Re: Athlon: Try this (was: Re: Athlon bug stomping #2)

Jan Niehusmann
2001-09-16T08:08:57Z

On Sun, Sep 16, 2001 at 09:21:49AM +0200, Steffen Persvold wrote:
> I also have a question; if "movntq; sfence" type of memory copy can cause data
> corruption in kernel space, it can in theory also do so in user space right ?
> So, if I'm right this bug could also be on machines running a 2.2 kernel with
> userspace programs using 3DNow (or SSE even) instructions.

Sure. I did crash a computer running an old kernel (not 2.2 but
2.4.0-testX without the optimised fast_copy_page) from a non-privileged
user space program containing the same code as the optimised fast_copy_page.

Jan