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xen-devel

Re: [Xen-devel] Virtualization project idea

On Fri, Aug 27, 2010 at 06:33:35PM +0530, Dhananjay Goel wrote:
>    Yes, exactly. So, we wanted to know if it is possible to *share USB*
>    across VMs.
> 

I don't think USB protocol has been designed for *sharing*. 
I'm pretty certain only one computer/device/VM can use USB device at a time.

-- Pasi

>    Thanks,
>    Dhananjay
> 
>    On Fri, Aug 27, 2010 at 6:23 PM, Pasi Kärkkäinen <[1]pasik@xxxxxx> wrote:
> 
>      On Fri, Aug 27, 2010 at 06:16:32PM +0530, Dhananjay Goel wrote:
>      >    How are you sharing USB flash drives with physical machines
>      >    Comment: In ubuntu, plug in flash drive and access /media folder.
>      Then
>      >    right click and click on "Sharing Options". Once you share it and
>      give
>      >    others the right to add/edit the files, they can do so.
>      >
> 
>      That's NOT USB sharing at all!
>      That's just a general filesystem share (nfs,cifs,whatever network
>      share).
> 
>      You can do that with Xen, over the network, just like with physical
>      machines.
> 
>      -- Pasi
> 
>      >    Thanks,
>      >    Dhananjay
>      >
>      >    On Fri, Aug 27, 2010 at 5:24 PM, Pasi K*rkk*inen
>      <[1][2]pasik@xxxxxx> wrote:
>      >
>      >      On Fri, Aug 27, 2010 at 04:56:33PM +0530, Dhananjay Goel wrote:
>      >      > * *Also you wouldn't see the changes made in other VMs,
>      >      > * *unless you made sure all the caches are refreshed etc in the
>      VM all
>      >      the
>      >      > * *time.
>      >      >
>      >      > * *You'd need to use some cluster-filesystem (GFS, GFS2, OCFS2,
>      GPFS,
>      >      etc).
>      >      > * *--Can you please suggest how NFS manages this because this
>      case is
>      >      handled
>      >      > * *by NFS without any corruption?
>      >      > * *We can share flash drive across VMs as we do with physical
>      machines
>      >      in
>      >      > * *LAN. Please help!
>      >      >
>      >
>      >      How are you sharing USB flash drives with physical machines?
>      >
>      >      -- Pasi
>      >
>      >      > * *Thanks,
>      >      > * *Dhananjay
>      >      >
>      >      > * *On Fri, Aug 27, 2010 at 4:27 PM, Pasi K*rkk*inen
>      >      <[1][2][3]pasik@xxxxxx> wrote:
>      >      >
>      >      > * * *On Fri, Aug 27, 2010 at 02:53:54PM +0530, Dhananjay Goel
>      wrote:
>      >      > * * *> * *This won't be straight forward. Think about USB
>      memory/flash
>      >      stick.
>      >      > * * *> * *If every VM sees it, and simultaneously writes to it,
>      the
>      >      > * * *filesystem
>      >      > * * *> * *in it will get corrupted immediately!
>      >      > * * *>
>      >      > * * *> * *--Why would it get corrupted immediately. Might be we
>      can
>      >      just lock
>      >      > * * *a
>      >      > * * *> * *specific file which is being edited? Please suggest.
>      >      > * * *>
>      >      >
>      >      > * * *Because USB level has no idea about filesystems or files,
>      or
>      >      locking
>      >      > * * *them!
>      >      >
>      >      > * * *Say you're using ext3 or NTFS in the VM for the USB
>      device.
>      >      > * * *Those filesystems are NOT cluster-aware, ie. they're not
>      aware of
>      >      any
>      >      > * * *sharing,
>      >      > * * *and they don't support any kind of sharing.
>      >      >
>      >      > * * *They expect exclusive access to the device.
>      >      >
>      >      > * * *If suddenly the bits on the device change from outside,
>      >      > * * *the filesystem gets corrupted very easily.
