linux-kernel - Re: [PATCH 5/5] ring-buffer: fix printk output

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Date:	Wed, 29 Apr 2009 12:19:03 -0400
From:	Valdis.Kletnieks@...edu
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 5/5] ring-buffer: fix printk output

On Tue, 28 Apr 2009 23:20:00 PDT, Andrew Morton said:
> printk_once() is racy on smp and preempt btw ;)

Looks like at worst, it's prone to the usual printk racing, plus a possible
misfire causing it to print twice before shutting up?  Or is there something
I'm missing here?

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