#meltdown

Other methods are being discussed:

>> I'm much less worried about these "nospec_load/if" macros, than I am
>> about having a sane way to determine when they should be needed.
>>
>> Is there such a sane model right now, or are we talking "people will
>> randomly add these based on strong feelings"?

> There are people trying to tune coverity and other tool rules to identify
> cases, and some of the work so far was done that way. For x86 we didn't
> find too many so far so either the needed pattern is uncommon or .... 8)

> Given you can execute over a hundred basic instructions in a speculation
> window it does need to be a tool that can explore not just in function
> but across functions. That's really tough for the compiler itself to do
> without help.

https://lkml.org/lkml/2018/1/3/841