----- Original Message ----- > From: "Sagi Grimberg" <sagi@xxxxxxxxxxx> > To: "Leon Romanovsky" <leonro@xxxxxxxxxxxx>, "Laurence Oberman" <loberman@xxxxxxxxxx> > Cc: "Bart Van Assche" <bart.vanassche@xxxxxxxxxxx>, "Doug Ledford" <dledford@xxxxxxxxxx>, "Max Gurtovoy" > <maxg@xxxxxxxxxxxx>, "Israel Rukshin" <israelr@xxxxxxxxxxxx>, linux-rdma@xxxxxxxxxxxxxxx > Sent: Wednesday, May 3, 2017 4:18:38 AM > Subject: Re: [PATCH, untested] mlx5: Avoid that mlx5_ib_sg_to_klms() overflows the klms[] array > > > >> Hello Bart, Leon, Max and Israel. > >> > >> I cloned off Barts tree. > >> > >> git clone https://github.com/bvanassche/linux > >> cd linux > >> git checkout block-scsi-for-next > >> > >> I checked all patches were in for this test. > >> > >> a83e404 IB/srp: Reenable IB_MR_TYPE_SG_GAPS > >> dfa5a2b mlx5: Avoid that mlx5_ib_sg_to_klms() overflows the klms[] array > >> f759c80 mlx5: Fix mlx5_ib_map_mr_sg mr lengt > >> > >> Built and tested the kernel. > >> > >> However this issue is not resolved :( > >> > >> [ 2707.931909] scsi host1: ib_srp: failed RECV status WR flushed (5) for > >> CQE ffff8817edca86b0 > >> [ 2708.089806] mlx5_0:dump_cqe:262:(pid 20129): dump error cqe > >> [ 2708.121342] 00000000 00000000 00000000 00000000 > >> [ 2708.147104] 00000000 00000000 00000000 00000000 > >> [ 2708.172633] 00000000 00000000 00000000 00000000 > >> [ 2708.198702] 00000000 0f007806 2500002a 14a527d0 > > > > Parsed version: > > hw_error_syndrome : 0xf > > hw_syndrome_type : 0x0 > > vendor_error_syndrome : 0x78 > > syndrome : MEMORY_WINDOW_BIND_ERROR (0x6) > > s_wqe_opcode : UMR (0x25) > > opcode : REQUESTOR_ERROR (0xd) > > cqe_format : NO_INLINE_DATA (0x0) > > owner : 0x0 > > > > Description: > > umr.klm_octoword_count > mkey.mtt_octoword_count > > > > Sagi, Max, > > Any idea where can it be? > > Laurence, Max, > > We need to make sure that we never overflow number of mapping > elements. > > Looking at the code, it seems that some of it was reworked by > Artemy for ODP. > > Laurence, can you try and retest the below patch: > -- > diff --git a/drivers/infiniband/hw/mlx5/qp.c > b/drivers/infiniband/hw/mlx5/qp.c > index ad8a2638e339..76f3857ecd53 100644 > --- a/drivers/infiniband/hw/mlx5/qp.c > +++ b/drivers/infiniband/hw/mlx5/qp.c > @@ -3224,22 +3224,19 @@ static void set_reg_mkey_seg(struct > mlx5_mkey_seg *seg, > struct mlx5_ib_mr *mr, > u32 key, int access) > { > - int ndescs = ALIGN(mr->ndescs, 8) >> 1; > + int size = mr->ndescs * mr->desc_size; > > memset(seg, 0, sizeof(*seg)); > > if (mr->access_mode == MLX5_MKC_ACCESS_MODE_MTT) > seg->log2_page_size = ilog2(mr->ibmr.page_size); > - else if (mr->access_mode == MLX5_MKC_ACCESS_MODE_KLMS) > - /* KLMs take twice the size of MTTs */ > - ndescs *= 2; > > seg->flags = get_umr_flags(access) | mr->access_mode; > seg->qpn_mkey7_0 = cpu_to_be32((key & 0xff) | 0xffffff00); > seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL); > seg->start_addr = cpu_to_be64(mr->ibmr.iova); > seg->len = cpu_to_be64(mr->ibmr.length); > - seg->xlt_oct_size = cpu_to_be32(ndescs); > + seg->xlt_oct_size = cpu_to_be32(get_xlt_octo(size)); > } > > static void set_linv_mkey_seg(struct mlx5_mkey_seg *seg) > -- > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Hello Sagi Against Bart's tree again a83e404 IB/srp: Reenable IB_MR_TYPE_SG_GAPS dfa5a2b mlx5: Avoid that mlx5_ib_sg_to_klms() overflows the klms[] array f759c80 mlx5: Fix mlx5_ib_map_mr_sg mr lengt Above are all in Added your most recent patch above Same behavior. [ 579.368733] scsi host1: ib_srp: failed RECV status WR flushed (5) for CQE ffff8817de9c57b0 [ 579.369875] mlx5_1:dump_cqe:262:(pid 15140): dump error cqe [ 579.369877] 00000000 00000000 00000000 00000000 [ 579.369877] 00000000 00000000 00000000 00000000 [ 579.369878] 00000000 00000000 00000000 00000000 [ 579.369878] 00000000 0f007806 2500002b 1c528dd0 [ 579.369883] scsi host1: ib_srp: failed FAST REG status memory management operation error (6) for CQE ffff88179a460af8 [ 594.814222] scsi host1: ib_srp: reconnect succeeded [ 594.916876] scsi host1: ib_srp: failed RECV status WR flushed (5) for CQE ffff8817e1d4a6b0 [ 595.494532] mlx5_1:dump_cqe:262:(pid 15205): dump error cqe [ 595.525995] 00000000 00000000 00000000 00000000 [ 595.552125] 00000000 00000000 00000000 00000000 [ 595.578204] 00000000 00000000 00000000 00000000 [ 595.603670] 00000000 0f007806 25000033 002d77d0 ^C[ 610.821911] scsi host1: ib_srp: reconnect succeeded [ 610.933298] scsi host1: ib_srp: failed RECV status WR flushed (5) for CQE ffff8817e1d4a170 [ 611.514234] mlx5_1:dump_cqe:262:(pid 15242): dump error cqe [ 611.543083] 00000000 00000000 00000000 00000000 [ 611.568670] 00000000 00000000 00000000 00000000 [ 611.594064] 00000000 00000000 00000000 00000000 [ 611.620142] 00000000 0f007806 2500003b 003161d0 I will capture the function traces with your patch applied and the additional logging asked for by Max. Thanks Laurence -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
