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sewer_bird | 8 years ago

I think he means Linux kernel developers hate (their own) solution for Meltdown.

discuss

order

caf|8 years ago

The essential element of the solution for Meltdown is the same in every x86-64 OS: unmapping the kernel when in usermode. This is widely hated because it makes kernel entries and exits much slower, and blows away the TLB if your hardware doesn't have PCID support.

nl|8 years ago

Yes, this.

It sucks, but what else can one do?