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 A216AC27C55 for ; Mon, 10 Jun 2024 21:28:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CAA3E6B0093; Mon, 10 Jun 2024 17:28:18 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C317E6B0095; Mon, 10 Jun 2024 17:28:18 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A0F366B0096; Mon, 10 Jun 2024 17:28:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 78B976B0093 for ; Mon, 10 Jun 2024 17:28:18 -0400 (EDT) Received: from smtpin25.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 2AD71C02BC for ; Mon, 10 Jun 2024 21:28:18 +0000 (UTC) X-FDA: 82216267476.25.60F35AF Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by imf10.hostedemail.com (Postfix) with ESMTP id 3FC76C0003 for ; Mon, 10 Jun 2024 21:28:12 +0000 (UTC) Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=oFtemPpx; spf=pass (imf10.hostedemail.com: domain of oak.zeng@intel.com designates 198.175.65.9 as permitted sender) smtp.mailfrom=oak.zeng@intel.com; arc=pass ("microsoft.com:s=arcselector9901:i=1"); 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=1718054894; 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=BhY3NwRliREZRdNNM43bZ3OvIln91I1pxlVbr1nPbP0=; b=XV9V2Pm5TSp5hdPKODqgWTDnyTwJXur5gaTYBiU6rVDSBjVAQKLep/CvU5vvumBMzqDDrs Qi9WinyzwVo3SeNiy6vbC6VB9sCwY+JNbpElDzMwj0M/5V56gog+jfOPNaKOBv/YSMUdCA DL9Pn9MulPVBOXFRYjc/huBQOANjZqw= ARC-Authentication-Results: i=2; imf10.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=oFtemPpx; spf=pass (imf10.hostedemail.com: domain of oak.zeng@intel.com designates 198.175.65.9 as permitted sender) smtp.mailfrom=oak.zeng@intel.com; arc=pass ("microsoft.com:s=arcselector9901:i=1"); dmarc=pass (policy=none) header.from=intel.com ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1718054894; a=rsa-sha256; cv=pass; b=dPfracjnP8ubcsQZOeZuLQhXGCvZJ080Gj4Gu3SvSpBUeir/FZttue/4iECwM1FmVNyCP+ klLL7t41s3fE1OGg8Ydl3Pf76LMsbTQE/js8S1PafTIJ5chKocFQsL0Mo07el2Q16vh0Gb SXUBPPDFD9VYuknE8WqKD9L4DA828+U= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1718054894; x=1749590894; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=BhY3NwRliREZRdNNM43bZ3OvIln91I1pxlVbr1nPbP0=; b=oFtemPpxWTypS9ijDnPWXFm67Wa74JYhaC3EO0oMTE1ZfAnbBxwPO+Nt Cs0IB2XNKeZggHWiudT6MBVAzIsz0ZzMQ/X7rdk6D1W7r/Z5le3IGa01A eBMC3Fk1Sjnq0RPNOdzsmonHj/052gmpHUQ9GUU7usYayiLzbwRKSl93m eRFrfIsVJEKQrtzspZz69i56t5lIg1RjFJasTLNHfMWX9DHPe1xTA7tiH Wzp/zJVqaVfsIbcBhUJCiZXoVSnkbejKBuC2dlIqUQITymnFVGMjUYQVA 4NPfzsT8YsRjGxhPQEfTY6Qt3pl+tZxz08y3xIpIRmhAnX7xVWfYRiXwz