[ewg] max_mr limit with ipath and QLOGIC 7240

Roberto Rey Exposito rreye at udc.es
Thu Nov 19 08:09:02 PST 2009


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 ExpĆ³sito 
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