>      >      >
>      >      > * * *Also you wouldn't see the changes made in other VMs,
>      >      > * * *unless you made sure all the caches are refreshed etc in
>      the VM
>      >      all the
>      >      > * * *time.
>      >      >
>      >      > * * *You'd need to use some cluster-filesystem (GFS, GFS2,
>      OCFS2,
>      >      GPFS, etc).
>      >      >
>      >      > * * *-- Pasi
>      >      >
>      >      > * * *> * *Thanks,
>      >      > * * *> * *Dhananjay
>      >      > * * *>
>      >      > * * *> * *On Fri, Aug 27, 2010 at 2:49 PM, Pasi K*rkk*inen
>      >      > * * *<[1][2][3][4]pasik@xxxxxx> wrote:
>      >      > * * *>
>      >      > * * *> * * *On Fri, Aug 27, 2010 at 02:45:12PM +0530, Dhananjay
>      Goel
>      >      wrote:
>      >      > * * *> * * *> * *No, that's not possible with pvusb. pvusb is
>      for
>      >      direct
>      >      > * * *passthru to
>      >      > * * *> * * *> * *one/single vm.
>      >      > * * *> * * *> * *You'd need some filesystem share
>      (cifs/nfs/whatnot)
>      >      to make
>      >      > * * *such
>      >      > * * *> * * *sharing
>      >      > * * *> * * *> * *possible.
>      >      > * * *> * * *> * *Comments: Is it possible to share USB
>      keyboard, USB
>      >      mouse,
>      >      > * * *USB
>      >      > * * *> * * *modem, etc
>      >      > * * *> * * *> * *across VMs i.e host and guest(s)? If we
>      connect USB
>      >      > * * *keyboard, is it
>      >      > * * *> * * *> * *possible to use it in guests?
>      >      > * * *> * * *>
>      >      > * * *>
>      >      > * * *> * * *This is implemented in XCI (Xen Client Initiative),
>      and
>      >      there has
>      >      > * * *been
>      >      > * * *> * * *some discussions how to get it traditional Xen, to
>      help
>      >      Xen VGA
>      >      > * * *> * * *Passthrough usage.
>      >      > * * *>
>      >      > * * *> * * *See:
>      >      [2][3][4][5]http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>      >      > * * *> * * *> * *Also, is it possible for us to modify the
>      device
>      >      driver of
>      >      > * * *USB 2.0
>      >      > * * *> * * *so that
>      >      > * * *> * * *> * *all USB 2.0 devices are visible and can be
>      used
>      >      across all
>      >      > * * *VMs?
>      >      > * * *> * * *Please
>      >      > * * *> * * *> * *suggest.
>      >      > * * *> * * *>
>      >      > * * *>
>      >      > * * *> * * *This won't be straight forward. Think about USB
>      >      memory/flash
>      >      > * * *stick.
>      >      > * * *> * * *If every VM sees it, and simultaneously writes to
>      it, the
>      >      > * * *filesystem
>      >      > * * *> * * *in it will get corrupted immediately!
>      >      > * * *>
>      >      > * * *> * * *USB Passthru cannot be used to 'share' devices,
>      it's for
>      >      giving
>      >      > * * *> * * *one/single VM
>      >      > * * *> * * *direct access to the device.
