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Thu, 14 Mar 2019 09:08:58 +0000 From: Shahaf Shuler To: Yongseok Koh CC: "dev@dpdk.org" , "stable@dpdk.org" Thread-Topic: [PATCH] net/mlx5: fix packet inline on Tx queue wraparound Thread-Index: AQHU2ES8n5L9A+A3NkCjvCi4rZBsEqYK2nEQ Date: Thu, 14 Mar 2019 09:08:57 +0000 Message-ID: References: <20190310081410.94830-1-shahafs@mellanox.com> <44AC735D-DF85-4883-A612-979D6D6DD59C@mellanox.com> In-Reply-To: <44AC735D-DF85-4883-A612-979D6D6DD59C@mellanox.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=shahafs@mellanox.com; x-originating-ip: [31.154.10.105] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 1a652a2a-9b95-47f3-8a01-08d6a85cb11b x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600127)(711020)(4605104)(4618075)(2017052603328)(7153060)(7193020); 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Mellanox.com X-MS-Exchange-CrossTenant-Network-Message-Id: 1a652a2a-9b95-47f3-8a01-08d6a85cb11b X-MS-Exchange-CrossTenant-originalarrivaltime: 14 Mar 2019 09:08:57.8371 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a652971c-7d2e-4d9b-a6a4-d149256f461b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR0502MB4034 Subject: Re: [dpdk-dev] [PATCH] net/mlx5: fix packet inline on Tx queue wraparound X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Mar 2019 09:08:59 -0000 Monday, March 11, 2019 9:58 PM, Yongseok Koh: > Subject: Re: [PATCH] net/mlx5: fix packet inline on Tx queue wraparound >=20 >=20 > > On Mar 10, 2019, at 12:14 AM, Shahaf Shuler > wrote: > > > > Inlining a packet to WQE that cross the WQ wraparound, i.e. the WQE > > starts on the end of the ring and ends on the beginning, is not > > supported and blocked by the data path logic. > > > > However, in case of TSO, an extra inline header is required before > > inlining. This inline header is not taken into account when checking > > if there is enough room left for the required inline size. > > On some corner cases were > > (ring_tailroom - inline header) < inline size < ring_tailroom , this > > can lead to WQE being written outsize of the ring buffer. > > > > Fixing it by always assuming the worse case that inline of packet will > > require the inline header. > > > > Fixes: 3f13f8c23a7c ("net/mlx5: support hardware TSO") > > Cc: stable@dpdk.org > > > > Signed-off-by: Shahaf Shuler > > --- >=20 > Acked-by: Yongseok Koh Applied to next-net-mlx, thanks.=20 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 4B144A0096 for ; Thu, 14 Mar 2019 10:09:01 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 94BA63572; Thu, 14 Mar 2019 10:09:00 +0100 (CET) Received: from EUR04-HE1-obe.outbound.protection.outlook.com (mail-eopbgr70055.outbound.protection.outlook.com [40.107.7.55]) by dpdk.org (Postfix) with ESMTP id 53EBC324D; 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charset="UTF-8" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Mellanox.com X-MS-Exchange-CrossTenant-Network-Message-Id: 1a652a2a-9b95-47f3-8a01-08d6a85cb11b X-MS-Exchange-CrossTenant-originalarrivaltime: 14 Mar 2019 09:08:57.8371 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a652971c-7d2e-4d9b-a6a4-d149256f461b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR0502MB4034 Subject: Re: [dpdk-dev] [PATCH] net/mlx5: fix packet inline on Tx queue wraparound X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Message-ID: <20190314090857.H_xC4xrjdaitOVkD37l8EDQOS46hN_2t7PDrsrxOLlM@z> Monday, March 11, 2019 9:58 PM, Yongseok Koh: > Subject: Re: [PATCH] net/mlx5: fix packet inline on Tx queue wraparound >=20 >=20 > > On Mar 10, 2019, at 12:14 AM, Shahaf Shuler > wrote: > > > > Inlining a packet to WQE that cross the WQ wraparound, i.e. the WQE > > starts on the end of the ring and ends on the beginning, is not > > supported and blocked by the data path logic. > > > > However, in case of TSO, an extra inline header is required before > > inlining. This inline header is not taken into account when checking > > if there is enough room left for the required inline size. > > On some corner cases were > > (ring_tailroom - inline header) < inline size < ring_tailroom , this > > can lead to WQE being written outsize of the ring buffer. > > > > Fixing it by always assuming the worse case that inline of packet will > > require the inline header. > > > > Fixes: 3f13f8c23a7c ("net/mlx5: support hardware TSO") > > Cc: stable@dpdk.org > > > > Signed-off-by: Shahaf Shuler > > --- >=20 > Acked-by: Yongseok Koh Applied to next-net-mlx, thanks.=20