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Re: kern/53616: dom0 crashes when dumping domU images with vnd+fss

On Tue, Sep 18, 2018 at 02:35:01PM +0000, wrote:
> >Description:
> I weekly backup my 3 VMs by snapshoting the associated image file:
> 1) vndconfig over the vm.img
> 2) mount the vnd device
> 3) fssconfig over the mountpoint
> 4) dd the fss device over the network

Are the VMs still running while you do this ?
If so it's no surprise that the dom0 panic: one of its mounted
filesystem got modified in its back ... you can't have the same filesystem
in use by 2 different OS instances at the same time.

You would need to snapshot and do the backup from the VM itself.

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference

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