Re: [Xen-devel] xen_emul_unplug on xen 4.1, HVM guest 2.6.38

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Thu, 27 Oct 2011, Konrad Rzeszutek Wilk wrote:
> > > Are the PV devices meant to appear as /dev/sdX rather than /dev/xvdX?
> > 
> > No, there is no support for this in upstream kernels (in general all the
> > old behaviours of Xen kernels where they would hijack other drivers
> > device names are not upstreamble)
> 
> Wait a minute. I think these two:
> 
> konrad@phenom:~/work/linux$ git shortlog v3.0..v3.1 
> drivers/block/xen-blkfront.c
> Stefan Bader (2):
>       xen-blkfront: Drop name and minor adjustments for emulated scsi devices
>       xen-blkfront: Fix one off warning about name clash
> 
> 
> Made it happen.. as without them the Amazon EC2 would not boot?
> 
> Details: "    xen-blkfront: Drop name and minor adjustments for emulated scsi 
> devices
>     
>     These were intended to avoid the namespace clash when representing
>     emulated IDE and SCSI devices. However that seems to confuse users
>     more than expected (a disk defined as sda becomes xvde).
>     So for now go back to the scheme which does no adjustments. This
>     will break when mixing IDE and SCSI names in the configuration of
>     guests but should be by now expected"

This commit should only cause sda to become xvda rather than xvde.

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