> So it seems that CONFIG_X86_USE_3DNOW is simply used to
> enable access to the routines in mmx.c (the athlon-optimized
> routines on CONFIG_K7 kernels), so then it appears that somehow
> this is corrupting memory / not behaving as it should (very
> technical, right?) :)...
Feel free to go over those routines in detail by hand. I've been over them and
I can't see any problems. The obvious candidates would be races in the
kernel_fpu_begin/end code but that also seems watertight to me.
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