A==; X-CSE-ConnectionGUID: BeF42E7CSSWZH1cac0IEDw== X-CSE-MsgGUID: KCS8nd5DT+CydY6GisM4AQ== X-IronPort-AV: E=McAfee;i="6600,9927,11099"; a="37262134" X-IronPort-AV: E=Sophos;i="6.08,227,1712646000"; d="scan'208";a="37262134" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jun 2024 14:28:11 -0700 X-CSE-ConnectionGUID: eUv3vfAtSeaYz9bX1BbdJA== X-CSE-MsgGUID: Svj42NBxR9+Im31HyZocDw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,227,1712646000"; d="scan'208";a="70356682" Received: from fmsmsx603.amr.corp.intel.com ([10.18.126.83]) by fmviesa001.fm.intel.com with ESMTP/TLS/AES256-GCM-SHA384; 10 Jun 2024 14:28:10 -0700 Received: from fmsmsx603.amr.corp.intel.com (10.18.126.83) by fmsmsx603.amr.corp.intel.com (10.18.126.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Mon, 10 Jun 2024 14:28:09 -0700 Received: from fmsedg601.ED.cps.intel.com (10.1.192.135) by fmsmsx603.amr.corp.intel.com (10.18.126.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39 via Frontend Transport; Mon, 10 Jun 2024 14:28:09 -0700 Received: from NAM12-BN8-obe.outbound.protection.outlook.com (104.47.55.177) by edgegateway.intel.com (192.55.55.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Mon, 10 Jun 2024 14:28:09 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=oQ5wiXLJ15WP5CiENgk85WPGtphz7Lx8JjcU66zgA5Y4/2brtokQIQIBEr1Z1F2zDoZfzDetKF4McOn61kl3Ma3QmuBKLVx6hLSwbOoFr6TgylFDg+3p9SJg4W0pDZWuGquhW7xQZErwmNWfmb3wt98NUUAn6IvcFARHvYpjxkQYIDiKSlqaFOyTjyHQJ3kL4Sl2ZCZDXt5Hw1fkn4atcyt5MtVO/qnFb/q3vNK5QxsSU/4ywqMcYRM2ndJ83zWWXj3gPQq+SFHShRDMkwDiWQ+mCcVAzBJq/jyFVMX8oYlgaN3/W0ZPkcGn/qNH6sp9eL+mjRjyFx2q+JGKHFf8fA== 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=BhY3NwRliREZRdNNM43bZ3OvIln91I1pxlVbr1nPbP0=; b=O0evvpLs2XG6aet3YtmvsdPNUOgD3O87I+MxhWst91/N8In3Yr6GYRhQgJAZIpwZV0A2bXjsvi2/7QY1mUW1+BeNJBvh/Bjz2OPsmpGrXEshrI0KyI7oIz5sIQ96eD8DpwvARQo8LePwOjJ3SVD8kHdf7IcD+01nsaN6+IDvDMgdfIM2LAJAynleX7K5nJgncjxiW/Ie6b7pm6b3fJ+VEYAN18PCLK+M+NKEQfkkpkFrK28rXvHs/w/mlY8Iy8UDAblRA/BnLjmedLm6RP7MMgP2xI9+lPEMVs5eKPfokNx9M4ABnaLx3Vn/zC4i/Yljy6VIzthVaT07DWKvmzXSow== 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 PH7PR11MB7004.namprd11.prod.outlook.com (2603:10b6:510:20b::6) by MW3PR11MB4569.namprd11.prod.outlook.com (2603:10b6:303:54::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7633.36; Mon, 10 Jun 2024 21:28:04 +0000 Received: from PH7PR11MB7004.namprd11.prod.outlook.com ([fe80::8c26:2819:d0f9:1984]) by PH7PR11MB7004.namprd11.prod.outlook.com ([fe80::8c26:2819:d0f9:1984%3]) with mapi id 15.20.7633.036; Mon, 10 Jun 2024 21:28:04 +0000 From: "Zeng, Oak" To: Jason Gunthorpe CC: Leon Romanovsky , Christoph Hellwig , "Robin Murphy" , Marek Szyprowski , Joerg Roedel , Will Deacon , "Chaitanya Kulkarni" , "Brost, Matthew" , "Hellstrom, Thomas" , Jonathan Corbet , Jens Axboe , Keith Busch , Sagi Grimberg , Yishai Hadas , Shameer Kolothum , "Tian, Kevin" , Alex Williamson , =?iso-8859-1?Q?J=E9r=F4me_Glisse?= , Andrew Morton , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-block@vger.kernel.org" , "linux-rdma@vger.kernel.org" , "iommu@lists.linux.dev" , "linux-nvme@lists.infradead.org" , "kvm@vger.kernel.org" , "linux-mm@kvack.org" , "Bart Van Assche" , Damien Le Moal , Amir Goldstein , "josef@toxicpanda.com" , "Martin K. Petersen" , "daniel@iogearbox.net" , "Williams, Dan J" , "jack@suse.com" , Zhu Yanjun , "Bommu, Krishnaiah" , "Ghimiray, Himal Prasad" Subject: RE: [RFC RESEND 00/16] Split IOMMU DMA mapping operation to two steps Thread-Topic: [RFC RESEND 00/16] Split IOMMU DMA mapping operation to two steps Thread-Index: AQHanOEtbi0VHTnLn0mNwgftYB7xRbGEmFqggAEftYCAO5ykoIAAFS8AgAAFauCAAA0xgIAAMSmg Date: Mon, 10 Jun 2024 21:28:04 +0000 Message-ID: References: <20240503164239.GB901876@ziepe.ca> <20240610161826.GA4966@unreal> <20240610172501.GJ791043@ziepe.ca> In-Reply-To: <20240610172501.GJ791043@ziepe.ca> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-publictraffictype: Email x-ms-traffictypediagnostic: PH7PR11MB7004:EE_|MW3PR11MB4569:EE_ x-ms-office365-filtering-correlation-id: 37589a98-37ed-4ea4-5c50-08dc89943694 x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0;ARA:13230031|366007|1800799015|7416005|376005|38070700009; x-microsoft-antispam-message-info: =?iso-8859-1?Q?eI1q3pcT7kUZJHjJhmmYCldx30UZuwN2ap1MYL260M/76wUwvTFvvgIUrl?= =?iso-8859-1?Q?Ck/dGCdUutjIbPxkNiN7AJcTu9Sjp5xW4sOPG3SLvU4JE570alWaBa9dQG?= =?iso-8859-1?Q?og64/k5Lil7XsES3sDQCjwVx2KCX/Fs0QlYHkqVeizvm6n+9OP6m/5PHyI?= =?iso-8859-1?Q?tZhWeDCLAXL56BbjO8874YhxiGO8AyTB0iZmX0oyQgZDica80XlVESyeyk?= =?iso-8859-1?Q?lS2HYDZ3jJK/S7iQF97OM/+mH5m88uPoMTxV4gvhcxIgrcXoTP2a+w5uFf?= =?iso-8859-1?Q?j6/lOMD0vv6HFSyZ+89v5CfJw2CJTAE1vMOQgL+j1jNSzPDivQxxMl5sb3?= =?iso-8859-1?Q?RgOWDgfmTJnTvWSydRD0sRH7e0H9CcAThIKYw/Ixf5XsoMzw7Nu1O/UtmI?= =?iso-8859-1?Q?yL/IWhM3t+5ymt2+jNWuRA0+hvOnfX0VTbrfSTECu3y5dDtvVhfTbwpOo9?= =?iso-8859-1?Q?YHD+zY8fjJV4YLYvQmbBFpDCkA4SaTFeoazSAYv3OSxjI0Q5mp4NCmpUmn?= =?iso-8859-1?Q?lciBYZ+5RrdJavnsLFgIK2roPdTp7gPOs7IXTj8xj68zHxTCU2ydK0EvJq?