On Thu, Dec 18, 2014 at 4:55 PM, Rusty Russell <ru...@rustcorp.com.au> wrote:
>
> The exciting thing here is the getting rid of stop_machine on module
> removal. This is possible by using a simple atomic_t for the counter,
> rather than our fancy per-cpu counter: it turns out that no one is doing
> a module increment per net packet, so the slowdown should be in the noise.
Famous last words. It may not happen per-packet, but I see
module_get() in various block drivers and in netfilter code etc, and
some of them may be pretty bad.
Let's see how it all works out.
Linus
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