Re: [RFC 2/2] rcu: Remove ->dynticks_nmi_nesting from struct rcu_dynticks

[Steven Rostedt]

On Mon, 25 Jun 2018 13:47:45 -0700
Andy Lutomirski <luto@xxxxxxxxxx> wrote:

> 
> As a straightforward example, NMI and MCE can nest inside each other.

But I'm not sure how stable the machine becomes when MCE's start
interrupting NMIs. Also, can MCE callbacks use RCU?

> IIRC we treat #DB somewhat NMI-ish-ly as well.

And #DB is something I think we finally said shouldn't be done in NMIs,
IIRC.

-- Steve