Re: [PATCH] tracing/profile: Fix profile_disable vs module_unload

From: Peter Zijlstra
Date: Tue Aug 25 2009 - 10:53:46 EST

On Tue, 2009-08-25 at 12:47 +0200, Peter Zijlstra wrote:
> On Tue, 2009-08-25 at 12:39 +0200, Ingo Molnar wrote:
> > > Do you really wish to burden every tracepoint user with the extra
> > > logic needed to deal with modules?
> >
> > Not necessarily - i'm just outlining why i think that the 'dont
> > allow subsystems to utilize tracepoint callbacks' is a restriction
> > we should not live with voluntarily.
> Well, unless someone has a bright idea that's what it comes down to.

OK, I still think modules probing their own tracepoints its stupid [*],
but what you could do is iterate the tracepoint's callback list and see
if it has a callback outside of the module code section and then fail
the unload.

[*] in the really utterly fundamentally wrong stupid class.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at