linux-kernel - Re: USB mini-summit at LinuxCon Vancouver

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Date:	Mon, 08 Aug 2011 16:37:46 -0300
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
CC:	Hans de Goede <hdegoede@...hat.com>, Greg KH <greg@...ah.com>,
	linux-usb@...r.kernel.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org, libusb-devel@...ts.sourceforge.net,
	Alexander Graf <agraf@...e.de>,
	Gerd Hoffmann <kraxel@...hat.com>, hector@...cansoft.com,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Stefan Hajnoczi <stefanha@...ux.vnet.ibm.com>,
	pbonzini@...hat.com, Anthony Liguori <aliguori@...ibm.com>,
	Jes Sorensen <Jes.Sorensen@...hat.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Oliver Neukum <oliver@...kum.org>, Felipe Balbi <balbi@...com>,
	Clemens Ladisch <clemens@...isch.de>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Theodore Kilgore <kilgota@...ach.math.auburn.edu>,
	Adam Baker <linux@...er-net.org.uk>
Subject: Re: USB mini-summit at LinuxCon Vancouver

Hi Sarah,

Em 08-08-2011 14:58, Sarah Sharp escreveu:
> On Fri, Aug 05, 2011 at 09:45:56AM +0200, Hans de Goede wrote:
>> Hi,
>>
>> On 08/05/2011 12:56 AM, Greg KH wrote:
>>> On Thu, Aug 04, 2011 at 07:21:47PM -0300, Mauro Carvalho Chehab wrote:
>> I think it is important to separate oranges from apples here, there are
>> at least 3 different problem classes which all seem to have gotten thrown
>> onto a pile here:
>>
>> 1) The reason Mauro suggested having some discussion on this at the
>> USB summit is because of a discussion about dual mode cameras on the
>> linux media list.
> ...
>> 3) Re-direction of usb devices to virtual machines. This works by using
>> the userspace usbfs interface from qemu / vmware / virtualbox / whatever.
>> The basics of this work fine, but it lacks proper locking / safeguards
>> for when a vm takes over a usb device from the in kernel driver.
> 
> Hi Hans and Mauro,
> 
> We have do room in the schedule for the USB mini-summit for this
> discussion, since the schedule is still pretty flexible.  The
> preliminary schedule is up here:
> 
> http://userweb.kernel.org/~sarah/linuxcon-usb-minisummit.html
> 
> I think it's best to discuss the VM redirection in the afternoon when
> some of the KVM folks join us after Hans' talk on USB redirection over
> the network.
> 
> It sounds like we need a separate topic for the dual mode cameras and TV
> tuners.  

Yes, I suspect so. This subject is pending for quite some time, and it would
be good to have people think together around a solution for that.

> Mauro, do you want to lead that discussion in the early morning
> (in a 9:30 to 10:30 slot) or in the late afternoon (in a 15:30 to 16:30
> slot)?  I want to be sure we have all the video/media developers who are
> interested in this topic present, and I don't know if they will be going
> to the KVM forum.

>From my side, both slots work ok. Hans, what would fit better for you?

> Link PM was originally slated for the 10am slot, but since we're missing
> several people for that discussion (Alan Stern, Andiry Xu, and any of
> the Intel folks who did the Moorestown USB 2.0 LPM), I think it will be
> more useful to have that discussion on-list or at another conference.
> 
> Sarah Sharp

Thanks!
Mauro
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