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A comment on GhostRace: Exploiting and Mitigating Speculative Race Conditions.

Re:GhostRace: Exploiting and Mitigating Speculative Race Con... by WJW on Friday March 15, 2024 @06:56PM (#39721544)
> Our mitigation requires minimal kernel changes (i.e., 2 LoC) and incurs only ≈5% geomean performance overhead on LMBench.

5 percent is not nothing but seems like a worthwhile investment here. Really cool exploit strategy btw.

[ Parent | on HN ]
Re:GhostRace: Exploiting and Mitigating Speculative Race Con... by loeg on Friday March 15, 2024 @09:43PM (#39722592)
5% is a pretty big regression.
[ Parent | on HN ]
Re:GhostRace: Exploiting and Mitigating Speculative Race Con... by BobbyTables2 on Saturday March 16, 2024 @07:07PM (#39730254)
Would be one thing if a single 5% penalty solved all speculative vulnerabilities…

But isn’t this like the 4th or 5th mitigation by now?

Imagine paying extra for a 4ghz CPU only to find it operates no better than 3ghz on a good day…

[ Parent | on HN ]