>      >      > * * *>
>      >      > * * *> * * *-- Pasi
>      >      > * * *>
>      >      > * * *> * * *> * *Thanks,
>      >      > * * *> * * *> * *Dhananjay
>      >      > * * *> * * *>
>      >      > * * *> * * *> * *On Fri, Aug 27, 2010 at 2:16 PM, Pasi
>      K*rkk*inen
>      >      > * * *> * * *<[1][3][4][5][6]pasik@xxxxxx> wrote:
>      >      > * * *> * * *>
>      >      > * * *> * * *> * * *On Fri, Aug 27, 2010 at 01:37:49PM +0530,
>      Dhananjay
>      >      Goel
>      >      > * * *wrote:
>      >      > * * *> * * *> * * *> * *Hi James/Pasi,
>      >      > * * *> * * *> * * *> * *I had a look at
>      >      > * * *> * * *>
>      >      > * * *
>      >
>       [1][2][4][5][6][7]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * * *> * * *> * * *> * *But I'm not sure if it supports sharing
>      USB
>      >      devices
>      >      > * * *across
>      >      > * * *> * * *VMs
>      >      > * * *> * * *> * * *(host and
>      >      > * * *> * * *> * * *> * *guest) i.e. if I plug in a flash drive
>      then it
>      >      would
>      >      > * * *detect
>      >      > * * *> * * *in both
>      >      > * * *> * * *> * * *host
>      >      > * * *> * * *> * * *> * *and guest and I'd be able edit files
>      from all
>      >      VMs
>      >      > * * *rather
>      >      > * * *> * * *than
>      >      > * * *> * * *> * * *mounting and
>      >      > * * *> * * *> * * *> * *unmounting everytime from 1 VM to
>      other.
>      >      > * * *> * * *> * * *> * *Please let me know your thoughts on it.
>      >      > * * *> * * *> * * *>
>      >      > * * *> * * *>
>      >      > * * *> * * *> * * *No, that's not possible with pvusb. pvusb is
>      for
>      >      direct
>      >      > * * *passthru
>      >      > * * *> * * *to
>      >      > * * *> * * *> * * *one/single vm.
>      >      > * * *> * * *> * * *You'd need some filesystem share
>      (cifs/nfs/whatnot)
>      >      to
>      >      > * * *make such
>      >      > * * *> * * *sharing
>      >      > * * *> * * *> * * *possible.
>      >      > * * *> * * *>
>      >      > * * *> * * *> * * *-- Pasi
>      >      > * * *> * * *> * * *> * *Thanks,
>      >      > * * *> * * *> * * *> * *Dhananjay
>      >      > * * *> * * *> * * *>
>      >      > * * *> * * *> * * *> * *On Fri, Aug 27, 2010 at 4:28 AM, James
>      Harper
>      >      > * * *> * * *> * * *> *
>      *<[2][3][5][6][7][8]james.harper@xxxxxxxxxxxxxxxx>
>      >      wrote:
>      >      > * * *> * * *> * * *>
>      >      > * * *> * * *> * * *> * * *> Hi there!
>      >      > * * *> * * *> * * *> * * *>
>      >      > * * *> * * *> * * *> * * *> First I'd like to say that XEN
>      plaform is
>      >      really
>      >      > * * *cool
>      >      > * * *> * * *and
>      >      > * * *> * * *> * * *awesome.
>      >      > * * *> * * *> * * *> * * *>
>      >      > * * *> * * *> * * *> * * *> I'm an engineering student and is
>      >      searching for a
>      >      > * * *> * * *feasible
>      >      > * * *> * * *> * * *project in
>      >      > * * *> * * *> * * *> * * *> virtualization. I'd like to know if
>      its
>      >      possible
>      >      > * * *to
>      >      > * * *> * * *share USB
>      >      > * * *> * * *> * * *devices
>      >      > * * *> * * *> * * *> * * *(flash
>      >      > * * *> * * *> * * *> * * *> drive, hard disk, mouse, keyboards
>      etc)
>      >      across
>      >      > * * *guests
>      >      > * * *> * * *and host
>      >      > * * *> * * *> * * *(VMs).
>      >      > * * *> * * *> * * *> * * *Also, do
>      >      > * * *> * * *> * * *> * * *> you have any idea to extend it? Or
>      any
>      >      innovative
>      >      > * * *idea
>      >      > * * *> * * *so that
>      >      > * * *> * * *> * * *we can
>      >      > * * *> * * *> * * *> * * *> implement it.
>      >      > * * *> * * *> * * *> * * *>
>      >      > * * *> * * *> * * *> * * *> I'd appreciate any help. Thanks in
>      >      advance.
