linux-kernel - Re: [RFC/Requirements/Design] h/w error reporting

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Message-ID: <20101110182749.GG22410@elte.hu>
Date:	Wed, 10 Nov 2010 19:27:49 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Luck, Tony" <tony.luck@...el.com>, linux-kernel@...r.kernel.org,
	ying.huang@...el.com, bp@...en8.de, tglx@...utronix.de,
	akpm@...ux-foundation.org, mchehab@...hat.com,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: Re: [RFC/Requirements/Design] h/w error reporting


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

> On Wed, 2010-11-10 at 18:48 +0100, Ingo Molnar wrote:
> 
> > Yep. The obvious direction is to extend the event buffering ABI we already have, 
> > with whatever additions that are needed:
> > 
> >  - document that we already support flight recorder mode
> 
> I thought this was still broken?

Please document that as well.

> >  - a more compressed record format
> > 
> >  - NOP filler events up to page boundary, for better splice and for better flight 
> >    recorder
> > 
> >  - splice support
> > 
> > etc. That's how it evolved until now and it's all very extensible.
> > 
> > Steve, could you please list the additions you have in mind, in order of priority?
> 
> A few of things that pop up quickly are:
> 
> 1) lockless
> 
> 2) as-fast-as possible
> 
> 3) support all tasks / all CPUs and still have as-fast-as-possible

Yeah - that's a self-evident goal for just about any kernel code.

	Ingo
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