Timo Rothenpieler <timo@xxxxxxxxxxxxxxxx> 于2020年11月18日周三 下午7:28写道： > > Hi, > > After 50b2412b7e7862c5af0cbf4b10d93bc5c712d021 was backported to stable > branches (I only tested 5.4), some serious issues started to arrise. > > According to linux-rdma, the following two patches that need to go along > with 50b2412b7e are missing: > > > 1. 1d5558b1f0de net/mlx5: poll cmd EQ in case of command timeout > > 2. 410bd754cd73 net/mlx5: Add retry mechanism to the command entry ... > > I managed to apply those mostly cleanly after also applying two > dependencies. > So the complete list of needed commits for 5.4 is: > > 1. 3ed879965cc4 net/mlx5: Use async EQ setup cleanup helpers ... > 2. 1d5558b1f0de net/mlx5: poll cmd EQ in case of command timeout > 3. d43b7007dbd1 net/mlx5: Fix a race when moving command ... > 4. 410bd754cd73 net/mlx5: Add retry mechanism to the command entry ... > > With those 4 commits applied, the issue is fixed. > For reference, that's the output I get with 5.4.77: > > > Nov 17 01:12:58 store01 kernel: mlx5_ib: Mellanox Connect-IB Infiniband driver v5.0-0 > > Nov 17 01:12:58 store01 kernel: mlx5_core 0000:01:00.0: cmd_work_handler:887:(pid 383): failed to allocate command entry > > Nov 17 01:12:58 store01 kernel: infiniband mlx5_0: reg_mr_callback:104:(pid 383): async reg mr failed. status -11 > > Nov 17 01:12:58 store01 kernel: mlx5_core 0000:01:00.0: cmd_work_handler:887:(pid 383): failed to allocate command entry > > Nov 17 01:12:58 store01 kernel: mlx5_core 0000:01:00.0: mlx5e_create_mdev_resources:104:(pid 1): alloc td failed, -11 > > Nov 17 01:12:58 store01 kernel: mlx5_0, 1: ipoib_intf_alloc failed -11 > +cc Greg & Sascha Hi, We hit the same problem on mlx5, I've tested four mentioned commits, it works fine, please include them in future 5.4 kernel. Thanks! Jack Wang
