Hi, I've noticed an issue of `rte_memory_get_nchannel()` or `rte_memory_get_nrank()` always returning zero regardless of the -n or -r options set.
I think this is due to `--in-memory` forcing `conf->no_shconf = 1` [1], which leads to `rte_eal_memdevice_init()` never being executed [2]. I do not fully understand the context of the code, but I can submit a patch that simply removes the `internal_conf->no_shconf == 0` check in `rte_eal_memory_init()` and so always calls `rte_eal_memdevice_init()`. Would that be ok or is there a better way? Alternatively, does `(internal_conf->no_shconf == 0 || internal_conf->in_memory == 1) && ...` make sense here? And one more thing, the 9.1.4 section of the getting started guide states that the number of memory ranks is auto-detected by default, but I can't find any code that performs the auto-detection - am I missing something, or is the documentation wrong here? [1]: https://github.com/DPDK/dpdk/blob/3ee7a3e0e0e0f5a81a4b102a834697bc488fb32f/lib/eal/common/eal_common_options.c#L1815 [2]: https://github.com/DPDK/dpdk/blob/3ee7a3e0e0e0f5a81a4b102a834697bc488fb32f/lib/eal/common/eal_common_memory.c#L1103
