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charset="us-ascii" Content-ID: <7896F23D013954439ED8E6611E7D572D@namprd10.prod.outlook.com> Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BN0PR10MB5128.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0fdb4e77-1098-4c4a-82b1-08db620ae439 X-MS-Exchange-CrossTenant-originalarrivaltime: 31 May 2023 19:11:52.1154 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: JyK504SGylLqMWFjAWi+w1IZxp4qEO1CZlTfnrqg6OTagxL/VwBCIKyEmS+kt4w9m+iP4XA4HCaGLZTG1KCcfA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR10MB7180 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-05-31_14,2023-05-31_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 phishscore=0 mlxscore=0 malwarescore=0 suspectscore=0 mlxlogscore=872 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305310162 X-Proofpoint-ORIG-GUID: ah20Wfwlpq9TeOmurTjGbdD_0vlOZrG5 X-Proofpoint-GUID: ah20Wfwlpq9TeOmurTjGbdD_0vlOZrG5 X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net > On May 31, 2023, at 3:04 PM, Jason Gunthorpe wrote: >=20 > On Tue, May 23, 2023 at 07:18:18PM +0000, Chuck Lever III wrote: >=20 >> The core address resolution code wants to find an L2 address >> for the egress device. The underlying ib_device, where a made-up >> GID might be stored, is not involved with address resolution >> AFAICT. >=20 > Where are you hitting this? kworker/2:0-26 [002] 551.962874: funcgraph_entry: = | addr_resolve() { kworker/2:0-26 [002] 551.962874: bprint: addr_resol= ve: resolve_neigh=3Dtrue resolve_by_gid_attr=3Dfalse kworker/2:0-26 [002] 551.962874: funcgraph_entry: = | addr4_resolve.constprop.0() { kworker/2:0-26 [002] 551.962875: bprint: addr4_reso= lve.constprop.0: src_in=3D0.0.0.0:35173 dst_in=3D100.72.1.2:20049 kworker/2:0-26 [002] 551.962875: funcgraph_entry: = | ip_route_output_flow() { kworker/2:0-26 [002] 551.962875: funcgraph_entry: = | ip_route_output_key_hash() { kworker/2:0-26 [002] 551.962876: funcgraph_entry: = | ip_route_output_key_hash_rcu() { kworker/2:0-26 [002] 551.962876: funcgraph_entry: 4.526 us= | __fib_lookup(); kworker/2:0-26 [002] 551.962881: funcgraph_entry: 0.264 us= | fib_select_path(); kworker/2:0-26 [002] 551.962881: funcgraph_entry: 1.022 us= | __mkroute_output(); kworker/2:0-26 [002] 551.962882: funcgraph_exit: 6.705 us= | } kworker/2:0-26 [002] 551.962882: funcgraph_exit: 7.283 us= | } kworker/2:0-26 [002] 551.962883: funcgraph_exit: 7.624 us= | } kworker/2:0-26 [002] 551.962883: funcgraph_exit: 8.395 us= | } kworker/2:0-26 [002] 551.962883: funcgraph_entry: = | rdma_set_src_addr_rcu.constprop.0() { kworker/2:0-26 [002] 551.962883: bprint: rdma_set_s= rc_addr_rcu.constprop.0: ndev=3D0xffff91f5135a4000 name=3Dtailscale0 kworker/2:0-26 [002] 551.962884: funcgraph_entry: = | copy_src_l2_addr() { kworker/2:0-26 [002] 551.962884: funcgraph_entry: 0.984 us= | iff_flags2string(); kworker/2:0-26 [002] 551.962885: bprint: copy_src_l= 2_addr: ndev=3D0xffff91f5135a4000 dst_in=3D100.72.1.2:20049 flags=3DUP|POIN= TOPOINT|NOARP|MULTICAST kworker/2:0-26 [002] 551.962885: funcgraph_entry: = | rdma_copy_src_l2_addr() { kworker/2:0-26 [002] 551.962886: funcgraph_entry: 0.148 us= | devtype2string(); kworker/2:0-26 [002] 551.962887: bprint: rdma_copy_= src_l2_addr: name=3Dtailscale0 type=3DNONE src_dev_addr=3D00 00 00 00 00 00= 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00= 00 broadcast=3D00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00= 00 00 00 00 00 00 00 00 00 00 00 00 ifindex=3D3 kworker/2:0-26 [002] 551.962887: funcgraph_exit: 1.488 us= | } kworker/2:0-26 [002] 551.962887: bprint: copy_src_l= 2_addr: network type=3DIB kworker/2:0-26 [002] 551.962887: funcgraph_exit: 3.636 us= | } kworker/2:0-26 [002] 551.962887: funcgraph_exit: 4.275 us= | } Address resolution finds the right device, but there's a zero-value L2 address. Thus it cannot form a unique GID from that. Perhaps there needs to be a call to query_gid in here? -- Chuck Lever