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=-8.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 962E5C433E0 for ; Fri, 5 Mar 2021 04:14:46 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D375A64FF0 for ; Fri, 5 Mar 2021 04:14:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D375A64FF0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=wdc.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:Message-ID:Date:Subject:CC: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:List-Owner; bh=+c2jc06L8NUcXW7LTPrM++5xTHfPzt0i5KsKzh8ZwL8=; b=lRWTwa80bqw+E2mUJytOW5iX0 PiVwWUrOyX8joOpYCD/PO3KDLxIbIBCFF4iJ3TlQ3wgE6R2r1vWY7sG6SalkaG2wszsw6kj24BuHk ow73i0WAv4GZB0fISxWJRlMs46zuFriIDLTfKaOPwnhDej7UB7Ug80xxtQvXOPmqSPeEBHelCFlaA 26bm3EVCJxlaFT32RA9KEhp7PbTD0AUBfkoL5jCB+S7nrSmtnE+SZdCqOcPlO4zckM64l02qgTeHX xaBowBhBJ04MHjsKc2zSouu/ex1X2COV0oQ+J3Gfs+70f5hPJyIW7i7Bjn1KCcaizS15WuZVkBlcW YVUYl89LA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lI1r8-00CJvO-74; Fri, 05 Mar 2021 04:14:26 +0000 Received: from esa3.hgst.iphmx.com ([216.71.153.141]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lI1qz-00CJrM-US for linux-nvme@lists.infradead.org; Fri, 05 Mar 2021 04:14:21 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1614917657; x=1646453657; h=from:to:cc:subject:date:message-id:references: content-transfer-encoding:mime-version; bh=lngAJebvLNIKPqe21Pd/Zt4nK4VJXY566p8PQgl/fZ4=; b=lduZga4cb+ZGnpWxe3sAUGwFYNf7hrP2nwe+wX7xKZNbkgT9BGb+yS14 tHHIdaV1jsB0FQFyNBUKLlBb/uE4hi8nYJ1zzdFeW61HfiEaRa6JO84aZ Sk8/xu4B3EkJDvhVKn1gnbE+jNxGviNAwG0/gPxigwyVbVvFF8OkVXn4k zrjt1+3dWw3kirJvZgNGMH5W/dpicSqOoqTocI21i5l5neFjDjAq96h4b NnXuz8GjJ3yzhcI9gK/K0cg3Ek0TFbXnQOAKDikhFh0VMC6ro+xQKe5jC HGI1MInR9nnQ3SxQSYpD9GulQdiDATJByFDtY1fZX8Rh8u25CDtXm4T9D A==; IronPort-SDR: 2y9CE7oPO5CmkVI1lNg/mH48zHaYKhMa7Q7zCYGb9ZnmNEzj86mTQtD6TzrdM+Su7iZIKcJ6Tj o8zLxIyMqaPjgoZ0jPffVNuvRs7u3dQgPCgiJA3pIEhVPsM/y6ditjAsnF0+u81oCFi6Ml/gFh yslWQqmEBkohjDzwVt3YOu3Z3kluJ/FtT5M1a+WLb8E3IPbpDqavvX6OJeOHYbRqEkQGEwi7iE FUBtaYH9E2/TyHYudCqm5+kZK2sf7iHBUTADYjGiGajD1oxyOBipCiqFX0XZkS1lPGmXHE9o3q xtM= X-IronPort-AV: E=Sophos;i="5.81,224,1610380800"; d="scan'208";a="165897514" Received: from mail-mw2nam10lp2109.outbound.protection.outlook.com (HELO NAM10-MW2-obe.outbound.protection.outlook.com) ([104.47.55.109]) by ob1.hgst.iphmx.com with ESMTP; 05 Mar 2021 12:14:12 +0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=MRxgLLxQUlW6gt6mrOPEbgxM7KxfiHZUzgXFus88O++CP+XPYkU4PFy0wAC/lT/I3ZHlrPtRSwOHfjJ97fFFjshqQs5BAZ2ZvdrYrnBaXcdispInjNq31o9U3FddELjn4dHRNQC6Y4m0+s19ThCivqm2WH0l1PyLUkOM2l69NwMU0/uWf2QsCnDaz+oa46z6OF9ATI4nZrQeitALMy6XKwL/Xo7VPHhb0CkJPHXK0b9nAZxbW/tOV/0VnKPzYTNl7Fym/hLIRc1WnPWrtlw7XzQuVkxzJFEhv14IJoIWF9VsfBChe7CSzLQiU88WH9A1iJGrMjhbJmEcYPzRUqYvKQ== 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=RScwyRXRLizNHR00xBc7A82nfvR9o/ArcmXzNbmpy9k=; b=HqeQB7HYaGog+024yagdfLeqZI4KhfTo1rZork29Cdn6C2KnzE0EORtU6fXU1N3MqneFgA7/d6ihmVj+lo1T0QslqoX14VBwlepvLbt1OUJne4TDowHLaMFzyzqen/5m4UZa/v2TwjaGHUb4qKZTqB8ihViPYYjaiem14d9oL/6/tviW2y1lT+c9HdVxTB+CVboy1RfGJct8fr8MOnkq0v5QjQCgxotIRvdd0PQtwcxwfYpGvAIt2LeiFM4Yrc4w/lYvZH7PCCbbA1gC2eUWVbJXoSPhuOlq14DKeIBFjDelBeRWmlEO/cRB/zDYFPiUEtXijq3Zm8PfUDC0CnVEnA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=wdc.com; dmarc=pass action=none header.from=wdc.com; dkim=pass header.d=wdc.