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



On 05/22/2013 04:52 PM, 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I'm sure I read on the (possibly out of date) wiki that with xl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...

OK, I can confirm that my VM configs start OK using xl. Unfortunately, xl in 4.2 doesn't support usb-add, so I cannot pass the required USB devices through, over and above the one I can pass in the config file.

Will usb-add also be available in 4.3, in addition to the multi-device syntax in the config file?

Any chance of the multi-device syntax also being patched into xm for 4.3?

Gordan


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