From mboxrd@z Thu Jan 1 00:00:00 1970 From: hch@lst.de (Christoph Hellwig) Date: Tue, 4 Dec 2018 16:07:29 +0100 Subject: [PATCH 10/13] nvme-mpath: remove I/O polling support In-Reply-To: References: <20181202164628.1116-1-hch@lst.de> <20181202164628.1116-11-hch@lst.de> Message-ID: <20181204150729.GD3630@lst.de> On Mon, Dec 03, 2018@05:11:43PM -0800, Sagi Grimberg wrote: >> If it really becomes an issue we >> should rework the nvme code to also skip the multipath code for any >> private namespace, even if that could mean some trouble when rescanning. >> > > This requires some explanation? skip the multipath code how? We currently always go through the multipath node as long the the controller is multipath capable. If we care about e.g. polling on a private namespace on a dual ported U.2 drive we'd have to make sure we don't go through the multipath device node for private namespaces that can only have one path, but only for shared namespaces.