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Date: Wed, 27 Jan 2010 13:53:19 -0500 From: Steven Rostedt <rostedt@...dmis.org> To: "H. Peter Anvin" <hpa@...or.com> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Peter Zijlstra <peterz@...radead.org>, Tom Tromey <tromey@...hat.com>, Kyle Moffett <kyle@...fetthome.net>, "Frank Ch. Eigler" <fche@...hat.com>, Oleg Nesterov <oleg@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Stephen Rothwell <sfr@...b.auug.org.au>, Fr??d??ric Weisbecker <fweisbec@...il.com>, LKML <linux-kernel@...r.kernel.org>, Arnaldo Carvalho de Melo <acme@...hat.com>, linux-next@...r.kernel.org, utrace-devel@...hat.com, Thomas Gleixner <tglx@...utronix.de>, JimKeniston <jkenisto@...ibm.com>, Arjan van de Ven <arjan@...radead.org> Subject: Re: linux-next: add utrace tree On Wed, 2010-01-27 at 09:42 -0800, H. Peter Anvin wrote: > On 01/27/2010 05:59 AM, Steven Rostedt wrote: > > I think the issue was that ring 0 was never meant to do that, where as, > > ring 3 does it all the time. Doesn't the dynamic library modify its > > text? > > > > 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. Thanks for clarifying. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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