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Date: Mon, 6 Jun 2011 19:13:10 +0200
From: Ingo Molnar <mingo@...e.hu>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Arne Jansen <lists@...-jansens.de>,
Linus Torvalds <torvalds@...ux-foundation.org>,
mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
efault@....de, npiggin@...nel.dk, akpm@...ux-foundation.org,
frank.rowand@...sony.com, tglx@...utronix.de,
linux-tip-commits@...r.kernel.org
Subject: Re: [debug patch] printk: Add a printk killswitch to robustify NMI
watchdog messages
* Peter Zijlstra <peterz@...radead.org> wrote:
> Aside from not compiling (someone stuck a ref to wake_up_klogd
> somewhere in lib/) this does delay the whole of printk() output by
> up to a jiffy, if the machine dies funny you could be missing large
> parts of the output :/
oh, that's bad and i missed that aspect.
We want the console *output* immediately. That's non-negotiable!
What we want to delay are the various wakeups of secondary recipients
of printks ...
Thanks,
Ingo
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