfE0K/PcYpM3GrQRHA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR11MB6146 X-OriginatorOrg: intel.com X-Stat-Signature: 9af1bdikcq7ttst3hq1tyjkunap7o1oi X-Rspamd-Queue-Id: 410DF1C0004 X-Rspam-User: X-Rspamd-Server: rspam02 X-HE-Tag: 1747320601-188476 X-HE-Meta: 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 /BEIcP8F 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 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: List-Subscribe: List-Unsubscribe: Ackerley Tng wrote: [snip] > Signed-off-by: Ackerley Tng > [snip] > diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c > index 590932499eba..f802116290ce 100644 > --- a/virt/kvm/guest_memfd.c > +++ b/virt/kvm/guest_memfd.c > @@ -30,6 +30,10 @@ enum shareability { > }; > > static struct folio *kvm_gmem_get_folio(struct inode *inode, pgoff_t index); > +static void kvm_gmem_invalidate_begin(struct kvm_gmem *gmem, pgoff_t start, > + pgoff_t end); > +static void kvm_gmem_invalidate_end(struct kvm_gmem *gmem, pgoff_t start, > + pgoff_t end); > > static struct kvm_gmem_inode_private *kvm_gmem_private(struct inode *inode) > { > @@ -85,6 +89,306 @@ static struct folio *kvm_gmem_get_shared_folio(struct inode *inode, pgoff_t inde > return kvm_gmem_get_folio(inode, index); > } > > +/** > + * kvm_gmem_shareability_store() - Sets shareability to @value for range. > + * > + * @mt: the shareability maple tree. > + * @index: the range begins at this index in the inode. > + * @nr_pages: number of PAGE_SIZE pages in this range. > + * @value: the shareability value to set for this range. > + * > + * Unlike mtree_store_range(), this function also merges adjacent ranges that > + * have the same values as an optimization. Is this an optimization or something which will be required to convert from shared back to private and back to a huge page mapping? If this is purely an optimization it might be best to leave it out for now to get functionality first. I have more to review but wanted to ask this. Ira [snip]