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xen-devel
[Xen-devel] Re: [PATCH] xen: rename gntdev and evtdev modules to be less
On Thu, 2009-12-10 at 23:25 +0000, Jeremy Fitzhardinge wrote:
> On 12/10/09 14:50, Ian Campbell wrote:
> > It never occurred to me that autoloading would work at all for this
> > driver, I always just load the module explicitly by listing
> > in /etc/modules. What triggers (or is supposed to trigger) autoloading?
> >
>
> Magic earwigs? How to misc drivers get autoloaded in general?
In the absence of an explicit request_module or module alias which
matches a device on a bus somewhere I don't think anything much has been
autoloaded since udev came along since the only other way was the old
"open a device node with no driver" method and udev effectively removed
those device nodes.
A module alias won't work since there is no device on a bus which could
match this driver and I can't find a request_module for evtchn anywhere.
If we think this driver should always get loaded when Xen is running
then I think a late_initcall which calls request_module might be the way
to go, although I'm not sure late_initcall is late enough sine it needs
to be when the proper root is mounted.
Ian.
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