linux-kernel - Re: [PATCH 0/2] ftrace: handle NMIs safely

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Message-ID: <20081030222615.GA20507@elte.hu>
Date:	Thu, 30 Oct 2008 23:26:15 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 0/2] ftrace: handle NMIs safely


* Steven Rostedt <rostedt@...dmis.org> wrote:

> 
> On Thu, 30 Oct 2008, Ingo Molnar wrote:
> 
> > 
> > * Steven Rostedt <rostedt@...dmis.org> wrote:
> > 
> > > The robustness of ftrace has been the focus of the code modification 
> > > in 2.6.28. There is one remaining issue that needed to be addressed. 
> > > This was the case of NMIs.
> > 
> > applied to tip/tracing/nmisafe, thanks Steve!
> > 
> > this looks a lot nicer approach than either putting some sort of lock 
> > into NMI context (yuck) or the disabling of NMIs (not really possible 
> > in a generic way architecturally).
> > 
> > the impact is quite non-trivial, so i dont think this is v2.6.28 
> > material.
> 
> Ingo,
> 
> Do you want me to send patches on top of these to address Andrew's 
> comements? Or do you want me to resend these with the updates.
> 
> I prefer to send patches on top, that way Andrew can make sure I did 
> his changes correctly ;-)

yeah, please do it that way. It's a separate topic so we can fold them 
back if they are also bugfixes. (and they are all cleanliness related 
and i wanted to see the stability impact ASAP)

	Ingo
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