>      >      > * * *> * * *> * * *> * * *>
>      >      > * * *> * * *> * * *>
>      >      > * * *> * * *> * * *> * * *Further to what Pasi said, I have
>      partially
>      >      ported
>      >      > * * *the
>      >      > * * *> * * *backend
>      >      > * * *> * * *> * * *interface
>      >      > * * *> * * *> * * *> * * *and can hand you the code if you
>      want. It's
>      >      > * * *probable a bit
>      >      > * * *> * * *stale
>      >      > * * *> * * *> * * *vs the
>      >      > * * *> * * *> * * *> * * *current kernels and leaks memory
>      under some
>      >      > * * *circumstances
>      >      > * * *> * * *but is
>      >      > * * *> * * *> * * *> * * *probably better than starting from
>      scratch.
>      >      > * * *> * * *> * * *> * * *James
>      >      > * * *> * * *> * * *>
>      >      > * * *> * * *> * * *> References
>      >      > * * *> * * *> * * *>
>      >      > * * *> * * *> * * *> * *Visible links
>      >      > * * *> * * *> * * *> * *1.
>      >      > * *
>      *[4][6][7][8][9]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * * *> * * *> * * *> * *2.
>      >      mailto:[5][7][8][9][10]james.harper@xxxxxxxxxxxxxxxx
>      >      > * * *> * * *>
>      >      > * * *> * * *> References
>      >      > * * *> * * *>
>      >      > * * *> * * *> * *Visible links
>      >      > * * *> * * *> * *1. mailto:[8][9][10][11]pasik@xxxxxx
>      >      > * * *> * * *> * *2.
>      >      > * *
>      *[9][10][11][12]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * * *> * * *> * *3.
>      mailto:[10][11][12][13]james.harper@xxxxxxxxxxxxxxxx
>      >      > * * *> * * *> * *4.
>      >      > * *
>      *[11][12][13][14]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * * *> * * *> * *5.
>      mailto:[12][13][14][15]james.harper@xxxxxxxxxxxxxxxx
>      >      > * * *>
>      >      > * * *> References
>      >      > * * *>
>      >      > * * *> * *Visible links
>      >      > * * *> * *1. mailto:[14][15][16]pasik@xxxxxx
>      >      > * * *> * *2.
>      >      [15][16][17]http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>      >      > * * *> * *3. mailto:[16][17][18]pasik@xxxxxx
>      >      > * * *> * *4.
>      >      [17][18][19]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * * *> * *5. mailto:[18][19][20]james.harper@xxxxxxxxxxxxxxxx
>      >      > * * *> * *6.
>      >      [19][20][21]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * * *> * *7. mailto:[20][21][22]james.harper@xxxxxxxxxxxxxxxx
>      >      > * * *> * *8. mailto:[21][22][23]pasik@xxxxxx
>      >      > * * *> * *9.
>      >      [22][23][24]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * * *> * 10. mailto:[23][24][25]james.harper@xxxxxxxxxxxxxxxx
>      >      > * * *> * 11.
>      >      [24][25][26]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * * *> * 12. mailto:[25][26][27]james.harper@xxxxxxxxxxxxxxxx
>      >      >
>      >      > References
>      >      >
>      >      > * *Visible links
>      >      > * *1. mailto:[27][28]pasik@xxxxxx
>      >      > * *2. mailto:[28][29]pasik@xxxxxx
>      >      > * *3.
>      [29][30]http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>      >      > * *4. mailto:[30][31]pasik@xxxxxx
>      >      > * *5.
>      [31][32]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * *6. mailto:[32][33]james.harper@xxxxxxxxxxxxxxxx
>      >      > * *7.
>      [33][34]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * *8. mailto:[34][35]james.harper@xxxxxxxxxxxxxxxx
>      >      > * *9. mailto:[35][36]pasik@xxxxxx
>      >      > * 10.
>      [36][37]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * 11. mailto:[37][38]james.harper@xxxxxxxxxxxxxxxx
>      >      > * 12.
>      [38][39]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * 13. mailto:[39][40]james.harper@xxxxxxxxxxxxxxxx
>      >      > * 14. mailto:[40][41]pasik@xxxxxx
>      >      > * 15.
