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DateMon, 6 Jun 2011 19:07:25 +0200
FromIngo Molnar <>
SubjectRe: [debug patch] printk: Add a printk killswitch to robustify NMI watchdog messages

* Arne Jansen <lists@die-jansens.de> wrote:

> > As long as it doesn't scramble the order of the messages, the
> > delay imho doesn't matter even in very printk-heavy debugging
> > sessions.
>
> And, as important, doesn't reduce the throughput of printk. Having
> only 100 wakeups/s sounds like the throughput is limited to
> 100xsizeof(ring buffer).

Nah.

I for example *always* kill klogd during such printk based debugging
sessions, because it's *already* very easy to overflow its buffering
abilities. Also, klogd often interferes with debugging.

So i make the log buffer big enough to contain enough debugging info.

So it's a non-issue IMHO. Linus, what do you think?

Thanks,

Ingo


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