I thought the FMR page list limit was always 64. I seem to vaguely recall testing this way back when I split out the xprtrdma code for handling different registration modes, and above 64, FMR fell over (at least with CX2 and CX3).
Not sure about CX2, but iser runs fmrs with 128 entries perfectly fine on CX3. IIRC CX2 does not support FRWRs, CX4 and up does not support FMRs (which I'd love to kill altogether anyways). The motivation is to not guess empirically what is the max page_list for FMRs which is supposed to be on its way out anyhow. -- 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