>      [41][42]http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>      >      > * 16. mailto:[42][43]pasik@xxxxxx
>      >      > * 17.
>      [43][44]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * 18. mailto:[44][45]james.harper@xxxxxxxxxxxxxxxx
>      >      > * 19.
>      [45][46]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * 20. mailto:[46][47]james.harper@xxxxxxxxxxxxxxxx
>      >      > * 21. mailto:[47][48]pasik@xxxxxx
>      >      > * 22.
>      [48][49]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * 23. mailto:[49][50]james.harper@xxxxxxxxxxxxxxxx
>      >      > * 24.
>      [50][51]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >      > * 25. mailto:[51][52]james.harper@xxxxxxxxxxxxxxxx
>      >
>      > References
>      >
>      >    Visible links
>      >    1. mailto:[53]pasik@xxxxxx
>      >    2. mailto:[54]pasik@xxxxxx
>      >    3. mailto:[55]pasik@xxxxxx
>      >    4. [56]http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>      >    5. mailto:[57]pasik@xxxxxx
>      >    6. [58]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >    7. mailto:[59]james.harper@xxxxxxxxxxxxxxxx
>      >    8. [60]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >    9. mailto:[61]james.harper@xxxxxxxxxxxxxxxx
>      >   10. mailto:[62]pasik@xxxxxx
>      >   11. [63]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   12. mailto:[64]james.harper@xxxxxxxxxxxxxxxx
>      >   13. [65]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   14. mailto:[66]james.harper@xxxxxxxxxxxxxxxx
>      >   15. mailto:[67]pasik@xxxxxx
>      >   16. [68]http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>      >   17. mailto:[69]pasik@xxxxxx
>      >   18. [70]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   19. mailto:[71]james.harper@xxxxxxxxxxxxxxxx
>      >   20. [72]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   21. mailto:[73]james.harper@xxxxxxxxxxxxxxxx
>      >   22. mailto:[74]pasik@xxxxxx
>      >   23. [75]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   24. mailto:[76]james.harper@xxxxxxxxxxxxxxxx
>      >   25. [77]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   26. mailto:[78]james.harper@xxxxxxxxxxxxxxxx
>      >   27. mailto:[79]pasik@xxxxxx
>      >   28. mailto:[80]pasik@xxxxxx
>      >   29. [81]http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>      >   30. mailto:[82]pasik@xxxxxx
>      >   31. [83]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   32. mailto:[84]james.harper@xxxxxxxxxxxxxxxx
>      >   33. [85]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   34. mailto:[86]james.harper@xxxxxxxxxxxxxxxx
>      >   35. mailto:[87]pasik@xxxxxx
>      >   36. [88]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   37. mailto:[89]james.harper@xxxxxxxxxxxxxxxx
>      >   38. [90]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   39. mailto:[91]james.harper@xxxxxxxxxxxxxxxx
>      >   40. mailto:[92]pasik@xxxxxx
>      >   41. [93]http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>      >   42. mailto:[94]pasik@xxxxxx
>      >   43. [95]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   44. mailto:[96]james.harper@xxxxxxxxxxxxxxxx
>      >   45. [97]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   46. mailto:[98]james.harper@xxxxxxxxxxxxxxxx
>      >   47. mailto:[99]pasik@xxxxxx
>      >   48. [100]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   49. mailto:[101]james.harper@xxxxxxxxxxxxxxxx
>      >   50. [102]http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>      >   51. mailto:[103]james.harper@xxxxxxxxxxxxxxxx
> 
> References
> 
>    Visible links
>    1. mailto:pasik@xxxxxx
>    2. mailto:pasik@xxxxxx
>    3. mailto:pasik@xxxxxx
>    4. mailto:pasik@xxxxxx
>    5. http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>    6. mailto:pasik@xxxxxx
>    7. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>    8. mailto:james.harper@xxxxxxxxxxxxxxxx
>    9. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   10. mailto:james.harper@xxxxxxxxxxxxxxxx
>   11. mailto:pasik@xxxxxx
>   12. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   13. mailto:james.harper@xxxxxxxxxxxxxxxx