= =?iso-8859-1?Q?WKgd4XXm3PqFjOYL6tw9wg9n7oyz7KGKoKjJih5HcoSQlEmS0wsfoKzapL?= =?iso-8859-1?Q?n/QzLaM4oLoAGWJcOXTzyqllDDbDpymBLHbrBt87c4Jc/PXenwFl7g3DwV?= =?iso-8859-1?Q?aqXNOpM6FuDPTvvgbHT9f9fIXN+REnB+qSjKbZteFPYfKqiODmdFMadsA+?= =?iso-8859-1?Q?9SXMTRn5iXPUnl8lSPQaWYgNwQBL7nbaCMQoAbNKUMJL7sjaAHqj6bSco6?= =?iso-8859-1?Q?EbiOhDfZnp7jTWExrkfIHjfwOBCdCJDOmx1kpm5Aod/vDeHNPbN3rACpIA?= =?iso-8859-1?Q?w3OezTU/H1XqBgfi1YbAnliGjwkamTcq79SWvTTMCHWMbNe15BnLz8YLhv?= =?iso-8859-1?Q?muicqQkpODJfUs8Lzkl8d+UDqIygAHVFPAT4xF+iFUiixbJsuF++h0fw8T?= =?iso-8859-1?Q?WdLI8jAnMs6icoQRkPBy1jFr1VMGvqAyF6T80dn9INLWo/ilMMzk6o48uP?= =?iso-8859-1?Q?pALbSc2qvzx1BXer0TEFnXY3+JLb69TAZgmzBIa/PaI/mROnqpDNUATIvO?= =?iso-8859-1?Q?ioW1gyWk/EMGI/Ggwu4tIj8ELJKI5zclPiczn06ovmy7WQC1+iMEdAleYQ?= =?iso-8859-1?Q?tSTbABFXuXWyrq70jXXug14vhjvObQIt/WV+U3fXEOVOGDx0fUDniKN8D6?= =?iso-8859-1?Q?+wn7pFpdmUW1Etq6MfaUnkr1Mtf292dVIRY7mRd46ytYTkfjFwH93b8pEA?= =?iso-8859-1?Q?eXZTO/hAlY2ELaLOdKqbKBAkYjunRXoIgQenyD2SMR/mhfVHFOqWuIOgzM?= =?iso-8859-1?Q?banKjHG+d9pR69qxU9SXvAjXRYzd42QNzec7khZDdVkB98IKsf4kA=3D?= x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH7PR11MB7004.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(366007)(1800799015)(7416005)(376005)(38070700009);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?iso-8859-1?Q?PjcdyxOnSaSGrq+tbgi8+jJ1RCh76Ixo4uQSOUIgXwEcfdhYH60dvSSSCg?= =?iso-8859-1?Q?uAmayoww6Td8Lm5exyoVwK3Ruimaran6JFjYjUn7oKLfusDHLCEwGoBK8s?= =?iso-8859-1?Q?PNRuV/1HgK4icXJF0CrEKu0yWYya73Ys0uOWSdkxSekmRF0t9Ja7XUKoDd?= =?iso-8859-1?Q?d+g/EDvSFLgHnCWhVtt0AWn1LfnA4nW1vSUGbGqXeScuhEYdD+fWyulsp8?= =?iso-8859-1?Q?ETvgIz4cIqpQUk3+yIPSjsiGS9KnWnmtbU7clz6s8ZvSfpLoMARUjFR3lC?= =?iso-8859-1?Q?SBUvA55voMve+iVIxZLj8hNXdPL/sqALb6b+tCq973wUvlKtVG0MMJR6NF?= =?iso-8859-1?Q?4pdrmXirELGkVnFluKfQ6DiDwo6urHzMxnqLaDJSfPGuqZMHGzYKVipLZS?= =?iso-8859-1?Q?nrVgJ+wV4fMXfzJqnpzjRpahWwLV2lVNk3rUnGnu2yvBWbdPe1NwJJTgET?= =?iso-8859-1?Q?lBmEHw2Zfui34kwQ/goQm4AxXDS4vto9g/SJubDAF5sd/o+9vGtERrWJ3Y?= =?iso-8859-1?Q?vM74li+app7/EV5MzeRZakSBqWDv4nXAAoZbSUm4PIONcQ8BowjC7VPXim?= =?iso-8859-1?Q?YB+1svn3+rbS45fWiKRTOq2LHLnukAprFLdBUHPW4J4UBpQVJEsg7i7LL7?= =?iso-8859-1?Q?rJa1YdFNkfpxK9dFNQh0nwpY4GZF+74Ves4LebKXYo8lmXOR4oIvhU4WUh?= =?iso-8859-1?Q?zVk+VZWGgVbIvWhuIHaFaD/f/L41JO5IiEnP+aSstvTUXaEtFqgriHyntP?= =?iso-8859-1?Q?gRGT2EW/2iWQsfWxlbVCld6+O24XTAr0ZGeuHYehzXkbmgGSzCeFJGLlKT?= =?iso-8859-1?Q?LnI4lY+hnYjA02clZmp/zTgYxMY1Fhbj9teM+c7xCq4e9hx0OxLdo0tX/e?= =?iso-8859-1?Q?4GbGJy0lSaRCOdgS9sgXBiawXX+tev5wPpQnGUbpkO/7cwiYQkSzdYgxWx?