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Re: [Xen-devel] [RFC] Virtual disk configuration, PV vs. emulated, backw

To: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [RFC] Virtual disk configuration, PV vs. emulated, backward compatibility etc
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Thu, 29 Jul 2010 17:14:02 +0100
Cc: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
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On Thu, 29 Jul 2010, Ian Jackson wrote:
> Stefano Stabellini writes ("Re: [Xen-devel] [RFC] Virtual disk configuration, 
> PV vs. emulated, backward compatibility etc"):
> > On Thu, 29 Jul 2010, Ian Jackson wrote:
> > > Well, no, they can't, because their bootloader probably doesn't
> > > understand anything besides what they're actually using.
> > 
> > they only have to change the device name, not the device class
> 
> Surely you can't steal only one minor number ?

yes, that's what we do.

> 
> > > Certainly stealing the major number for scsi disks seems quite
> > > dangerous.  pv-usb is hardly that unlikely a scenario.
> >  
> > we are not doing that for pvusb
> 
> pv-usb => usb mass storage => scsi disks
 
I mean there is no such thing as pv-usb.


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