[PATCH v3 4/4] printk/nmi: Increase the size of NMI buffer and make it configurable

[Jiri Kosina]

On Fri, 11 Dec 2015, Russell King - ARM Linux wrote:

> I'm personally happy with the existing code, and I've been wondering why
> there's this effort to apply further cleanups - to me, the changelogs
> don't seem to make that much sense, unless we want to start using
> printk() extensively in NMI functions - using the generic nmi backtrace
> code surely gets us something that works across all architectures...

It is already being used extensively, and not only for all-CPU backtraces. 
For starters, please consider

- WARN_ON(in_nmi())
- BUG_ON(in_nmi())
- anything being printed out from MCE handlers

-- 
Jiri Kosina
SUSE Labs