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sharedspace.onmicrosoft.com; s=selector2-sharedspace-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=RScwyRXRLizNHR00xBc7A82nfvR9o/ArcmXzNbmpy9k=; b=aNsfzNngWZTE8/+yz8J44gBa8a3nsJVWsZNP2geXV9HhOFyERmFMBCyciDhNvGNMw4zaDEFOOnD2J28IRMFuYZ9dfv0J8p/kTYloRvfz9wjPlJsAiFoBDGK4VfIPWJDIXBCJ+dn4iiEmtxrPBqz0gEhbE1tRsdwE97O4BHs+aZc= Received: from BYAPR04MB4965.namprd04.prod.outlook.com (2603:10b6:a03:4d::25) by BYAPR04MB3861.namprd04.prod.outlook.com (2603:10b6:a02:ac::33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3890.20; Fri, 5 Mar 2021 04:14:11 +0000 Received: from BYAPR04MB4965.namprd04.prod.outlook.com ([fe80::c897:a1f8:197a:706b]) by BYAPR04MB4965.namprd04.prod.outlook.com ([fe80::c897:a1f8:197a:706b%5]) with mapi id 15.20.3890.034; Fri, 5 Mar 2021 04:14:11 +0000 From: Chaitanya Kulkarni To: Kanchan Joshi CC: Kanchan Joshi , "axboe@kernel.dk" , "hch@lst.de" , "kbusch@kernel.org" , "io-uring@vger.kernel.org" , "linux-nvme@lists.infradead.org" , "anuj20.g@samsung.com" , "javier.gonz@samsung.com" Subject: Re: [RFC 2/3] nvme: passthrough helper with callback Thread-Topic: [RFC 2/3] nvme: passthrough helper with callback Thread-Index: AQHXD/4EOPP4CH9isESsU82uWJlGPw== Date: Fri, 5 Mar 2021 04:14:11 +0000 Message-ID: References: <20210302160734.99610-1-joshi.k@samsung.com> <20210302160734.99610-3-joshi.k@samsung.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: gmail.com; dkim=none (message not signed) header.d=none;gmail.com; dmarc=none action=none header.from=wdc.com; x-originating-ip: [199.255.45.62] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 8291c884-5e99-4059-43cc-08d8df8d2152 x-ms-traffictypediagnostic: BYAPR04MB3861: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:6430; x-ms-exchange-senderadcheck: 1 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:BYAPR04MB4965.namprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(396003)(366004)(39860400002)(376002)(136003)(346002)(2906002)(478600001)(83380400001)(316002)(33656002)(86362001)(54906003)(26005)(71200400001)(6916009)(4326008)(52536014)(7696005)(66946007)(55016002)(6506007)(66556008)(66476007)(5660300002)(8936002)(186003)(76116006)(64756008)(66446008)(91956017)(53546011)(8676002)(9686003); DIR:OUT; SFP:1102; x-ms-exchange-antispam-messagedata: =?us-ascii?Q?HAZVDIZRKgKpgWZRCJ3O7G0hyuu1G3DG9CDsj6Omg7MtH683zBikl2vTntUf?= =?us-ascii?Q?MoH9HDGeAAmYGzrQ62mDIE+4LXz0JvHb03m2usoUG0I5UJ41cE2fATQXS3YI?= =?us-ascii?Q?6qWmRyfOnECgmaT7ajIhYp8viDBzoZn4orx/elYq74RGITsPAhWaiCkDbhjE?= =?us-ascii?Q?By0uomVOboIv2AA8RYDTmUQN6FgFgSTYHyqk1N1Gs+PxQxRdJ0MtZJj0Pjh4?= =?us-ascii?Q?uLtiZsNQFHbbmMyOklcmir/x8j3M9wLSz2S8mKHm1jlVjdOSh5vYynplvJY3?= =?us-ascii?Q?ykmh7MJvXC1U6U1E3bwdIIe6XQIdID+JUTdrXLB8SOXjD+zZIotl6/eKEDEj?