From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arjan van de Ven <arjan@infradead.org>
Subject: Re: linux-next: add utrace tree
Date: Mon, 8 Feb 2010 01:53:49 -0800
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To: Pavel Machek <pavel@ucw.cz>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>, Kyle Moffett <kyle@moffetthome.net>, Arnaldo Carvalho de Melo <acme@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Fr??d??ric Weisbecker <fweisbec@gmail.com>, "H. Peter Anvin" <hpa@zytor.com>, Oleg Nesterov <oleg@redhat.com>, rostedt@goodmis.org, LKML <linux-kernel@vger.kernel.org>, Tromey <tromey@redhat.com>, "Frank Ch.
	Eigler" <fche@redhat.com>, linux-next@vger.kernel.org, Tom@redhat.com, utrace-devel@redhat.com, Linus Torvalds <torvalds@linux-foundation.org>, Thomas Gleixner <tglx@linutronix.de>
List-Id: linux-next.vger.kernel.org

On Mon, 8 Feb 2010 07:54:25 +0100
Pavel Machek <pavel@ucw.cz> wrote:

> > No, it has nothing to do with ring.  It has to do with modifying
> > code that another CPU could be executing at the same time, and with
> > modifying code on the same processor through another virtual alias
> > (they are different issues.)  The same issues apply regardless of
> > the CPL of the processor.
> 
> ...but these are always 'there could be cpu bugs around' issues,
> right? Like amd k6. AFAICT x86 always supported self-modifying code
> without any extra barriers needed...

self modifying code yes, cross modifying code no.


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
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