Re: [PATCH 1 of 3] If Xen backend modules are not loaded, load them before starting Xend

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Tue, Dec 22, 2009 at 07:41:17PM +0000, Ian Campbell wrote:
> On Tue, 2009-12-22 at 16:48 +0000, Konrad Rzeszutek Wilk wrote:
> > @@ -28,6 +28,7 @@
> >       grep '    xenfs$' /proc/filesystems >/dev/null && \
> >     ! grep '^xenfs ' /proc/mounts >/dev/null;
> >  then
> > +       modprobe -q xenfs
> >         mount -t xenfs xenfs /proc/xen
> >  fi
> >   
> 
> I think this one gets requested automatically if the filesystem isn't
> currently present, see the call to request_module in
> fs/filesystems.c:get_fs_type()

Hmm, in 2.6.32 it looks to be usuable only once the filesystem has
loaded. This patch is for the case where the filesystem (xenfs) is compiled
as a module - and had not been loaded. Hence hadn't had a chance to call
fs/filesystem.c:register_filesystem().

Thought maybe I messing up this up. The "grep 'xenfs$' /proc/filesystem" checks
for xenfs in /proc/filesystem so it should not even get to the "then" statement.

Something is fishy here. Why don't we skip this patch and I will revist it
after holidays.