[ewg] max_mr limit with ipath and QLOGIC 7240

[Ralph Campbell]

You can edit /etc/modprobe.conf (or /etc/modprobe.conf.local on SLES)
and edit or add the line:

options ib_ipath lkey_table_size=16

The number is a power of 2 to set the table size.
Then restart the driver ("service openibd restart").

On Thu, 2009-11-19 at 08:09 -0800, Roberto Rey Exposito wrote:
> I have a problem with the Qlogic 7240 card because I can only register
> 4096 memory regions. The ibv_deinfo -v output is:
> 
> -bash-3.2$ ibv_devinfo -v
> hca_id:    ipath0
>     fw_ver:                0.0.0
>     node_guid:            0011:7500:00ff:6857
>     sys_image_guid:            0011:7500:00ff:6857
>     vendor_id:            0x1175
>     vendor_part_id:            29216
>     hw_ver:                0x2
>     board_id:            InfiniPath_QLE7240
>     phys_port_cnt:            1
>     max_mr_size:            0xffffffffffffffff
>     page_size_cap:            0x1000
>     max_qp:                16384
>     max_qp_wr:            16383
>     device_cap_flags:        0x00003d06
>     max_sge:            96
>     max_sge_rd:            0
>     max_cq:                131071
>     max_cqe:            196607
>     max_mr:                4096
> .......................
> 
> The attribute max_mr is only 4096, and in other cards (Mellanox for
> example) this value is 131072.
> 
> Can I change this max_mr value? 
> 
> Sorry for my english
> 
> Bye
> 
> -- 
> Roberto Rey Expósito
>