linux-kernel - Re: [RFC PATCH 00/11] printk: safe printing in NMI context

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Message-ID: <20140618192017.40094ae9@gandalf.local.home>
Date:	Wed, 18 Jun 2014 19:20:17 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Michal Hocko <mhocko@...e.cz>, Jan Kara <jack@...e.cz>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Dave Anderson <anderson@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Petr Mladek <pmladek@...e.cz>, Kay Sievers <kay@...y.org>
Subject: Re: [RFC PATCH 00/11] printk: safe printing in NMI context

On Wed, 18 Jun 2014 23:12:48 +0200 (CEST)
Jiri Kosina <jkosina@...e.cz> wrote:


> > I believe that this was what Steven was suggesting, though by using
> > tracing.  
> 
> My understanding was that Steven is suggesting using trace_printk() from 
> NMI.

Not quite. I was suggesting using the ftrace ring buffer. It could have
its own way to write the stack and not depend on tracing itself.

-- Steve
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