= =?us-ascii?Q?S0OtH8X3i7XaoZ2qYrX91eK0ZiSzqcwjOJ3g/v3cUJQWMigElQMM+P9Dsblo?= =?us-ascii?Q?ogrbI0b6rFvRetaqKSUZM+yhnSHlCeM2QlZOpRpCWd4ZO/k5FFQBCzNkQ2vm?= =?us-ascii?Q?cQ/eXaeicWRtFDbZ7XPdJP5FjEFgl7aEkLzSA162wkikzmTt0OoGHxKzF6cB?= =?us-ascii?Q?Q6Q97gyBf1Qxzbf7TqNJ9opmqFZYlK8vbWcbrMc37jvD/EMq938/zkcrze6I?= =?us-ascii?Q?MEpt1t4UnGDd1nwRCxa/84ypseJmTLQuGMSyjYV/DKiKmJHWHHFAl+X/f9N/?= =?us-ascii?Q?jLnkYzsGZzuCFSarV1i5g7yD5fRomms2q6NXLtTaF2bteJGXQenTyMIENl/P?= =?us-ascii?Q?NkpyBhu3pXlu+S8qjYGk7kLdZjqxUis1FOTIRnN+CcZuUrvr0oQV/iv0jQTN?= =?us-ascii?Q?QbSarEEvWPd6AthjAPnlVAo1S9Z4ICjO7PCklYNFq6gGJJcn3BfFpqcU/iCQ?= =?us-ascii?Q?m2PZZRzt/czdFDxEIyo85mVHWAy03/JtMKYJirXBjHLTeClnj6KVKl8G4M72?= =?us-ascii?Q?cCXOfaXvHwWeHVDnV4d6qrr+7pmjubFkUhuPSuiuH/9RpByPAi0Va4Ox60PP?= =?us-ascii?Q?hsxugUdMLRhyLr9Yz2mKSPoStEPug25Dh7Cm/jNbD8Cn0U7tSFU8pD6mmpqf?= =?us-ascii?Q?TpNKpRLXq4NzMEgb8ssYU+MNJ2CziOEj6y9/tLXKm4LFxiwg0wwBCY9aYq9/?= =?us-ascii?Q?EQs3bFg4oNZqMDxXX1O8O+QQdeTa45GK4ldOnsFPpkOoTQmhxitdcYdN9cWw?= =?us-ascii?Q?N4pFIQQMSS/Qqg8WMnaqV/zXdlAOU7ZzR8rsIhIlzTHnpH/sVVGj+32A3esa?= =?us-ascii?Q?UkNbgX2DyBrZbPpg6fkvn64fm0KDItGHFWjfTVHs45CmEwTUIDJCzQVQiWyn?= =?us-ascii?Q?6LpIM+oPMTuB2O6ZDCwUuNFLNmW9GLWvY/SxP7sK9T2e6wkmA5KRWQ8wn1v5?= =?us-ascii?Q?l6WYDNbvJP3IyiAEAcZSXK/q?= x-ms-exchange-transport-forked: True MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BYAPR04MB4965.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 8291c884-5e99-4059-43cc-08d8df8d2152 X-MS-Exchange-CrossTenant-originalarrivaltime: 05 Mar 2021 04:14:11.3628 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: iqd83NXh2H1xTkBkDLL7okq5jJv9fp7O9+6nYeaGiFIt87spHsiP4yeH1NRsFa0BS/u6u3LK/dK9IJhi4OqOqgBP3aRca0ZuVh/mKkvaTmk= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB3861 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210305_041418_355782_F6F2C227 X-CRM114-Status: UNSURE ( 9.87 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 3/4/21 03:14, Kanchan Joshi wrote: > On Wed, Mar 3, 2021 at 8:52 PM Chaitanya Kulkarni > wrote: >> On 3/2/21 23:22, Kanchan Joshi wrote: >>> -void nvme_execute_passthru_rq(struct request *rq) >>> +void nvme_execute_passthru_rq_common(struct request *rq, >>> + rq_end_io_fn *done) >>> { >>> struct nvme_command *cmd = nvme_req(rq)->cmd; >>> struct nvme_ctrl *ctrl = nvme_req(rq)->ctrl; >>> @@ -1135,9 +1136,17 @@ void nvme_execute_passthru_rq(struct request *rq) >>> u32 effects; >>> >>> effects = nvme_passthru_start(ctrl, ns, cmd->common.opcode); >>> - blk_execute_rq(disk, rq, 0); >>> + if (!done) >>> + blk_execute_rq(disk, rq, 0); >>> + else >>> + blk_execute_rq_nowait(disk, rq, 0, done); >>> nvme_passthru_end(ctrl, effects); >> This needs a detailed explanation in order to prove the correctness. > Do you see something wrong here? > blk_execute_rq() employs the same helper (i.e. nowait one) and uses > additional completion-variable to make it sync. > There is no gurantee that command will finish between call to blk_execute_rq_nowait() and nvme_passthru_end() is there ? _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme