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

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Fri, Nov 30, 2012 at 09:42:52AM +0100, Roger Pau Monné wrote:
> 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.

And I don't like the idea of software doing things in my back.
And, beside this, I don't think local vs remote is the right criteria.
There are remote filesystems which may play nice with vnd. There
are local filesystems that may not play nice with vnd.


-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--