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

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Message-ID: <20101110172528.GB5360@nowhere>
Date:	Wed, 10 Nov 2010 18:25:30 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>,
	"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,
	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

On Wed, Nov 10, 2010 at 11:52:40AM -0500, Steven Rostedt wrote:
> On Wed, 2010-11-10 at 16:30 +0100, Peter Zijlstra wrote:
> 
> > As for the buffer, I prefer a u64 aligned data stream, but the very
> > least I need is frame encapsulation. What I don't want _ever_ is stupid
> > sub-buffers. And no they're not needed, see the discussion about sync
> > markers a while back.
> 
> BTW, the sub buffers is just an implementation detail. I suspect that
> we'll have to end up with something that splits the buffer up. Whether
> we have 'markers' or something else. They all break down the buffer into
> a "sub-buffer".


If the size of the sub-buffers are tunable (all the same size inside a
whole buffer, but that size is tunable), then someone who doesn't want
to use subbuffers can just use a single big subbuffer :)

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