Re: [Xen-devel] xl create domu ：unable to add disk devices

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

Please don't drop xen-devel from Cc, and don't top post.

On Tue, Feb 26, 2019 at 11:38:11PM +0800, 敏 wrote:
> 
> 
> Sorry, I don’t understand that you said 
> 
>  And let the hotplug script map the image to a loop device.
> 
> what I need to do?

Change this line from your config file:

disk = [ 'phy:/dev/loop0,xvda,w' ]

For this one:

disk = [ 'format=raw, vdev=xvda, access=rw, target=/root/domU/rootfs.img' ]

And then you won't have to call losetup before starting the domain.

> 
> 
> > 在 2019年2月26日，22:45，Roger Pau Monné <roger.pau@xxxxxxxxxx> 写道：
> > 
> > On Tue, Feb 26, 2019 at 09:20:35PM +0800, 敏 wrote:
> >>> I am trying to create domainu（xen on FVP-Base-ReVC-2xAEMv8A）but there is 
> >>> a issue
> >> losetup /dev/loop0 /root/domU/rootfs.img
> >> I run the command xl create domu.cfg
> >> the domu.cfg：
> >> 
> >> kernel = "/root/domU/zImage 
> >> memory = "128"
> >> name = "domU" 
> >> vcpus = 1 
> >> disk = [ 'phy:/dev/loop0,xvda,w' ]
> > 
> > You could just use:
> > 
> > disk = [ 'format=raw, vdev=xvda, access=rw, target=/root/domU/rootfs.img' ]
> > 
> > And let the hotplug script map the image to a loop device.
> > 
> >> extra = "root=/dev/xvda rw console="
> >> 
> >> libxl:error:libxl_exec.c:118:libxl_report_child_exitstatus:/etc/xen/scripts/block
> >>  add[1985] exited with error status 127
> >> libxl:error:libxl_creat.c:1298:domcreat_launch_dm:Domain6:unable to add 
> >> disk devices
> > 
> > Can you provide the output when you run `xl -vvv create domu.cfg`?
> > 
> > Thanks, Roger.
> 
> 

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