On Sat, Oct 28, 2017 at 06:09:46PM +0800, Guan Junxiong wrote: > Does it mean some extra works such as: > 1) showing the path topology of nvme multipath device It's in sysfs. And Johannes volunteered to also add nvme-cli support. > 2) daemon to implement immediate and delayed failback The whole point is to not have a daemon. > 3) detecting sub-healthy path due to shaky link We can do this in kernel space. It just needs someone to implement it. > 4) grouping paths besides ANA We don't want to do non-standard grouping. Please work with the NVMe working group for your grouping ideas.