Re: [PATCH] Linux Kernel Markers

Andi Kleen
2006-09-20T11:50:56Z

Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

> Ar Mer, 2006-09-20 am 09:18 +0100, ysgrifennodd Richard J Moore:
> > > Are you referring to Intel erratum "unsynchronized cross-modifying code"
> > > - where it refers to the practice of modifying code on one processor
> > > where another has prefetched the unmodified version of the code.
>
> > In the special case of replacing an opcode with int3 that erratum doesn't
> > apply. I know that's not in the manuals but it has been confirmed by the
> > Intel microarchitecture group. And it's not reasonable to it to be any
> > other way.
>
> Ok thats cool to know and I wish they'd documented it. Is the same true
> for AMD ?

It pretty much has to, otherwise lots of debuggers would be unhappy

-Andi