linux-kernel - Re: [debug patch] printk: Add a printk killswitch to robustify NMI watchdog messages

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Date:	Mon, 06 Jun 2011 18:53:57 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Arne Jansen <lists@...-jansens.de>
Cc:	Ingo Molnar <mingo@...e.hu>,
	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

On Mon, 2011-06-06 at 18:45 +0200, Arne Jansen 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). 

Right, that's another problem.. not really sure delaying all this is
going to work :/


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