linux-kernel - Re: [PATCH 3/3] ring-buffer: add design document

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Message-ID: <4A31CF8C.6060609@zytor.com>
Date:	Thu, 11 Jun 2009 20:46:20 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Huang Ying <ying.huang@...el.com>
CC:	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Theodore Tso <tytso@....edu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	"Martin J. Bligh" <mbligh@...igh.org>,
	Christoph Hellwig <hch@...radead.org>,
	Li Zefan <lizf@...fujitsu.com>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	Masami Hiramatsu <mhiramat@...hat.com>
Subject: Re: [PATCH 3/3] ring-buffer: add design document

Huang Ying wrote:
> 
> Yes. It seems that ARM is OK after FIQ save/restore issue is fixed.
> Another machine with NMI but no NMI-safe cmpxchg is "real" 386. That is
> very old machine, does that matter?
> 

Well, we still support it (UP only, though.)  It all depends on if there
is a fallback that is good enough.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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