[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH RFC v1] libxl: Introduce a template for devices with a controller

On 05/21/2015 07:07 PM, George Dunlap wrote:
We have several outstanding patch series which add devices that have
two levels: a controller and individual devices attached to that

In the interest of consistency, this patch introduces a section that
sketches out a template for interfaces for such devices.

Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
CC: Ian Campbell <ian.campbell@xxxxxxxxxx>
CC: Ian Jackson <ian.jackson@xxxxxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
CC: Juergen Gross <jgross@xxxxxxxx>
CC: Chun Yan Liu <cyliu@xxxxxxxx>
CC: Olaf Hering <olaf@xxxxxxxxx>

So, this is definitely RFC -- I tried to spec things out in a way that
made sense, but I often just chose something that I thought would be a
sensible starting point for discussion.

This spec looks a lot more like the PVUSB spec than the PVSCSI spec,
in part because I think the PVUSB spec has already had a lot more
thought that's gone into it.

A couple of random points to discuss:

* Calling things "controllers", using <type>ctrl for the device name,
   and using "ctrl" as the field name for the devid of the controller
   in the individual devices.

Hmm, what about "device group" (<type>devgoup)? In the scsi world
"controller" would be one level higher in the hierarchy. And the scsi
controller is at least visible in the configuration syntax "h:c:t:l".
Using "controller" for the "c" in this item and for the "t" internally
could lead to confusion.


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.