Re: [Xen-users] [Xen-devel] xen forum

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

On 22/05/13 16:52, Gordan Bobic wrote:
> On Wed, 22 May 2013 16:32:33 +0100, George Dunlap 
> <george.dunlap@xxxxxxxxxxxxx> wrote:
> > On 22/05/13 16:27, Gordan Bobic wrote:
> > > On Wed, 22 May 2013 10:58:30 +0100, George Dunlap 
> > > <George.Dunlap@xxxxxxxxxxxxx> wrote:
> > > > On Wed, May 22, 2013 at 10:53 AM, Ian Campbell
> > > > <Ian.Campbell@xxxxxxxxxx> wrote:
> > > > > On Wed, 2013-05-22 at 07:55 +0100, Gordan Bobic wrote:
> > > > > > Along with a wiki for documentation that is actually kept updated 
> > > > > > when
> > > > > > features are added/removed/changed and more importantly, that 
> > > > > > clearly
> > > > > > states if/when obvious features are unexpectedly and conspicuously
> > > > > > missing
> > > > > The beauty of a wiki is that anyone can edit or correct it.
> > > > >
> > > > > We have regular documentation days where we are all (users and devs
> > > > > alike) encouraged to work to improve the state of the wiki and other
> > > > > documentation.
> > > > >
> > > > > http://wiki.xen.org/wiki/Xen_Document_Days
> > > > >
> > > > > The state of the Xen documentation base has actually improved
> > > > > considerably over the last year due to this initiative.
> > > > >
> > > > > > (e.g. domU config file method of passing multiple USB devices to
> > > > > > domU).
> > > > > I'm not sure what you are referring to here, the config file 
> > > > > syntax is
> > > > > documented in docs/man/xl.cfg.pod.5 which is installed as the 
> > > > > xl.cfg(5)
> > > > > manpage. It is also available online
> > > > > http://xenbits.xen.org/docs/unstable/man/xl.cfg.5.html and referenced
> > > > > from the wiki e.g. http://wiki.xen.org/wiki/Xen_Man_Pages
> > > > >
> > > > > This manpage contains:
> > > > >         =item B<usbdevice=[ "DEVICE", "DEVICE", ...]>
> > > > This is a new feature for 4.3 -- 4.2 and earlier don't support
> > > > multiple USB devices (including say, a host device and an emulated usb
> > > > tablet).
> > > Is this an xl-only feature or will it work with xl as well?
> > It will work with both xl and xl, but not with xm. :-)
> Hmm... Are there any outstanding issues with xl and PCI / VGA 
> passthrough?
> I'm sure I read on the (possibly out of date) wiki that with xl
> PCI passthrough requires FLR, which 99% of devices lack (i.e. makes
> it useless to anyone wanting to do any kind of PCI passthrough).
>
> Perhaps I'll try my VMs with xl tonight and see what, if anything,
> breaks and raise it before time's up for 4.3 release...
Most of the core Xen developers don't use PCI pass-through on a regular 
basis becuase the vast majority of the customers of the companies we 
work for don't use it.  We rely on our users to test what is important 
for them.
So yes, if you want xl to work with PCI / VGA pass-thru, then please 
test it and let us know what doesn't work.
 -George

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