= =?iso-8859-1?Q?HuwSlxostrJDpMdBY3qowWlinlI2Fo40pM8eJeHnsBTgFSfEmjcap2cbxa?= =?iso-8859-1?Q?e4yEOVrFmebPoBhLL0VkCFySREI5U8gz/IMAhThgwUgY1/GnJz8B9QtrGP?= =?iso-8859-1?Q?d4Vu7DW0q/AGUdhBsB7HBkChBwL0AcTMcWHZCjprWuF8tCoEWjcI+OwbDR?= =?iso-8859-1?Q?3gDGlWgSlOvrdOXnK/J8/jk5fPkTQEyx+1LqygJgjn6e6PWTIdyMGRCMbx?= =?iso-8859-1?Q?oNdDMpjNcQlzciIZmSeLxMe02ofb0wrUwSh00DYrrwc+iC768FlzGS+z/M?= =?iso-8859-1?Q?aMiok0HMjWQHrm4gX8niIjw+G0g+GGqL6PqUycIutzGCa7G9Pdy+Psbox3?= =?iso-8859-1?Q?0w81vALl/0OP4H2MnGqDE8VhVpS/B07r93nzQ5n7ki8ITkANpUimJwwL6Q?= =?iso-8859-1?Q?B7fRkam9NVtLRhZqZ4gsGko2neVZ6Jk03tc1xpCQ0Mk4uE+un8uGZA/ae5?= =?iso-8859-1?Q?w9Uvzn+pxRM2B7uRyzgjCS81WODkbSnnNb8ijGcEmK6oL/TLVi4XWgqsJe?= =?iso-8859-1?Q?NCEPFcrFV6JAjBDKh752M1yAUYW+4uIXpzTdKAcJkZAVPaeeZpZDP4Tkln?= =?iso-8859-1?Q?Nqcx+KGCqwEmjSvP7zQvTZXsfemM3QvsOruR/43e0SXJP8OwTdBYVEJia4?= =?iso-8859-1?Q?I1psmDW/GdYNw=3D?= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: PH7PR11MB7004.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 37589a98-37ed-4ea4-5c50-08dc89943694 X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Jun 2024 21:28:04.3358 (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: rQ8N4799OngImkQI47K7erSnlVSMJVBu4avWVxd5FwDOMguigj2T6uY1xo4cGeVG11r09CRETuGb9fisGr0sYg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW3PR11MB4569 X-OriginatorOrg: intel.com X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 3FC76C0003 X-Stat-Signature: z7nm8nmcwa49cyj81ddcmjd1c1e7h18a X-HE-Tag: 1718054892-73979 X-HE-Meta: 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 mwLavxPA 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 7nsRWrdO L4JCYx8tNag6UY/NqMYr9n20M45ZIijY0uKOs/+9Tm1l4Q8GXWMOXcjVyWiNkm++nSPI2aNpD88yWDoYvBA22njpx57pGo9reiuOSIJjzr85u6L2HJwyzE1gQ65FxSDjvSxe+wXLookVvdn7ruU4rKi5ITy4XEsjDyUTcFNdJbUYgDYGgIZcV8DXDacR0YYeZpemZYxu5xSlpgZkG69OYHCacnI2UhCZfFkTEm2d9WlY4BsxIc8YNcL4sboooA19VtBLu7+LhGG8Ios0sSZwwGikau44b+LD 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: Hi Jason, Leon, I was able to fix the issue from my side. Things work fine now. I got two q= uestions though: 1) The value returned from dma_link_range function is not contiguous, see b= elow print. The "linked pa" is the function return. I think dma_map_sgtable API would return some contiguous dma address. Is th= e dma-map_sgtable api is more efficient regarding the iommu page table? i.e= ., try to use bigger page size, such as use 2M page size when it is possibl= e. With your new API, does it also have such consideration? I vaguely