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Re: [Xen-users] In the process of deciding to virtualize, manyuncertaint

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] In the process of deciding to virtualize, manyuncertainties
From: kcobler@xxxxxxxxxxxxxx
Date: Fri, 29 Oct 2010 07:10:59 -0500
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Quoting "harry@xxxxxxxxxxxx" <harry@xxxxxxxxxxxx>:

Hi all,

did some more research after the tip on the USB server. Seems that none of
the hardware solutions support linux VMs.

However, I found one link to a free software solution, tested by a linux
user, and he claims it works just fine. His story you can find here:


The software you can find here: http://www.incentivespro.com

Of course, I stumbled on my first problem:

The installer tells me this:


Kernels versions 2.6.25 through have a bug with EHCI USB
controllers that leads to large memory leaks with isochronous devices like
Webcams or Sound cards.

If you have patched your kernel against this bug - please manually
recompile the driver executing 'make USE_EHCI_FIX=n' command. Otherwise USB
Server will try to automatically walk around this bug (without guaranties)

See http://patchwork.kernel.org/patch/13428/ for more information.

Please do not worry about this warning if you are not going to use USB 2.0
isochronous devices on your system.


Xenserver 5.6.0 is running on I basically don't know if this
will be an issue for me (I am only using USB HDDs, USB printer and USB card
readers), so I decided for now just to skip this recompiling message. Would
be nice though if anybody can tell me if XenServer still has this bug?

Second problem is when I continue with the installer I get the error "make
command not found". On the Xenserver site I found information on this
topic, where it is said that make is not included.


Developer kid needs to be installed. Can somebody tell me if there is
another way? Like downloading cmake from the internet and compile it? If
not, is there a more detailed description in how to fix this?

Would be great if this software would work. The software vendor claims that
it supports VMware.



if the know issues are going to be solved:

- USB printer in XP VM
- HDD via USB cable visible in XP VM
- Burning DVDs on XP VM

My solution for USB in a VM environment is USB over IP device.


This device allowed me to add a USB hub to support multiple USB
devices. Also the device is supported by Windows 2003/XP, etc. I also
could have different devices attached to different VMs at the same time.

Since XP is supported by many USB over IP devices, there are solutions for those guest OSes.

As for Linux guest OS, I would let dom0 manage the device for the Linux guests. Use Samba or NFS to mount the USB HDD to the Linux guests. Use CUPS to access USB printer on dom0 inside Linux or XP guest.

Ken Cobler

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