>   14. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   15. mailto:james.harper@xxxxxxxxxxxxxxxx
>   16. mailto:pasik@xxxxxx
>   17. http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>   18. mailto:pasik@xxxxxx
>   19. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   20. mailto:james.harper@xxxxxxxxxxxxxxxx
>   21. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   22. mailto:james.harper@xxxxxxxxxxxxxxxx
>   23. mailto:pasik@xxxxxx
>   24. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   25. mailto:james.harper@xxxxxxxxxxxxxxxx
>   26. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   27. mailto:james.harper@xxxxxxxxxxxxxxxx
>   28. mailto:pasik@xxxxxx
>   29. mailto:pasik@xxxxxx
>   30. http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>   31. mailto:pasik@xxxxxx
>   32. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   33. mailto:james.harper@xxxxxxxxxxxxxxxx
>   34. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   35. mailto:james.harper@xxxxxxxxxxxxxxxx
>   36. mailto:pasik@xxxxxx
>   37. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   38. mailto:james.harper@xxxxxxxxxxxxxxxx
>   39. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   40. mailto:james.harper@xxxxxxxxxxxxxxxx
>   41. mailto:pasik@xxxxxx
>   42. http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>   43. mailto:pasik@xxxxxx
>   44. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   45. mailto:james.harper@xxxxxxxxxxxxxxxx
>   46. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   47. mailto:james.harper@xxxxxxxxxxxxxxxx
>   48. mailto:pasik@xxxxxx
>   49. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   50. mailto:james.harper@xxxxxxxxxxxxxxxx
>   51. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   52. mailto:james.harper@xxxxxxxxxxxxxxxx
>   53. mailto:pasik@xxxxxx
>   54. mailto:pasik@xxxxxx
>   55. mailto:pasik@xxxxxx
>   56. http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>   57. mailto:pasik@xxxxxx
>   58. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   59. mailto:james.harper@xxxxxxxxxxxxxxxx
>   60. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   61. mailto:james.harper@xxxxxxxxxxxxxxxx
>   62. mailto:pasik@xxxxxx
>   63. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   64. mailto:james.harper@xxxxxxxxxxxxxxxx
>   65. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   66. mailto:james.harper@xxxxxxxxxxxxxxxx
>   67. mailto:pasik@xxxxxx
>   68. http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>   69. mailto:pasik@xxxxxx
>   70. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   71. mailto:james.harper@xxxxxxxxxxxxxxxx
>   72. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   73. mailto:james.harper@xxxxxxxxxxxxxxxx
>   74. mailto:pasik@xxxxxx
>   75. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   76. mailto:james.harper@xxxxxxxxxxxxxxxx
>   77. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   78. mailto:james.harper@xxxxxxxxxxxxxxxx
>   79. mailto:pasik@xxxxxx
>   80. mailto:pasik@xxxxxx
>   81. http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>   82. mailto:pasik@xxxxxx
>   83. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   84. mailto:james.harper@xxxxxxxxxxxxxxxx
>   85. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   86. mailto:james.harper@xxxxxxxxxxxxxxxx
>   87. mailto:pasik@xxxxxx
>   88. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   89. mailto:james.harper@xxxxxxxxxxxxxxxx
>   90. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   91. mailto:james.harper@xxxxxxxxxxxxxxxx
>   92. mailto:pasik@xxxxxx
>   93. http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>   94. mailto:pasik@xxxxxx
>   95. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   96. mailto:james.harper@xxxxxxxxxxxxxxxx
>   97. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>   98. mailto:james.harper@xxxxxxxxxxxxxxxx
>   99. mailto:pasik@xxxxxx
>  100. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>  101. mailto:james.harper@xxxxxxxxxxxxxxxx
>  102. http://wiki.xensource.com/xenwiki/XenUSBPassthrough
>  103. mailto:james.harper@xxxxxxxxxxxxxxxx

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