Hi Bart and all, During go through SRP FMR support, I found ib_srp pre-alloc fmr_list/map_page in each request, fmr_list are alloced as many as target->cmd_sg_cnt I add some debug message when run fio test with different settings. Result show, state.ndesc and state.nmdesc is 1, state.npages is 0, after srp_map_sg, my question is : do we really need as many cmd_sg_cnt fmr_list, or I miss something, ndesc and nmdesc could be bigger than 1? -- Mit freundlichen Grüßen, Best Regards, Jack Wang Linux Kernel Developer Storage ProfitBricks GmbH The IaaS-Company. -- 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