Re: "memory management error" with NFS/RDMA on RoCE

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On Thu, Jun 22, 2017 at 12:28 PM, Chuck Lever <chuck.lever@xxxxxxxxxx> wrote:
> While running xfstests on an NFS/RDMA mount, I see this in
> the client's /var/log/messages multiple times:
>
> Jun 22 14:13:45 manet kernel: mlx5_0:dump_cqe:275:(pid 0): dump error cqe
> Jun 22 14:13:45 manet kernel: 00000000 00000000 00000000 00000000
> Jun 22 14:13:45 manet kernel: 00000000 00000000 00000000 00000000
> Jun 22 14:13:45 manet kernel: 00000000 00000000 00000000 00000000
> Jun 22 14:13:45 manet kernel: 00000000 08007806 250000cd 024027d3
> Jun 22 14:13:45 manet kernel: rpcrdma: fastreg: memory management operation error (6/0x78)
>
> As far as I can tell the client is able to recover and continue
> the test. However, this error is not supposed to happen in normal
> operation.
>
> This is with a Mellanox CX4 in RoCEv1 mode, v4.12-rc2.
>
>
> --
> Chuck Lever

Surprisingly, I've hit this today on iSER, but using 4.9 using CX4 ROcEv2 IPv6:

[Thu Jun 22 14:37:11 2017] mlx5_0:dump_cqe:262:(pid 0): dump error cqe
[Thu Jun 22 14:37:11 2017] 00000000 00000000 00000000 00000000
[Thu Jun 22 14:37:11 2017] 00000000 00000000 00000000 00000000
[Thu Jun 22 14:37:11 2017] 00000000 00000000 00000000 00000000
[Thu Jun 22 14:37:11 2017] 00000000 08007806 2500011f ca4f0fd3
[Thu Jun 22 14:37:11 2017] iser: iser_err_comp: memreg failure: memory
management operation error (6) vend_err 78
[Thu Jun 22 14:37:11 2017]  connection4:0: detected conn error (1011)

----------------
Robert LeBlanc
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