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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM4PR12MB5312.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: d571e964-d39f-4de0-6e65-08d9a426d600 X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Nov 2021 08:48:15.4077 (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: 56vlmDfb2AlcXokDrX1plS3Rd5rwzAYay2TK3jiuorocDMy1sV69EZZxUH/xK/XMnhpBvKejQ+Q8ORrQkAcH/A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5359 Subject: Re: [dpdk-stable] [PATCH] net/mlx5: fix the RETA update without stopping device 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 Sender: "stable" Hi, > -----Original Message----- > From: Bing Zhao > Sent: Friday, November 5, 2021 8:11 AM > To: Slava Ovsiienko ; Matan Azrad > > Cc: dev@dpdk.org; Raslan Darawsheh ; > stable@dpdk.org; Ori Kam ; NBU-Contact-N?lio > Laranjeiro > Subject: [PATCH] net/mlx5: fix the RETA update without stopping device >=20 > The global redirection table is used to create the default flow > rules for the ingress traffic with the lowest priority. It is also > used to create the default RSS rule in the destination table when > there is a tunnel offload. >=20 > To update the RETA in-flight, there is no restriction in the ethdev > API. In the previous implementation of mlx5, a port restart was > needed to make the new configuration take effect. >=20 > The restart is heavy, e.g., all the queues will be released and > reallocated, users' rules will be flushed. Since the restart is > internal, there is a risk to crash the application when some change > in the ethdev is introduced but no workaround is done in mlx5 PMD. >=20 > The users' rules, including the default miss rule for tunnul > offload, should not be impacted by the RETA update. It is improper > to flush all rules when updating RETA. >=20 > With this patch, only the default rules will be flushed and > re-created with the new table configuration. >=20 > Fixes: 3f2fe392bd49 ("net/mlx5: fix crash during RETA update") > Cc: nelio.laranjeiro@6wind.com > Cc: stable@dpdk.org >=20 > Signed-off-by: Bing Zhao > Acked-by: Viacheslav Ovsiienko Patch applied to next-net-mlx, Kindest regards, Raslan Darawsheh