On Mon, Sep 18, 2017 at 11:28:32AM -0400, Cliff Brake wrote:
> On Thu, Sep 14, 2017 at 12:37 PM, Greg KH <gre...@linuxfoundation.org> wrote:
> > On Thu, Sep 14, 2017 at 08:20:09AM -0400, Cliff Brake wrote:
> >> Hi,
> >>
> >> I'm trying to better understand the kernel module loading mechanism
> >> (for example when you plug in a USB device and a kernel module
> >> autoloads).  It appears that depmod creates a module.alias map that
> >> maps USB info to modules.  Is there any way to instrument or observe
> >> the actual loading process?
> >
> > Why do you need to "observe" it?  You can always use kprobes or some
> > tracing tool to see the filesystem accesses if you really care about
> > this.
> >
> > But it should all "just work", right?  Is something failing for you?
> 
> Its working great -- more just a point of curiosity -- would like to
> understand what user-space tool is actually getting called to do the
> module loading.  Especially since the /sbin/hotplug location/mechanism
> seems to have changed -- seems we should get some of the documentation
> updated (unless I'm missing something).  Thanks for the kprobes idea
> -- will look into that and kernel source ...
> 
> (BTW, this curiosity was motivated by a Eudyptula Challenge exercise)

Not good, that's against the rules, last time I checked...
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