remem= bered Jason mentioned such thing, but my print below doesn't look like so. = Maybe I need to test bigger range (only 16 pages range in the test of below= printing). Comment? [17584.665126] drm_svm_hmmptr_map_dma_pages iova.dma_addr =3D 0x0, linked p= a =3D 18ef3f000 [17584.665146] drm_svm_hmmptr_map_dma_pages iova.dma_addr =3D 0x0, linked p= a =3D 190d00000 [17584.665150] drm_svm_hmmptr_map_dma_pages iova.dma_addr =3D 0x0, linked p= a =3D 190024000 [17584.665153] drm_svm_hmmptr_map_dma_pages iova.dma_addr =3D 0x0, linked p= a =3D 178e89000 2) in the comment of dma_link_range function, it is said: " @dma_offset nee= ds to be advanced by the caller with the size of previous page that was lin= ked + DMA address returned for the previous page". Is this description correct? I don't understand the part "+ DMA address ret= urned for the previous page ". In my codes, let's say I call this function to link 10 pages, the first dma= _offset is 0, second is 4k, third 8k. This worked for me. I didn't add the = previously returned dma address. Maybe I need more test. But any comment? Thanks, Oak > -----Original Message----- > From: Jason Gunthorpe > Sent: Monday, June 10, 2024 1:25 PM > To: Zeng, Oak > Cc: Leon Romanovsky ; Christoph Hellwig ; > Robin Murphy ; Marek Szyprowski > ; Joerg Roedel ; Will > Deacon ; Chaitanya Kulkarni ; > Brost, Matthew ; Hellstrom, Thomas > ; Jonathan Corbet ; Jens > Axboe ; Keith Busch ; Sagi > Grimberg ; Yishai Hadas ; > Shameer Kolothum ; Tian, Kevin > ; Alex Williamson ; > J=E9r=F4me Glisse ; Andrew Morton foundation.org>; linux-doc@vger.kernel.org; linux-kernel@vger.kernel.org; > linux-block@vger.kernel.org; linux-rdma@vger.kernel.org; > iommu@lists.linux.dev; linux-nvme@lists.infradead.org; > kvm@vger.kernel.org; linux-mm@kvack.org; Bart Van Assche > ; Damien Le Moal > ; Amir Goldstein > ; josef@toxicpanda.com; Martin K. Petersen > ; daniel@iogearbox.net; Williams, Dan J > ; jack@suse.com; Zhu Yanjun > ; Bommu, Krishnaiah > ; Ghimiray, Himal Prasad > > Subject: Re: [RFC RESEND 00/16] Split IOMMU DMA mapping operation to > two steps >=20 > On Mon, Jun 10, 2024 at 04:40:19PM +0000, Zeng, Oak wrote: > > Thanks Leon and Yanjun for the reply! > > > > Based on the reply, we will continue use the current version for > > test (as it is tested for vfio and rdma). We will switch to v1 once > > it is fully tested/reviewed. >=20 > I'm glad you are finding it useful, one of my interests with this work > is to improve all the HMM users. >=20 > Jason