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SubjectRe: [BUG] x86 : i486 reporting to be vulnerable to Meltdown/Spectre_V1/Spectre_V2
On Thu 2018-02-08 20:52:40, Alan Cox wrote:
> > > Also worth nothing that the difference between the cpu and memory
> > > speeds is much lower - so far fewer instructions could be speculatively
> > > executed while waiting a cache miss.
> But they also have more instructions that take a lot of clocks and are
> easier to stall - eg by doing things like opening and mmapping
> a framebuffer and then doing a floating point double store to it
> misaligned.
> Meltdown we can at least reasonably test but spectre is hard.

Do you have pointer for simple meltdown test?

I've got but could not get it to
work even on machines that should be vulnerable.
(cesky, pictures)
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