Re: [PATCH v2 0/3] Add support for NetBSD gntdev

[Roger Pau Monné <roger.pau%citrix.com@localhost>]

On 29/11/12 19:56, Manuel Bouyer wrote:
> On Thu, Nov 29, 2012 at 06:31:45PM +0100, Roger Pau Monne wrote:
>> The following series adds support for NetBSD gntdev to libxc, and 
>> makes libxl use Qemu as a disk backend if an image file stored on a 
>> remote filesystem is used.
> 
> 
> Can't you let the administrator decide this in the domU's config file ?
> Right now vnd on nfs has problems, but nothing unfixable.
> So one day you'll want to use the kernel driver for nfs too.
> But maybe other local filesystems will have the problem.
> So it's not for the tool do decide in the back of the admin.

We can always add a configure check later when this is fixed to decide
if it is needed or not. I don't like the idea of having to set a
configuration option if you want to use disk images on NFS, because if
you don't know about this specific issue your whole Dom0 will crash
which is really not desired or user friendly.