Re: Is: QXL in Xen (busted) Was :Re: Xen 4.5-rc1 update (RC1 is out 2014-Oct-24th)

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Mon, Nov 03, 2014 at 12:05:44PM +0100, Fabio Fantoni wrote:
> Il 31/10/2014 15:33, Konrad Rzeszutek Wilk ha scritto:
> >>I always posted all versions of the patch in xen-devel, the latest was long
> >>time ago.
> >Sometimes you need to poke the maintainers. They (at least
> >I do) have mailboxes so packed that sometimes emails end up
> >going missing. But I think their arguments is going to be:
> >lets figure out what is broken before putting this in the source.
> >
> >.. snip..
> >>>Does SPICE always have to be enabled to use QXL?
> >>>
> >.. snip ..
> >>Xen with spice full working on both windows and linux (including
> >>save/restore) used for both vkvm and thin client I think would be perfect.
> >Right. But there is some work needed in that area (figure out what
> >is happening on Linux).
> >
> >..snip..
> >>>OK, looking at how the driver is setup - it seems that there is an QXL
> >>>KMS driver. If you boot without Xorg running but just with in the console
> >>>can
> >>>you use 'fbset' or any other framebuffer tools (linux-fb-tools)?
> >>>That is I am curious to see whether the 'FB' is working properly first
> >>>before figuring out whether Xorg is working.
> >>>
> >>Some tests ago I tried without xorg to see if kernel parts is ok (advice of
> >>other developer) and seems was ok.
> >What did you test? There is an 'drm-test' tool that was floating around?
> >(http://cgit.freedesktop.org/mesa/drm/)
> >
> >It allows you to run most (if not all) of the Xorg functionality - but
> >using an tool from user-space - and with much more exposure of what
> >went wrong.
> >
> >Could you try the following (without having Xorg in either guest):
> >  1). Boot up your KVM guest, install said tool - run it. Record what
> >     works and what does not.
> >
> >  2). Boot up your Xen guest, and do the same thing.
> >
> >That should narrow down which of the hundreds' of DRM ioctls is failing
> >when using spice under Xen. And that ought to help narrow down this further.
> >
> >I can help you a bit by sending you some debug patches, thought I do
> >have to warn you that I am under a lot of time-pressure so my response
> >is not as fast as I would want it to be.
> >
> 
> I tested only without xorg, just console with drm without particular tests.
> 
> I can't find the drm-test tool you mentioned, is it available in debian
> and/or fedora repositories an what is it called?
> I also did a quick google search and found only something about wayland and
> not about X.org.

I mentioned the URL in the email, but here it is again:

http://cgit.freedesktop.org/mesa/drm/

You will need to compile it, etc.
> 
> Thanks for any reply and sorry for my bad english.