On Wed, Oct 03, 2018 at 07:42:15AM +0000, Damien Le Moal wrote: > Of note also is that host-managed like sequential zone devices are also likely > to show up soon with the work being done in the NVMe standard on the new "Zoned > namespace" feature proposal. These devices will also require a scheduler like > mq-deadline guaranteeing per-zone in-order delivery of sequential write > requests. Looking only at the number of queues of the device is not enough to > choose the best (most reasonnable/appropriate) scheduler. We actually have a plan to avoid the need for a non-reordering scheduler there (including a Linux prototype for it). Lets see if it survives the committee.