On Mon, 11 Dec 2006 10:22:07 +0000
Al Viro <[email protected]> wrote:
> On Mon, Dec 11, 2006 at 02:17:18AM -0800, Andrew Morton wrote:
> > I think we should aim to have as many subsystems ready to go as possible -
> > ideally all of them. Right now we can potentially run userspace before
> > AIO, posix-timers, message-queues, BIO, networking, etc are ready to run.
> >
> > It looks to be pretty easy to fix...
> >
> > > As for that example, I'd love to see specifics - which driver triggers
> > > hotplug? Presumably it happens from an initcall, so we also have something
> > > fishy here...
> >
> > I don't know in this case - but firmware loading from a statically-linked
> > driver is a legit thing to do.
>
> Umm... statically linked driver that might want firmware shouldn't precede
> the subsystems unless something is seriously wrong with priorities...
There are plenty of drivers in there using subsys_initcall, arch_initcall,
postcore_initcall, core_initcall and even one pure_initcall.
Heaven knows why. They're drivers :(
> IOW, I still wonder what's really going on - pipes are fs_initcall() and
> any hardware stuff ought to be simple module_init(). So something fishy
> is going on, regardless of anything else.
A heck of a lot of things can trigger an /sbin/hotplug run. It could well
be that Andrew's driver didn't want to run hotplug at all, but the kernel
did it anwyay. But as soon as the script appeared at /sbin/hotplug, and it
happened to use foo|bar: boom.
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