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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MN0PR12MB6056.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6d2a3447-ceec-417a-c0a8-08dca6fa709b X-MS-Exchange-CrossTenant-originalarrivaltime: 18 Jul 2024 07:22:54.0493 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ID/RRL9Iu2PKjnKfLJAIIHGYqPmSkQYWrzQ5rl7Wz9w2xxTvgx5+rGgPl6IzbFdQZEgcp4kwyW4Z8qJPP2VngA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7897 X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Hi,=0A= =0A= From: Jiawei(Jonny) Wang =0A= Sent: Friday, July 5, 2024 4:05 PM=0A= To: Bing Zhao; Slava Ovsiienko; Dariusz Sosnowski; Ori Kam; Suanming Mou; M= atan Azrad; Alexander Kozyrev=0A= Cc: dev@dpdk.org; Raslan Darawsheh; stable@dpdk.org=0A= Subject: [PATCH] net/mlx5: fix data access race condition for shared Rx que= ue=0A= =0A= The rxq_data resources were shared for shared Rx queue with the same=0A= group and queue ID.=0A= The cq_ci:24 of rxq_data was unalignment with other fields in the one=0A= 32-bit data, like the dynf_meta and delay_drop.=0A= =0A= 32bit: xxxx xxxI IIII IIII IIII IIII IIII IIIx=0A= ^ .... .... .... .... ...^=0A= | cq_ci |=0A= =0A= The issue is that while the control thread updates the dynf_meta:1 or=0A= delay_drop:1 value during port start, another data thread updates the=0A= cq_ci at the same time, it causes the bytes race condition with=0A= different thread, and cq_ci value may be overwritten and updated the=0A= abnormal value into HW CQ DB.=0A= =0A= This patch separates the cq_ci from the configuration data spaces, and=0A= adds checking for delay_drop and dynf_meta if shared Rx queue if=0A= started.=0A= =0A= Fixes: 02a6195cbe ("net/mlx5: support enhanced CQE compression in Rx burst"= )=0A= Cc: stable@dpdk.org=0A= =0A= Signed-off-by: Jiawei Wang =0A= Acked-by: Bing Zhao =0A= Acked-by: Viacheslav Ovsiienko =0A= =0A= Patch applied to next-net-mlx,=0A= =0A= Kindest regards,=0A= Raslan Darawsheh=0A= =0A=