Re: [RFC][PATCH] module: Optimize __module_address() using a latched RB-tree

Rusty Russell
2015-02-27T12:11:20Z

Peter Zijlstra <peterz@infradead.org> writes:
> One of the users of this is __kernel_text_address() which is employed in
> many stack unwinders; which in turn are used by perf-callchain (possibly
> from NMI context).

Um, so the stack unwinders use "does this look like a kernel address"
because we omit the frame pointer?

To keep that optimization, we add 220 non-trivial lines to module.c?

Don't get me wrong, it's cute code, but I do wonder if at some point a
grown up is going to come along and tell us to stop :)

Cheers,
Rusty.