[PATCH 8/9] nvme: implement multipath access to nvme subsystems
hare at suse.de
Mon Sep 25 07:05:17 PDT 2017
On 09/25/2017 03:50 PM, Christoph Hellwig wrote:
> On Mon, Sep 25, 2017 at 03:47:43PM +0200, Hannes Reinecke wrote:
>> Can't we make the multipath support invisible to the host?
>> IE check the shared namespaces before creating the device node, and just
>> move them under the existing namespaces if one exists?
> That was what my first version did, but various people talked me
> out of it. Unfortunately just multiplexing breaks a few things,
> including the userspace passthrough ioctls.
Care to give some specifics?
How would userspace passthrough be affected?
I would've thought that we're sending the ioctl down one path, and we'd
be getting the completion back on the same path/queue/whatever.
(Unless we're talking multi-command ioctls, but those are evil anyway)
Dr. Hannes Reinecke Teamlead Storage & Networking
hare at suse.de +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
More information about the Linux-nvme