It will very probably not be double caches and nothing that kind of order for requested new silicon area. Its only an annoyance because the design are not gonna

It will very probably not be double caches and nothing that kind of order for requested new silicon area. Its only an annoyance because the design are not gonna change for solid Spectre resistance (at least for its currently known versions v1 and 2) for the next chips, because their design are already complete since month if not years, and yes, that would be very significant changes. But separating the caches? Never gonna happen. Anything taking the same space as separating the caches? Never gonna happen, and actually not needed. Yes a solid Spectre fix will obviously make designers rethink their microarch in some deep aspects. But somewhat good mitigations should be available as soon as the next chips, and off-by-default is completely utterly insane. The OS is not part of the platform (except in some special cases that can disable the mitigation for performance if they like), and the platform is supposed to be retro-compatible, maybe not perfectly but reasonably. Ok it has already been somewhat less true than before in the few recent year, but lets not encourage that behavior. So shipping new CPU that are broken by default but can be somewhat less broken as an opt-in is an attempt to mask the level of the fuck-up, or maybe to avoid the creation of a new stepping. We should not tolerate that from Intel, a stepping is expensive but they have the money to do it.