Re: Hyper-Threading Vulnerability

[Alan Cox]

> This is not a kernel problem, but a user space problem. The fix 
> is to change the user space crypto code to need the same number of cache line
> accesses on all keys. 

You actually also need to hit the same cache line sequence on all keys
if you take a bit more care about it.

> Disabling HT for this would the totally wrong approach, like throwing
> out the baby with the bath water.

HT for most users is pretty irrelevant, its a neat idea but the
benchmarks don't suggest its too big a hit

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