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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: CH0PR12MB5041.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 36002467-7eef-4073-4bfc-08d915555f43 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 May 2021 14:51:06.2692 (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: GnkBrQo4Omt1jHKW3dVCzhq8I1/O1e1URl5YzurO0Mwmb+McoroZyrk7t3aVEPwTv0gp9okElT5WOVCM2hX0nA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR12MB5369 Subject: Re: [dpdk-stable] [PATCH] net/mlx5: fix loopback for DV queue 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 Thomas, > -----Original Message----- > From: Thomas Monjalon > Sent: Wednesday, May 12, 2021 10:49 PM > To: Bing Zhao > Cc: Slava Ovsiienko ; Matan Azrad > ; dev@dpdk.org; Ori Kam ; Raslan > Darawsheh ; stable@dpdk.org > Subject: Re: [PATCH] net/mlx5: fix loopback for DV queue >=20 > External email: Use caution opening links or attachments >=20 >=20 > 12/05/2021 16:36, Bing Zhao: > > When switching to the Devx interface, the kernel driver behavior > may >=20 > What do you mean by "switching"? I mean when changing the Rxq from Verbs API to Devx API. >=20 > > be different from using Verbs. The Tx loopback cannot work > properly > > even if the Tx and Rx queues are configured with loopback > attribute. > > To support self loopback for Tx, a Verbs dummy queue pair needs to > be > > created to trigger the kernel to enable the loopback. > > > > This is only required when TIR is created for Rx and loopback is > > needed. Only CQ and QP are needed for this case, no WQ(RQ) needs > to be > > created. > > > > This requirement comes from bugzilla 312, more details can refer > to: >=20 > It is not 312. >=20 > > https://bugs.dpdk.org/show_bug.cgi?id=3D645 I will change it. >=20 > You can remove above lines, because the tag below is enough. > > > > Bugzilla ID: 645 > > > > Fixes: 6deb19e1b2d2 ("net/mlx5: separate Rx queue object > creations") > > Cc: stable@dpdk.org > > > > Signed-off-by: Bing Zhao > > Acked-by: Viacheslav Ovsiienko >=20 >=20 Thanks