linux-next: add utrace tree
Arjan van de Ven
arjan at infradead.org
Mon Feb 8 09:53:49 UTC 2010
On Mon, 8 Feb 2010 07:54:25 +0100
Pavel Machek <pavel at 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.
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